deg1gprod - Mathbox for metakunt

	Mathbox for metakunt		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > deg1gprod		Structured version Visualization version GIF version

Theorem deg1gprod 43192

Description: Degree multiplication is a homomorphism. (Contributed by metakunt, 6-May-2025.)

**Hypotheses**
Ref	Expression
deg1gprod.1	⊢ (𝜑 → 𝑅 ∈ IDomn)
deg1gprod.2	⊢ (𝜑 → 𝑁 ∈ Fin)
deg1gprod.3	⊢ (𝜑 → ∀𝑥 ∈ 𝑁 (𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ 𝐶 ≠ (0_g‘(Poly₁‘𝑅))))

**Assertion**
Ref	Expression
deg1gprod	⊢ (𝜑 → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶))) = Σ𝑛 ∈ 𝑁 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶)))))

Distinct variable groups: 𝐶,𝑛 𝑛,𝑁,𝑥 𝑅,𝑛,𝑥 𝜑,𝑛 Allowed substitution hints: 𝜑(𝑥) 𝐶(𝑥)

Proof of Theorem deg1gprod Dummy variables 𝑎 𝑏 𝑐 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mpteq1 5194	. . . . . 6 ⊢ (𝑎 = ∅ → (𝑥 ∈ 𝑎 ↦ 𝐶) = (𝑥 ∈ ∅ ↦ 𝐶))
2	1	oveq2d 7437	. . . . 5 ⊢ (𝑎 = ∅ → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶)))
3	2	fveq2d 6890	. . . 4 ⊢ (𝑎 = ∅ → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))))
4		sumeq1 15857	. . . 4 ⊢ (𝑎 = ∅ → Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
5	3, 4	eqeq12d 2777	. . 3 ⊢ (𝑎 = ∅ → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ↔ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))) = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛))))
6	3	breq2d 5115	. . 3 ⊢ (𝑎 = ∅ → (0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) ↔ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶)))))
7	5, 6	anbi12d 644	. 2 ⊢ (𝑎 = ∅ → ((((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)))) ↔ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))) = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))))))
8		mpteq1 5194	. . . . . 6 ⊢ (𝑎 = 𝑏 → (𝑥 ∈ 𝑎 ↦ 𝐶) = (𝑥 ∈ 𝑏 ↦ 𝐶))
9	8	oveq2d 7437	. . . . 5 ⊢ (𝑎 = 𝑏 → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶)))
10	9	fveq2d 6890	. . . 4 ⊢ (𝑎 = 𝑏 → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))
11		sumeq1 15857	. . . 4 ⊢ (𝑎 = 𝑏 → Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
12	10, 11	eqeq12d 2777	. . 3 ⊢ (𝑎 = 𝑏 → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ↔ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛))))
13	10	breq2d 5115	. . 3 ⊢ (𝑎 = 𝑏 → (0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) ↔ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶)))))
14	12, 13	anbi12d 644	. 2 ⊢ (𝑎 = 𝑏 → ((((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)))) ↔ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))))
15		mpteq1 5194	. . . . . 6 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (𝑥 ∈ 𝑎 ↦ 𝐶) = (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))
16	15	oveq2d 7437	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)))
17	16	fveq2d 6890	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))))
18		sumeq1 15857	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
19	17, 18	eqeq12d 2777	. . 3 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ↔ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛))))
20	17	breq2d 5115	. . 3 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → (0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) ↔ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)))))
21	19, 20	anbi12d 644	. 2 ⊢ (𝑎 = (𝑏 ∪ {𝑐}) → ((((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)))) ↔ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))))))
22		mpteq1 5194	. . . . . 6 ⊢ (𝑎 = 𝑁 → (𝑥 ∈ 𝑎 ↦ 𝐶) = (𝑥 ∈ 𝑁 ↦ 𝐶))
23	22	oveq2d 7437	. . . . 5 ⊢ (𝑎 = 𝑁 → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶)))
24	23	fveq2d 6890	. . . 4 ⊢ (𝑎 = 𝑁 → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶))))
25		sumeq1 15857	. . . 4 ⊢ (𝑎 = 𝑁 → Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = Σ𝑛 ∈ 𝑁 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
26	24, 25	eqeq12d 2777	. . 3 ⊢ (𝑎 = 𝑁 → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ↔ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶))) = Σ𝑛 ∈ 𝑁 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛))))
27	24	breq2d 5115	. . 3 ⊢ (𝑎 = 𝑁 → (0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) ↔ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶)))))
28	26, 27	anbi12d 644	. 2 ⊢ (𝑎 = 𝑁 → ((((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶))) = Σ𝑛 ∈ 𝑎 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑎 ↦ 𝐶)))) ↔ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶))) = Σ𝑛 ∈ 𝑁 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶))))))
29		mpt0 6682	. . . . . . . . 9 ⊢ (𝑥 ∈ ∅ ↦ 𝐶) = ∅
30	29	a1i 11	. . . . . . . 8 ⊢ (𝜑 → (𝑥 ∈ ∅ ↦ 𝐶) = ∅)
31	30	oveq2d 7437	. . . . . . 7 ⊢ (𝜑 → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g ∅))
32		eqid 2761	. . . . . . . . 9 ⊢ (0_g‘(mulGrp‘(Poly₁‘𝑅))) = (0_g‘(mulGrp‘(Poly₁‘𝑅)))
33	32	gsum0 18874	. . . . . . . 8 ⊢ ((mulGrp‘(Poly₁‘𝑅)) Σ_g ∅) = (0_g‘(mulGrp‘(Poly₁‘𝑅)))
34	33	a1i 11	. . . . . . 7 ⊢ (𝜑 → ((mulGrp‘(Poly₁‘𝑅)) Σ_g ∅) = (0_g‘(mulGrp‘(Poly₁‘𝑅))))
35	31, 34	eqtrd 2796	. . . . . 6 ⊢ (𝜑 → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶)) = (0_g‘(mulGrp‘(Poly₁‘𝑅))))
36	35	fveq2d 6890	. . . . 5 ⊢ (𝜑 → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))) = ((deg₁‘𝑅)‘(0_g‘(mulGrp‘(Poly₁‘𝑅)))))
37		deg1gprod.1	. . . . . . . . . 10 ⊢ (𝜑 → 𝑅 ∈ IDomn)
38	37	idomringd 20980	. . . . . . . . 9 ⊢ (𝜑 → 𝑅 ∈ Ring)
39		eqid 2761	. . . . . . . . . 10 ⊢ (Poly₁‘𝑅) = (Poly₁‘𝑅)
40		eqid 2761	. . . . . . . . . 10 ⊢ (algSc‘(Poly₁‘𝑅)) = (algSc‘(Poly₁‘𝑅))
41		eqid 2761	. . . . . . . . . 10 ⊢ (1_r‘𝑅) = (1_r‘𝑅)
42		eqid 2761	. . . . . . . . . . . 12 ⊢ (mulGrp‘(Poly₁‘𝑅)) = (mulGrp‘(Poly₁‘𝑅))
43		eqid 2761	. . . . . . . . . . . 12 ⊢ (1_r‘(Poly₁‘𝑅)) = (1_r‘(Poly₁‘𝑅))
44	42, 43	ringidval 20410	. . . . . . . . . . 11 ⊢ (1_r‘(Poly₁‘𝑅)) = (0_g‘(mulGrp‘(Poly₁‘𝑅)))
45	44	eqcomi 2770	. . . . . . . . . 10 ⊢ (0_g‘(mulGrp‘(Poly₁‘𝑅))) = (1_r‘(Poly₁‘𝑅))
46	39, 40, 41, 45	ply1scl1 22612	. . . . . . . . 9 ⊢ (𝑅 ∈ Ring → ((algSc‘(Poly₁‘𝑅))‘(1_r‘𝑅)) = (0_g‘(mulGrp‘(Poly₁‘𝑅))))
47	38, 46	syl 18	. . . . . . . 8 ⊢ (𝜑 → ((algSc‘(Poly₁‘𝑅))‘(1_r‘𝑅)) = (0_g‘(mulGrp‘(Poly₁‘𝑅))))
48	47	eqcomd 2767	. . . . . . 7 ⊢ (𝜑 → (0_g‘(mulGrp‘(Poly₁‘𝑅))) = ((algSc‘(Poly₁‘𝑅))‘(1_r‘𝑅)))
49	48	fveq2d 6890	. . . . . 6 ⊢ (𝜑 → ((deg₁‘𝑅)‘(0_g‘(mulGrp‘(Poly₁‘𝑅)))) = ((deg₁‘𝑅)‘((algSc‘(Poly₁‘𝑅))‘(1_r‘𝑅))))
50		eqid 2761	. . . . . . . . 9 ⊢ (Base‘𝑅) = (Base‘𝑅)
51	50, 41	ringidcl 20495	. . . . . . . 8 ⊢ (𝑅 ∈ Ring → (1_r‘𝑅) ∈ (Base‘𝑅))
52	38, 51	syl 18	. . . . . . 7 ⊢ (𝜑 → (1_r‘𝑅) ∈ (Base‘𝑅))
53	37	idomdomd 20978	. . . . . . . . 9 ⊢ (𝜑 → 𝑅 ∈ Domn)
54		domnnzr 20959	. . . . . . . . 9 ⊢ (𝑅 ∈ Domn → 𝑅 ∈ NzRing)
55	53, 54	syl 18	. . . . . . . 8 ⊢ (𝜑 → 𝑅 ∈ NzRing)
56		eqid 2761	. . . . . . . . 9 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
57	41, 56	nzrnz 20766	. . . . . . . 8 ⊢ (𝑅 ∈ NzRing → (1_r‘𝑅) ≠ (0_g‘𝑅))
58	55, 57	syl 18	. . . . . . 7 ⊢ (𝜑 → (1_r‘𝑅) ≠ (0_g‘𝑅))
59		eqid 2761	. . . . . . . 8 ⊢ (deg₁‘𝑅) = (deg₁‘𝑅)
60	59, 39, 50, 40, 56	deg1scl 26432	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ (1_r‘𝑅) ∈ (Base‘𝑅) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → ((deg₁‘𝑅)‘((algSc‘(Poly₁‘𝑅))‘(1_r‘𝑅))) = 0)
61	38, 52, 58, 60	syl3anc 1398	. . . . . 6 ⊢ (𝜑 → ((deg₁‘𝑅)‘((algSc‘(Poly₁‘𝑅))‘(1_r‘𝑅))) = 0)
62	49, 61	eqtrd 2796	. . . . 5 ⊢ (𝜑 → ((deg₁‘𝑅)‘(0_g‘(mulGrp‘(Poly₁‘𝑅)))) = 0)
63	36, 62	eqtrd 2796	. . . 4 ⊢ (𝜑 → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))) = 0)
64		sum0 15888	. . . . . 6 ⊢ Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = 0
65	64	eqcomi 2770	. . . . 5 ⊢ 0 = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛))
66	65	a1i 11	. . . 4 ⊢ (𝜑 → 0 = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
67	63, 66	eqtrd 2796	. . 3 ⊢ (𝜑 → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))) = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
68		0red 11312	. . . . 5 ⊢ (𝜑 → 0 ∈ ℝ)
69	68	leidd 11883	. . . 4 ⊢ (𝜑 → 0 ≤ 0)
70	63	eqcomd 2767	. . . 4 ⊢ (𝜑 → 0 = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))))
71	69, 70	breqtrd 5131	. . 3 ⊢ (𝜑 → 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))))
72	67, 71	jca 521	. 2 ⊢ (𝜑 → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶))) = Σ𝑛 ∈ ∅ ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ ∅ ↦ 𝐶)))))
73		nfcv 2923	. . . . . . . . 9 ⊢ Ⅎ𝑦𝐶
74		nfcsb1v 3871	. . . . . . . . 9 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐶
75		csbeq1a 3861	. . . . . . . . 9 ⊢ (𝑥 = 𝑦 → 𝐶 = ⦋𝑦 / 𝑥⦌𝐶)
76	73, 74, 75	cbvmpt 5207	. . . . . . . 8 ⊢ (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶) = (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶)
77	76	a1i 11	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶) = (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶))
78	77	oveq2d 7437	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶)))
79	78	fveq2d 6890	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶))))
80		eqid 2761	. . . . . . . 8 ⊢ (Base‘(mulGrp‘(Poly₁‘𝑅))) = (Base‘(mulGrp‘(Poly₁‘𝑅)))
81		eqid 2761	. . . . . . . 8 ⊢ (+_g‘(mulGrp‘(Poly₁‘𝑅))) = (+_g‘(mulGrp‘(Poly₁‘𝑅)))
82		isidom 20977	. . . . . . . . . . . . . 14 ⊢ (𝑅 ∈ IDomn ↔ (𝑅 ∈ CRing ∧ 𝑅 ∈ Domn))
83	37, 82	sylib 221	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑅 ∈ CRing ∧ 𝑅 ∈ Domn))
84	83	simpld 500	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑅 ∈ CRing)
85	39	ply1crng 22517	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ CRing → (Poly₁‘𝑅) ∈ CRing)
86	84, 85	syl 18	. . . . . . . . . . 11 ⊢ (𝜑 → (Poly₁‘𝑅) ∈ CRing)
87	42	crngmgp 20468	. . . . . . . . . . 11 ⊢ ((Poly₁‘𝑅) ∈ CRing → (mulGrp‘(Poly₁‘𝑅)) ∈ CMnd)
88	86, 87	syl 18	. . . . . . . . . 10 ⊢ (𝜑 → (mulGrp‘(Poly₁‘𝑅)) ∈ CMnd)
89	88	adantr 486	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → (mulGrp‘(Poly₁‘𝑅)) ∈ CMnd)
90	89	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (mulGrp‘(Poly₁‘𝑅)) ∈ CMnd)
91		deg1gprod.2	. . . . . . . . . 10 ⊢ (𝜑 → 𝑁 ∈ Fin)
92	91	ad2antrr 739	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 𝑁 ∈ Fin)
93		simplrl 789	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 𝑏 ⊆ 𝑁)
94	92, 93	ssfid 9261	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 𝑏 ∈ Fin)
95	93	sselda 3929	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) ∧ 𝑦 ∈ 𝑏) → 𝑦 ∈ 𝑁)
96		deg1gprod.3	. . . . . . . . . . . . 13 ⊢ (𝜑 → ∀𝑥 ∈ 𝑁 (𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ 𝐶 ≠ (0_g‘(Poly₁‘𝑅))))
97		r19.26 3123	. . . . . . . . . . . . . 14 ⊢ (∀𝑥 ∈ 𝑁 (𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ 𝐶 ≠ (0_g‘(Poly₁‘𝑅))) ↔ (∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅))))
98	97	biimpi 219	. . . . . . . . . . . . 13 ⊢ (∀𝑥 ∈ 𝑁 (𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ 𝐶 ≠ (0_g‘(Poly₁‘𝑅))) → (∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅))))
99	96, 98	syl 18	. . . . . . . . . . . 12 ⊢ (𝜑 → (∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅))))
100	99	simpld 500	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
101	100	ad3antrrr 743	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) ∧ 𝑦 ∈ 𝑏) → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
102		rspcsbela 4396	. . . . . . . . . 10 ⊢ ((𝑦 ∈ 𝑁 ∧ ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅))) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
103	95, 101, 102	syl2anc 596	. . . . . . . . 9 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) ∧ 𝑦 ∈ 𝑏) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
104		eqid 2761	. . . . . . . . . 10 ⊢ (Base‘(Poly₁‘𝑅)) = (Base‘(Poly₁‘𝑅))
105	42, 104	mgpbas 20366	. . . . . . . . 9 ⊢ (Base‘(Poly₁‘𝑅)) = (Base‘(mulGrp‘(Poly₁‘𝑅)))
106	103, 105	eleqtrdi 2871	. . . . . . . 8 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) ∧ 𝑦 ∈ 𝑏) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (Base‘(mulGrp‘(Poly₁‘𝑅))))
107		eldifi 4078	. . . . . . . . . . 11 ⊢ (𝑐 ∈ (𝑁 ∖ 𝑏) → 𝑐 ∈ 𝑁)
108	107	adantl 487	. . . . . . . . . 10 ⊢ ((𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏)) → 𝑐 ∈ 𝑁)
109	108	adantl 487	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → 𝑐 ∈ 𝑁)
110	109	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 𝑐 ∈ 𝑁)
111		eldifn 4079	. . . . . . . . . . 11 ⊢ (𝑐 ∈ (𝑁 ∖ 𝑏) → ¬ 𝑐 ∈ 𝑏)
112	111	adantl 487	. . . . . . . . . 10 ⊢ ((𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏)) → ¬ 𝑐 ∈ 𝑏)
113	112	adantl 487	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ¬ 𝑐 ∈ 𝑏)
114	113	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ¬ 𝑐 ∈ 𝑏)
115	100	ad2antrr 739	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
116		rspcsbela 4396	. . . . . . . . . 10 ⊢ ((𝑐 ∈ 𝑁 ∧ ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅))) → ⦋𝑐 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
117	110, 115, 116	syl2anc 596	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ⦋𝑐 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
118	117, 105	eleqtrdi 2871	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ⦋𝑐 / 𝑥⦌𝐶 ∈ (Base‘(mulGrp‘(Poly₁‘𝑅))))
119		csbeq1 3850	. . . . . . . 8 ⊢ (𝑦 = 𝑐 → ⦋𝑦 / 𝑥⦌𝐶 = ⦋𝑐 / 𝑥⦌𝐶)
120	80, 81, 90, 94, 106, 110, 114, 118, 119	gsumunsn 20175	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶)) = (((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))(+_g‘(mulGrp‘(Poly₁‘𝑅)))⦋𝑐 / 𝑥⦌𝐶))
121	120	fveq2d 6890	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶))) = ((deg₁‘𝑅)‘(((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))(+_g‘(mulGrp‘(Poly₁‘𝑅)))⦋𝑐 / 𝑥⦌𝐶)))
122		eqid 2761	. . . . . . . . . 10 ⊢ (._r‘(Poly₁‘𝑅)) = (._r‘(Poly₁‘𝑅))
123	42, 122	mgpplusg 20365	. . . . . . . . 9 ⊢ (._r‘(Poly₁‘𝑅)) = (+_g‘(mulGrp‘(Poly₁‘𝑅)))
124	123	eqcomi 2770	. . . . . . . 8 ⊢ (+_g‘(mulGrp‘(Poly₁‘𝑅))) = (._r‘(Poly₁‘𝑅))
125		eqid 2761	. . . . . . . 8 ⊢ (0_g‘(Poly₁‘𝑅)) = (0_g‘(Poly₁‘𝑅))
126	53	adantr 486	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → 𝑅 ∈ Domn)
127	126	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 𝑅 ∈ Domn)
128	103	ralrimiva 3155	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ∀𝑦 ∈ 𝑏 ⦋𝑦 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
129	105, 90, 94, 128	gsummptcl 20182	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶)) ∈ (Base‘(Poly₁‘𝑅)))
130	39	ply1idom 26444	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ IDomn → (Poly₁‘𝑅) ∈ IDomn)
131	37, 130	syl 18	. . . . . . . . . . 11 ⊢ (𝜑 → (Poly₁‘𝑅) ∈ IDomn)
132	131	adantr 486	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → (Poly₁‘𝑅) ∈ IDomn)
133	132	adantr 486	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (Poly₁‘𝑅) ∈ IDomn)
134	99	simprd 501	. . . . . . . . . . 11 ⊢ (𝜑 → ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
135	134	ad3antrrr 743	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) ∧ 𝑦 ∈ 𝑏) → ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
136		rspcsbnea 43183	. . . . . . . . . 10 ⊢ ((𝑦 ∈ 𝑁 ∧ ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅))) → ⦋𝑦 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
137	95, 135, 136	syl2anc 596	. . . . . . . . 9 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) ∧ 𝑦 ∈ 𝑏) → ⦋𝑦 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
138	42, 133, 94, 103, 137	idomnnzgmulnz 43185	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶)) ≠ (0_g‘(Poly₁‘𝑅)))
139	134	ad2antrr 739	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
140		rspcsbnea 43183	. . . . . . . . 9 ⊢ ((𝑐 ∈ 𝑁 ∧ ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅))) → ⦋𝑐 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
141	110, 139, 140	syl2anc 596	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ⦋𝑐 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
142	59, 39, 104, 124, 125, 127, 129, 138, 117, 141	deg1mul 26434	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘(((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))(+_g‘(mulGrp‘(Poly₁‘𝑅)))⦋𝑐 / 𝑥⦌𝐶)) = (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)))
143	73, 74, 75	cbvmpt 5207	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ 𝑏 ↦ 𝐶) = (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶)
144	143	eqcomi 2770	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶) = (𝑥 ∈ 𝑏 ↦ 𝐶)
145	144	a1i 11	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶) = (𝑥 ∈ 𝑏 ↦ 𝐶))
146	145	oveq2d 7437	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶)))
147	146	fveq2d 6890	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))) = ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))
148	147	oveq1d 7436	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)) = (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)))
149		simpl 488	. . . . . . . . . . 11 ⊢ ((((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶)))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
150	149	adantl 487	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
151	150	oveq1d 7436	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)) = (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)))
152		nfv 1947	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑛(𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏)))
153		nfcv 2923	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑛((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐))
154	91	adantr 486	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → 𝑁 ∈ Fin)
155		simprl 783	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → 𝑏 ⊆ 𝑁)
156	154, 155	ssfid 9261	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → 𝑏 ∈ Fin)
157	73, 74, 75	cbvmpt 5207	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ 𝑁 ↦ 𝐶) = (𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)
158	157	fveq1i 6887	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛) = ((𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)‘𝑛)
159	158	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛) = ((𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)‘𝑛))
160	159	fveq2d 6890	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = ((deg₁‘𝑅)‘((𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)‘𝑛)))
161		eqidd 2762	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → (𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶) = (𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶))
162		simpr 490	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) ∧ 𝑦 = 𝑛) → 𝑦 = 𝑛)
163	162	csbeq1d 3851	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) ∧ 𝑦 = 𝑛) → ⦋𝑦 / 𝑥⦌𝐶 = ⦋𝑛 / 𝑥⦌𝐶)
164	155	sselda 3929	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → 𝑛 ∈ 𝑁)
165	100	adantr 486	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
166	165	adantr 486	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
167		rspcsbela 4396	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑛 ∈ 𝑁 ∧ ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅))) → ⦋𝑛 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
168	164, 166, 167	syl2anc 596	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ⦋𝑛 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
169	161, 163, 164, 168	fvmptd 7002	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)‘𝑛) = ⦋𝑛 / 𝑥⦌𝐶)
170	169	fveq2d 6890	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((deg₁‘𝑅)‘((𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)‘𝑛)) = ((deg₁‘𝑅)‘⦋𝑛 / 𝑥⦌𝐶))
171	38	adantr 486	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → 𝑅 ∈ Ring)
172	171	adantr 486	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → 𝑅 ∈ Ring)
173	134	ad2antrr 739	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
174		rspcsbnea 43183	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑛 ∈ 𝑁 ∧ ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅))) → ⦋𝑛 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
175	164, 173, 174	syl2anc 596	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ⦋𝑛 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
176	59, 39, 125, 104	deg1nn0cl 26407	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑅 ∈ Ring ∧ ⦋𝑛 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ ⦋𝑛 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅))) → ((deg₁‘𝑅)‘⦋𝑛 / 𝑥⦌𝐶) ∈ ℕ₀)
177	172, 168, 175, 176	syl3anc 1398	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((deg₁‘𝑅)‘⦋𝑛 / 𝑥⦌𝐶) ∈ ℕ₀)
178	170, 177	eqeltrd 2861	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((deg₁‘𝑅)‘((𝑦 ∈ 𝑁 ↦ ⦋𝑦 / 𝑥⦌𝐶)‘𝑛)) ∈ ℕ₀)
179	160, 178	eqeltrd 2861	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∈ ℕ₀)
180	179	nn0cnd 12670	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑛 ∈ 𝑏) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∈ ℂ)
181		2fveq3 6891	. . . . . . . . . . . . 13 ⊢ (𝑛 = 𝑐 → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐)))
182	109, 165, 116	syl2anc 596	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ⦋𝑐 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
183		eqid 2761	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ 𝑁 ↦ 𝐶) = (𝑥 ∈ 𝑁 ↦ 𝐶)
184	183	fvmpts 6998	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑐 ∈ 𝑁 ∧ ⦋𝑐 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅))) → ((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐) = ⦋𝑐 / 𝑥⦌𝐶)
185	109, 182, 184	syl2anc 596	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐) = ⦋𝑐 / 𝑥⦌𝐶)
186	185	fveq2d 6890	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐)) = ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶))
187	108, 134, 140	syl2anr 609	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ⦋𝑐 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
188	59, 39, 125, 104	deg1nn0cl 26407	. . . . . . . . . . . . . . . 16 ⊢ ((𝑅 ∈ Ring ∧ ⦋𝑐 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)) ∧ ⦋𝑐 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅))) → ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶) ∈ ℕ₀)
189	171, 182, 187, 188	syl3anc 1398	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶) ∈ ℕ₀)
190	186, 189	eqeltrd 2861	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐)) ∈ ℕ₀)
191	190	nn0cnd 12670	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐)) ∈ ℂ)
192	152, 153, 156, 109, 113, 180, 181, 191	fsumsplitsn 15911	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐))))
193	192	adantr 486	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐))))
194	185	adantr 486	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐) = ⦋𝑐 / 𝑥⦌𝐶)
195	194	fveq2d 6890	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐)) = ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶))
196	195	oveq2d 7437	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑐))) = (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)))
197	193, 196	eqtrd 2796	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) = (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)))
198	197	eqcomd 2767	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
199	151, 198	eqtrd 2796	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
200	148, 199	eqtrd 2796	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))) + ((deg₁‘𝑅)‘⦋𝑐 / 𝑥⦌𝐶)) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
201	142, 200	eqtrd 2796	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘(((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ 𝑏 ↦ ⦋𝑦 / 𝑥⦌𝐶))(+_g‘(mulGrp‘(Poly₁‘𝑅)))⦋𝑐 / 𝑥⦌𝐶)) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
202	121, 201	eqtrd 2796	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶))) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
203	79, 202	eqtrd 2796	. . . 4 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)))
204	171	adantr 486	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 𝑅 ∈ Ring)
205	110	snssd 4747	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → {𝑐} ⊆ 𝑁)
206	93, 205	unssd 4138	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (𝑏 ∪ {𝑐}) ⊆ 𝑁)
207	92, 206	ssfid 9261	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (𝑏 ∪ {𝑐}) ∈ Fin)
208	165	adantr 486	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
209		ssralv 3998	. . . . . . . . 9 ⊢ ((𝑏 ∪ {𝑐}) ⊆ 𝑁 → (∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)) → ∀𝑥 ∈ (𝑏 ∪ {𝑐})𝐶 ∈ (Base‘(Poly₁‘𝑅))))
210	206, 209	syl 18	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)) → ∀𝑥 ∈ (𝑏 ∪ {𝑐})𝐶 ∈ (Base‘(Poly₁‘𝑅))))
211	208, 210	mpd 16	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ∀𝑥 ∈ (𝑏 ∪ {𝑐})𝐶 ∈ (Base‘(Poly₁‘𝑅)))
212	105, 90, 207, 211	gsummptcl 20182	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) ∈ (Base‘(Poly₁‘𝑅)))
213	76	oveq2i 7432	. . . . . . . . 9 ⊢ ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶))
214	213	a1i 11	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) = ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶)))
215	109	snssd 4747	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → {𝑐} ⊆ 𝑁)
216	155, 215	unssd 4138	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → (𝑏 ∪ {𝑐}) ⊆ 𝑁)
217	154, 216	ssfid 9261	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → (𝑏 ∪ {𝑐}) ∈ Fin)
218	216	sselda 3929	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑦 ∈ (𝑏 ∪ {𝑐})) → 𝑦 ∈ 𝑁)
219	165	adantr 486	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑦 ∈ (𝑏 ∪ {𝑐})) → ∀𝑥 ∈ 𝑁 𝐶 ∈ (Base‘(Poly₁‘𝑅)))
220	218, 219, 102	syl2anc 596	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑦 ∈ (𝑏 ∪ {𝑐})) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (Base‘(Poly₁‘𝑅)))
221	134	ad2antrr 739	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑦 ∈ (𝑏 ∪ {𝑐})) → ∀𝑥 ∈ 𝑁 𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
222	218, 221, 136	syl2anc 596	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ 𝑦 ∈ (𝑏 ∪ {𝑐})) → ⦋𝑦 / 𝑥⦌𝐶 ≠ (0_g‘(Poly₁‘𝑅)))
223	42, 132, 217, 220, 222	idomnnzgmulnz 43185	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑦 ∈ (𝑏 ∪ {𝑐}) ↦ ⦋𝑦 / 𝑥⦌𝐶)) ≠ (0_g‘(Poly₁‘𝑅)))
224	214, 223	eqnetrd 3023	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) ≠ (0_g‘(Poly₁‘𝑅)))
225	224	adantr 486	. . . . . 6 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) ≠ (0_g‘(Poly₁‘𝑅)))
226	59, 39, 125, 104	deg1nn0cl 26407	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) ∈ (Base‘(Poly₁‘𝑅)) ∧ ((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)) ≠ (0_g‘(Poly₁‘𝑅))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) ∈ ℕ₀)
227	204, 212, 225, 226	syl3anc 1398	. . . . 5 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) ∈ ℕ₀)
228	227	nn0ge0d 12671	. . . 4 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))))
229	203, 228	jca 521	. . 3 ⊢ (((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) ∧ (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))))) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶)))))
230	229	ex 418	. 2 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝑁 ∧ 𝑐 ∈ (𝑁 ∖ 𝑏))) → ((((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶))) = Σ𝑛 ∈ 𝑏 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑏 ↦ 𝐶)))) → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))) = Σ𝑛 ∈ (𝑏 ∪ {𝑐})((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ (𝑏 ∪ {𝑐}) ↦ 𝐶))))))
231	7, 14, 21, 28, 72, 230, 91	findcard2d 9183	1 ⊢ (𝜑 → (((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶))) = Σ𝑛 ∈ 𝑁 ((deg₁‘𝑅)‘((𝑥 ∈ 𝑁 ↦ 𝐶)‘𝑛)) ∧ 0 ≤ ((deg₁‘𝑅)‘((mulGrp‘(Poly₁‘𝑅)) Σ_g (𝑥 ∈ 𝑁 ↦ 𝐶)))))

Colors of variables: wff setvar class

This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ≠ wne 2956 ∀wral 3077 ⦋csb 3847 ∖ cdif 3896 ∪ cun 3897 ⊆ wss 3914 ∅c0 4279 {csn 4584 class class class wbr 5103 ↦ cmpt 5186 ‘cfv 6539 (class class class)co 7421 Fincfn 8974 0cc0 11201 + caddc 11204 ≤ cle 11345 ℕ₀cn0 12607 Σcsu 15854 Basecbs 17388 +_gcplusg 17429 ._rcmulr 17430 0_gc0g 17611 Σ_g cgsu 17612 CMndccmn 19995 mulGrpcmgp 20361 1_rcur 20408 Ringcrg 20460 CRingccrg 20461 NzRingcnzr 20763 Domncdomn 20945 IDomncidom 20946 algSccascl 22161 Poly₁cpl1 22496 deg₁cdg1 26373

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7752 ax-inf2 9643 ax-cnex 11257 ax-resscn 11258 ax-1cn 11259 ax-icn 11260 ax-addcl 11261 ax-addrcl 11262 ax-mulcl 11263 ax-mulrcl 11264 ax-mulcom 11265 ax-addass 11266 ax-mulass 11267 ax-distr 11268 ax-i2m1 11269 ax-1ne0 11270 ax-1rid 11271 ax-rnegex 11272 ax-rrecex 11273 ax-cnre 11274 ax-pre-lttri 11275 ax-pre-lttrn 11276 ax-pre-ltadd 11277 ax-pre-mulgt0 11278 ax-pre-sup 11279 ax-addf 11280

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3900 df-un 3902 df-in 3904 df-ss 3915 df-pss 4035 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-iin 4954 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6305 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-of 7694 df-ofr 7695 df-om 7879 df-1st 8002 df-2nd 8003 df-supp 8179 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-2o 8478 df-er 8718 df-map 8850 df-pm 8851 df-ixp 8927 df-en 8975 df-dom 8976 df-sdom 8977 df-fin 8978 df-fsupp 9355 df-sup 9435 df-oi 9505 df-card 10021 df-pnf 11346 df-mnf 11347 df-xr 11348 df-ltxr 11349 df-le 11350 df-sub 11544 df-neg 11545 df-div 11975 df-nn 12337 df-2 12406 df-3 12407 df-4 12408 df-5 12409 df-6 12410 df-7 12411 df-8 12412 df-9 12413 df-n0 12608 df-z 12695 df-dec 12816 df-uz 12967 df-rp 13122 df-fz 13641 df-fzo 13790 df-seq 14146 df-exp 14206 df-hash 14476 df-cj 15267 df-re 15268 df-im 15269 df-sqrt 15403 df-abs 15404 df-clim 15656 df-sum 15855 df-struct 17326 df-sets 17343 df-slot 17361 df-ndx 17373 df-base 17389 df-ress 17410 df-plusg 17442 df-mulr 17443 df-starv 17444 df-sca 17445 df-vsca 17446 df-ip 17447 df-tset 17448 df-ple 17449 df-ds 17451 df-unif 17452 df-hom 17453 df-cco 17454 df-0g 17613 df-gsum 17614 df-prds 17619 df-pws 17621 df-mre 17757 df-mrc 17758 df-acs 17760 df-mgm 18817 df-sgrp 18909 df-mnd 18925 df-mhm 18979 df-submnd 18980 df-grp 19148 df-minusg 19149 df-sbg 19150 df-mulg 19279 df-subg 19334 df-ghm 19429 df-cntz 19532 df-cmn 19997 df-abl 19998 df-mgp 20362 df-rng 20376 df-ur 20409 df-ring 20462 df-cring 20463 df-nzr 20764 df-subrng 20799 df-subrg 20823 df-rlreg 20947 df-domn 20948 df-idom 20949 df-lmod 21138 df-lss 21208 df-cnfld 21680 df-ascl 22164 df-psr 22218 df-mvr 22219 df-mpl 22220 df-opsr 22222 df-psr1 22499 df-vr1 22500 df-ply1 22501 df-coe1 22502 df-mdeg 26374 df-deg1 26375

This theorem is used by: aks6d1c6lem1 43222

W3C validator