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Theorem ply1divmo 25500

Description: Uniqueness of a quotient in a polynomial division. For polynomials 𝐹, 𝐺 such that 𝐺 ≠ 0 and the leading coefficient of 𝐺 is not a zero divisor, there is at most one polynomial 𝑞 which satisfies 𝐹 = (𝐺 · 𝑞) + 𝑟 where the degree of 𝑟 is less than the degree of 𝐺. (Contributed by Stefan O'Rear, 26-Mar-2015.) (Revised by NM, 17-Jun-2017.)

**Hypotheses**
Ref	Expression
ply1divalg.p	⊢ 𝑃 = (Poly₁‘𝑅)
ply1divalg.d	⊢ 𝐷 = ( deg₁ ‘𝑅)
ply1divalg.b	⊢ 𝐵 = (Base‘𝑃)
ply1divalg.m	⊢ − = (-_g‘𝑃)
ply1divalg.z	⊢ 0 = (0_g‘𝑃)
ply1divalg.t	⊢ ∙ = (._r‘𝑃)
ply1divalg.r1	⊢ (𝜑 → 𝑅 ∈ Ring)
ply1divalg.f	⊢ (𝜑 → 𝐹 ∈ 𝐵)
ply1divalg.g1	⊢ (𝜑 → 𝐺 ∈ 𝐵)
ply1divalg.g2	⊢ (𝜑 → 𝐺 ≠ 0 )
ply1divmo.g3	⊢ (𝜑 → ((coe₁‘𝐺)‘(𝐷‘𝐺)) ∈ 𝐸)
ply1divmo.e	⊢ 𝐸 = (RLReg‘𝑅)

**Assertion**
Ref	Expression
ply1divmo	⊢ (𝜑 → ∃*𝑞 ∈ 𝐵 (𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺))

Distinct variable groups: 𝜑,𝑞 𝐵,𝑞 𝐷,𝑞 𝐹,𝑞 𝐺,𝑞 − ,𝑞 ∙ ,𝑞 Allowed substitution hints: 𝑃(𝑞) 𝑅(𝑞) 𝐸(𝑞) 0 (𝑞)

Proof of Theorem ply1divmo Dummy variable 𝑟 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ply1divalg.r1	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑅 ∈ Ring)
2	1	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝑅 ∈ Ring)
3		ply1divalg.p	. . . . . . . . . . . . 13 ⊢ 𝑃 = (Poly₁‘𝑅)
4	3	ply1ring 21619	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ Ring → 𝑃 ∈ Ring)
5	2, 4	syl 17	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝑃 ∈ Ring)
6		ringgrp 19969	. . . . . . . . . . 11 ⊢ (𝑃 ∈ Ring → 𝑃 ∈ Grp)
7	5, 6	syl 17	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝑃 ∈ Grp)
8		ply1divalg.f	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹 ∈ 𝐵)
9	8	adantr 481	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝐹 ∈ 𝐵)
10		ply1divalg.g1	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐺 ∈ 𝐵)
11	10	adantr 481	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝐺 ∈ 𝐵)
12		simprl 769	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝑞 ∈ 𝐵)
13		ply1divalg.b	. . . . . . . . . . . . 13 ⊢ 𝐵 = (Base‘𝑃)
14		ply1divalg.t	. . . . . . . . . . . . 13 ⊢ ∙ = (._r‘𝑃)
15	13, 14	ringcl 19981	. . . . . . . . . . . 12 ⊢ ((𝑃 ∈ Ring ∧ 𝐺 ∈ 𝐵 ∧ 𝑞 ∈ 𝐵) → (𝐺 ∙ 𝑞) ∈ 𝐵)
16	5, 11, 12, 15	syl3anc 1371	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐺 ∙ 𝑞) ∈ 𝐵)
17		ply1divalg.m	. . . . . . . . . . . 12 ⊢ − = (-_g‘𝑃)
18	13, 17	grpsubcl 18827	. . . . . . . . . . 11 ⊢ ((𝑃 ∈ Grp ∧ 𝐹 ∈ 𝐵 ∧ (𝐺 ∙ 𝑞) ∈ 𝐵) → (𝐹 − (𝐺 ∙ 𝑞)) ∈ 𝐵)
19	7, 9, 16, 18	syl3anc 1371	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐹 − (𝐺 ∙ 𝑞)) ∈ 𝐵)
20		simprr 771	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝑟 ∈ 𝐵)
21	13, 14	ringcl 19981	. . . . . . . . . . . 12 ⊢ ((𝑃 ∈ Ring ∧ 𝐺 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵) → (𝐺 ∙ 𝑟) ∈ 𝐵)
22	5, 11, 20, 21	syl3anc 1371	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐺 ∙ 𝑟) ∈ 𝐵)
23	13, 17	grpsubcl 18827	. . . . . . . . . . 11 ⊢ ((𝑃 ∈ Grp ∧ 𝐹 ∈ 𝐵 ∧ (𝐺 ∙ 𝑟) ∈ 𝐵) → (𝐹 − (𝐺 ∙ 𝑟)) ∈ 𝐵)
24	7, 9, 22, 23	syl3anc 1371	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐹 − (𝐺 ∙ 𝑟)) ∈ 𝐵)
25	13, 17	grpsubcl 18827	. . . . . . . . . 10 ⊢ ((𝑃 ∈ Grp ∧ (𝐹 − (𝐺 ∙ 𝑞)) ∈ 𝐵 ∧ (𝐹 − (𝐺 ∙ 𝑟)) ∈ 𝐵) → ((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟))) ∈ 𝐵)
26	7, 19, 24, 25	syl3anc 1371	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟))) ∈ 𝐵)
27		ply1divalg.d	. . . . . . . . . 10 ⊢ 𝐷 = ( deg₁ ‘𝑅)
28	27, 3, 13	deg1xrcl 25447	. . . . . . . . 9 ⊢ (((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟))) ∈ 𝐵 → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ∈ ℝ^*)
29	26, 28	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ∈ ℝ^*)
30	27, 3, 13	deg1xrcl 25447	. . . . . . . . . 10 ⊢ ((𝐹 − (𝐺 ∙ 𝑟)) ∈ 𝐵 → (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) ∈ ℝ^*)
31	24, 30	syl 17	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) ∈ ℝ^*)
32	27, 3, 13	deg1xrcl 25447	. . . . . . . . . 10 ⊢ ((𝐹 − (𝐺 ∙ 𝑞)) ∈ 𝐵 → (𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ∈ ℝ^*)
33	19, 32	syl 17	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ∈ ℝ^*)
34	31, 33	ifcld 4532	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) ∈ ℝ^*)
35	27, 3, 13	deg1xrcl 25447	. . . . . . . . 9 ⊢ (𝐺 ∈ 𝐵 → (𝐷‘𝐺) ∈ ℝ^*)
36	11, 35	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐷‘𝐺) ∈ ℝ^*)
37	29, 34, 36	3jca 1128	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ∈ ℝ^* ∧ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) ∈ ℝ^* ∧ (𝐷‘𝐺) ∈ ℝ^*))
38	37	adantr 481	. . . . . 6 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))) → ((𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ∈ ℝ^* ∧ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) ∈ ℝ^* ∧ (𝐷‘𝐺) ∈ ℝ^*))
39	3, 27, 2, 13, 17, 19, 24	deg1suble 25472	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ≤ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))))
40	39	adantr 481	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ≤ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))))
41		xrmaxlt 13100	. . . . . . . . 9 ⊢ (((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ∈ ℝ^* ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) ∈ ℝ^* ∧ (𝐷‘𝐺) ∈ ℝ^*) → (if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) < (𝐷‘𝐺) ↔ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))))
42	33, 31, 36, 41	syl3anc 1371	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) < (𝐷‘𝐺) ↔ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))))
43	42	biimpar 478	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))) → if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) < (𝐷‘𝐺))
44	40, 43	jca 512	. . . . . 6 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))) → ((𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ≤ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) ∧ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) < (𝐷‘𝐺)))
45		xrlelttr 13075	. . . . . 6 ⊢ (((𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ∈ ℝ^* ∧ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) ∈ ℝ^* ∧ (𝐷‘𝐺) ∈ ℝ^*) → (((𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ≤ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) ∧ if((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) ≤ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))), (𝐷‘(𝐹 − (𝐺 ∙ 𝑞)))) < (𝐷‘𝐺)) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺)))
46	38, 44, 45	sylc 65	. . . . 5 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺))) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺))
47	46	ex 413	. . . 4 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺)) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺)))
48		ply1divalg.g2	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐺 ≠ 0 )
49		ply1divalg.z	. . . . . . . . . . . . . 14 ⊢ 0 = (0_g‘𝑃)
50	27, 3, 49, 13	deg1nn0cl 25453	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ 𝐵 ∧ 𝐺 ≠ 0 ) → (𝐷‘𝐺) ∈ ℕ₀)
51	1, 10, 48, 50	syl3anc 1371	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐷‘𝐺) ∈ ℕ₀)
52	51	ad2antrr 724	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘𝐺) ∈ ℕ₀)
53	52	nn0red 12474	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘𝐺) ∈ ℝ)
54	1	ad2antrr 724	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → 𝑅 ∈ Ring)
55	13, 17	grpsubcl 18827	. . . . . . . . . . . . 13 ⊢ ((𝑃 ∈ Grp ∧ 𝑟 ∈ 𝐵 ∧ 𝑞 ∈ 𝐵) → (𝑟 − 𝑞) ∈ 𝐵)
56	7, 20, 12, 55	syl3anc 1371	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝑟 − 𝑞) ∈ 𝐵)
57	56	adantr 481	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝑟 − 𝑞) ∈ 𝐵)
58	13, 49, 17	grpsubeq0 18833	. . . . . . . . . . . . . . 15 ⊢ ((𝑃 ∈ Grp ∧ 𝑟 ∈ 𝐵 ∧ 𝑞 ∈ 𝐵) → ((𝑟 − 𝑞) = 0 ↔ 𝑟 = 𝑞))
59	7, 20, 12, 58	syl3anc 1371	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝑟 − 𝑞) = 0 ↔ 𝑟 = 𝑞))
60		equcom 2021	. . . . . . . . . . . . . 14 ⊢ (𝑟 = 𝑞 ↔ 𝑞 = 𝑟)
61	59, 60	bitrdi 286	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝑟 − 𝑞) = 0 ↔ 𝑞 = 𝑟))
62	61	necon3bid 2988	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝑟 − 𝑞) ≠ 0 ↔ 𝑞 ≠ 𝑟))
63	62	biimpar 478	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝑟 − 𝑞) ≠ 0 )
64	27, 3, 49, 13	deg1nn0cl 25453	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ (𝑟 − 𝑞) ∈ 𝐵 ∧ (𝑟 − 𝑞) ≠ 0 ) → (𝐷‘(𝑟 − 𝑞)) ∈ ℕ₀)
65	54, 57, 63, 64	syl3anc 1371	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘(𝑟 − 𝑞)) ∈ ℕ₀)
66		nn0addge1 12459	. . . . . . . . . 10 ⊢ (((𝐷‘𝐺) ∈ ℝ ∧ (𝐷‘(𝑟 − 𝑞)) ∈ ℕ₀) → (𝐷‘𝐺) ≤ ((𝐷‘𝐺) + (𝐷‘(𝑟 − 𝑞))))
67	53, 65, 66	syl2anc 584	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘𝐺) ≤ ((𝐷‘𝐺) + (𝐷‘(𝑟 − 𝑞))))
68		ply1divmo.e	. . . . . . . . . 10 ⊢ 𝐸 = (RLReg‘𝑅)
69	10	ad2antrr 724	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → 𝐺 ∈ 𝐵)
70	48	ad2antrr 724	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → 𝐺 ≠ 0 )
71		ply1divmo.g3	. . . . . . . . . . 11 ⊢ (𝜑 → ((coe₁‘𝐺)‘(𝐷‘𝐺)) ∈ 𝐸)
72	71	ad2antrr 724	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → ((coe₁‘𝐺)‘(𝐷‘𝐺)) ∈ 𝐸)
73	27, 3, 68, 13, 14, 49, 54, 69, 70, 72, 57, 63	deg1mul2 25479	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘(𝐺 ∙ (𝑟 − 𝑞))) = ((𝐷‘𝐺) + (𝐷‘(𝑟 − 𝑞))))
74	67, 73	breqtrrd 5133	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘𝐺) ≤ (𝐷‘(𝐺 ∙ (𝑟 − 𝑞))))
75		ringabl 20002	. . . . . . . . . . . . 13 ⊢ (𝑃 ∈ Ring → 𝑃 ∈ Abel)
76	5, 75	syl 17	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → 𝑃 ∈ Abel)
77	13, 17, 76, 9, 16, 22	ablnnncan1 19602	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟))) = ((𝐺 ∙ 𝑟) − (𝐺 ∙ 𝑞)))
78	13, 14, 17, 5, 11, 20, 12	ringsubdi 20023	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐺 ∙ (𝑟 − 𝑞)) = ((𝐺 ∙ 𝑟) − (𝐺 ∙ 𝑞)))
79	77, 78	eqtr4d 2779	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟))) = (𝐺 ∙ (𝑟 − 𝑞)))
80	79	fveq2d 6846	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) = (𝐷‘(𝐺 ∙ (𝑟 − 𝑞))))
81	80	adantr 481	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) = (𝐷‘(𝐺 ∙ (𝑟 − 𝑞))))
82	74, 81	breqtrrd 5133	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → (𝐷‘𝐺) ≤ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))))
83	36, 29	xrlenltd 11221	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝐷‘𝐺) ≤ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ↔ ¬ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺)))
84	83	adantr 481	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → ((𝐷‘𝐺) ≤ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) ↔ ¬ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺)))
85	82, 84	mpbid 231	. . . . . 6 ⊢ (((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) ∧ 𝑞 ≠ 𝑟) → ¬ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺))
86	85	ex 413	. . . . 5 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (𝑞 ≠ 𝑟 → ¬ (𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺)))
87	86	necon4ad 2962	. . . 4 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → ((𝐷‘((𝐹 − (𝐺 ∙ 𝑞)) − (𝐹 − (𝐺 ∙ 𝑟)))) < (𝐷‘𝐺) → 𝑞 = 𝑟))
88	47, 87	syld 47	. . 3 ⊢ ((𝜑 ∧ (𝑞 ∈ 𝐵 ∧ 𝑟 ∈ 𝐵)) → (((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺)) → 𝑞 = 𝑟))
89	88	ralrimivva 3197	. 2 ⊢ (𝜑 → ∀𝑞 ∈ 𝐵 ∀𝑟 ∈ 𝐵 (((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺)) → 𝑞 = 𝑟))
90		oveq2 7365	. . . . . 6 ⊢ (𝑞 = 𝑟 → (𝐺 ∙ 𝑞) = (𝐺 ∙ 𝑟))
91	90	oveq2d 7373	. . . . 5 ⊢ (𝑞 = 𝑟 → (𝐹 − (𝐺 ∙ 𝑞)) = (𝐹 − (𝐺 ∙ 𝑟)))
92	91	fveq2d 6846	. . . 4 ⊢ (𝑞 = 𝑟 → (𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) = (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))))
93	92	breq1d 5115	. . 3 ⊢ (𝑞 = 𝑟 → ((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ↔ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺)))
94	93	rmo4 3688	. 2 ⊢ (∃*𝑞 ∈ 𝐵 (𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ↔ ∀𝑞 ∈ 𝐵 ∀𝑟 ∈ 𝐵 (((𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺) ∧ (𝐷‘(𝐹 − (𝐺 ∙ 𝑟))) < (𝐷‘𝐺)) → 𝑞 = 𝑟))
95	89, 94	sylibr 233	1 ⊢ (𝜑 → ∃*𝑞 ∈ 𝐵 (𝐷‘(𝐹 − (𝐺 ∙ 𝑞))) < (𝐷‘𝐺))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2943 ∀wral 3064 ∃*wrmo 3352 ifcif 4486 class class class wbr 5105 ‘cfv 6496 (class class class)co 7357 ℝcr 11050 + caddc 11054 ℝ^*cxr 11188 < clt 11189 ≤ cle 11190 ℕ₀cn0 12413 Basecbs 17083 ._rcmulr 17134 0_gc0g 17321 Grpcgrp 18748 -_gcsg 18750 Abelcabl 19563 Ringcrg 19964 RLRegcrlreg 20749 Poly₁cpl1 21548 coe₁cco1 21549 deg₁ cdg1 25416

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-rep 5242 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7672 ax-cnex 11107 ax-resscn 11108 ax-1cn 11109 ax-icn 11110 ax-addcl 11111 ax-addrcl 11112 ax-mulcl 11113 ax-mulrcl 11114 ax-mulcom 11115 ax-addass 11116 ax-mulass 11117 ax-distr 11118 ax-i2m1 11119 ax-1ne0 11120 ax-1rid 11121 ax-rnegex 11122 ax-rrecex 11123 ax-cnre 11124 ax-pre-lttri 11125 ax-pre-lttrn 11126 ax-pre-ltadd 11127 ax-pre-mulgt0 11128 ax-pre-sup 11129 ax-addf 11130 ax-mulf 11131

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-rmo 3353 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-tp 4591 df-op 4593 df-uni 4866 df-int 4908 df-iun 4956 df-iin 4957 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-se 5589 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-isom 6505 df-riota 7313 df-ov 7360 df-oprab 7361 df-mpo 7362 df-of 7617 df-ofr 7618 df-om 7803 df-1st 7921 df-2nd 7922 df-supp 8093 df-tpos 8157 df-frecs 8212 df-wrecs 8243 df-recs 8317 df-rdg 8356 df-1o 8412 df-er 8648 df-map 8767 df-pm 8768 df-ixp 8836 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 df-fsupp 9306 df-sup 9378 df-oi 9446 df-card 9875 df-pnf 11191 df-mnf 11192 df-xr 11193 df-ltxr 11194 df-le 11195 df-sub 11387 df-neg 11388 df-nn 12154 df-2 12216 df-3 12217 df-4 12218 df-5 12219 df-6 12220 df-7 12221 df-8 12222 df-9 12223 df-n0 12414 df-z 12500 df-dec 12619 df-uz 12764 df-fz 13425 df-fzo 13568 df-seq 13907 df-hash 14231 df-struct 17019 df-sets 17036 df-slot 17054 df-ndx 17066 df-base 17084 df-ress 17113 df-plusg 17146 df-mulr 17147 df-starv 17148 df-sca 17149 df-vsca 17150 df-ip 17151 df-tset 17152 df-ple 17153 df-ds 17155 df-unif 17156 df-hom 17157 df-cco 17158 df-0g 17323 df-gsum 17324 df-prds 17329 df-pws 17331 df-mre 17466 df-mrc 17467 df-acs 17469 df-mgm 18497 df-sgrp 18546 df-mnd 18557 df-mhm 18601 df-submnd 18602 df-grp 18751 df-minusg 18752 df-sbg 18753 df-mulg 18873 df-subg 18925 df-ghm 19006 df-cntz 19097 df-cmn 19564 df-abl 19565 df-mgp 19897 df-ur 19914 df-ring 19966 df-cring 19967 df-oppr 20049 df-dvdsr 20070 df-unit 20071 df-invr 20101 df-subrg 20220 df-lmod 20324 df-lss 20393 df-rlreg 20753 df-cnfld 20797 df-psr 21311 df-mpl 21313 df-opsr 21315 df-psr1 21551 df-ply1 21553 df-coe1 21554 df-mdeg 25417 df-deg1 25418

This theorem is referenced by: ply1divalg 25502

W3C validator