tdeglem4OLD - Metamath Proof Explorer

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Theorem tdeglem4OLD 25577

Description: Obsolete version of tdeglem4 25576 as of 7-Aug-2024. (Contributed by Stefan O'Rear, 29-Mar-2015.) (New usage is discouraged.) (Proof modification is discouraged.)

**Hypotheses**
Ref	Expression
tdeglem.a	⊢ 𝐴 = {𝑚 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑚 “ ℕ) ∈ Fin}
tdeglem.h	⊢ 𝐻 = (ℎ ∈ 𝐴 ↦ (ℂ_fld Σ_g ℎ))

**Assertion**
Ref	Expression
tdeglem4OLD	⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → ((𝐻‘𝑋) = 0 ↔ 𝑋 = (𝐼 × {0})))

Distinct variable groups: 𝐴,ℎ ℎ,𝐼,𝑚 ℎ,𝑉 ℎ,𝑋,𝑚 Allowed substitution hints: 𝐴(𝑚) 𝐻(ℎ,𝑚) 𝑉(𝑚)

Proof of Theorem tdeglem4OLD Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		rexnal 3100	. . . . 5 ⊢ (∃𝑥 ∈ 𝐼 ¬ (𝑋‘𝑥) = 0 ↔ ¬ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0)
2		df-ne 2941	. . . . . . 7 ⊢ ((𝑋‘𝑥) ≠ 0 ↔ ¬ (𝑋‘𝑥) = 0)
3		oveq2 7416	. . . . . . . . . . . 12 ⊢ (ℎ = 𝑋 → (ℂ_fld Σ_g ℎ) = (ℂ_fld Σ_g 𝑋))
4		tdeglem.h	. . . . . . . . . . . 12 ⊢ 𝐻 = (ℎ ∈ 𝐴 ↦ (ℂ_fld Σ_g ℎ))
5		ovex 7441	. . . . . . . . . . . 12 ⊢ (ℂ_fld Σ_g 𝑋) ∈ V
6	3, 4, 5	fvmpt 6998	. . . . . . . . . . 11 ⊢ (𝑋 ∈ 𝐴 → (𝐻‘𝑋) = (ℂ_fld Σ_g 𝑋))
7	6	ad2antlr 725	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝐻‘𝑋) = (ℂ_fld Σ_g 𝑋))
8		tdeglem.a	. . . . . . . . . . . . . 14 ⊢ 𝐴 = {𝑚 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑚 “ ℕ) ∈ Fin}
9	8	psrbagfOLD 21471	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋:𝐼⟶ℕ₀)
10	9	feqmptd 6960	. . . . . . . . . . . 12 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋 = (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)))
11	10	adantr 481	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑋 = (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)))
12	11	oveq2d 7424	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g 𝑋) = (ℂ_fld Σ_g (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))))
13		cnfldbas 20947	. . . . . . . . . . 11 ⊢ ℂ = (Base‘ℂ_fld)
14		cnfld0 20968	. . . . . . . . . . 11 ⊢ 0 = (0_g‘ℂ_fld)
15		cnfldadd 20948	. . . . . . . . . . 11 ⊢ + = (+_g‘ℂ_fld)
16		cnring 20966	. . . . . . . . . . . 12 ⊢ ℂ_fld ∈ Ring
17		ringcmn 20098	. . . . . . . . . . . 12 ⊢ (ℂ_fld ∈ Ring → ℂ_fld ∈ CMnd)
18	16, 17	mp1i 13	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ℂ_fld ∈ CMnd)
19		simpll 765	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝐼 ∈ 𝑉)
20	9	adantr 481	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑋:𝐼⟶ℕ₀)
21	20	ffvelcdmda 7086	. . . . . . . . . . . 12 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) ∧ 𝑦 ∈ 𝐼) → (𝑋‘𝑦) ∈ ℕ₀)
22	21	nn0cnd 12533	. . . . . . . . . . 11 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) ∧ 𝑦 ∈ 𝐼) → (𝑋‘𝑦) ∈ ℂ)
23	8	psrbagfsuppOLD 21473	. . . . . . . . . . . . . 14 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝐼 ∈ 𝑉) → 𝑋 finSupp 0)
24	23	ancoms 459	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋 finSupp 0)
25	24	adantr 481	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑋 finSupp 0)
26	11, 25	eqbrtrrd 5172	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) finSupp 0)
27		incom 4201	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∖ {𝑥}) ∩ {𝑥}) = ({𝑥} ∩ (𝐼 ∖ {𝑥}))
28		disjdif 4471	. . . . . . . . . . . . 13 ⊢ ({𝑥} ∩ (𝐼 ∖ {𝑥})) = ∅
29	27, 28	eqtri 2760	. . . . . . . . . . . 12 ⊢ ((𝐼 ∖ {𝑥}) ∩ {𝑥}) = ∅
30	29	a1i 11	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ((𝐼 ∖ {𝑥}) ∩ {𝑥}) = ∅)
31		difsnid 4813	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ 𝐼 → ((𝐼 ∖ {𝑥}) ∪ {𝑥}) = 𝐼)
32	31	eqcomd 2738	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ 𝐼 → 𝐼 = ((𝐼 ∖ {𝑥}) ∪ {𝑥}))
33	32	ad2antrl 726	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝐼 = ((𝐼 ∖ {𝑥}) ∪ {𝑥}))
34	13, 14, 15, 18, 19, 22, 26, 30, 33	gsumsplit2 19796	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))) = ((ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) + (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦)))))
35	7, 12, 34	3eqtrd 2776	. . . . . . . . 9 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝐻‘𝑋) = ((ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) + (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦)))))
36		difexg 5327	. . . . . . . . . . . . 13 ⊢ (𝐼 ∈ 𝑉 → (𝐼 ∖ {𝑥}) ∈ V)
37	36	ad2antrr 724	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝐼 ∖ {𝑥}) ∈ V)
38		nn0subm 20999	. . . . . . . . . . . . 13 ⊢ ℕ₀ ∈ (SubMnd‘ℂ_fld)
39	38	a1i 11	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ℕ₀ ∈ (SubMnd‘ℂ_fld))
40		eldifi 4126	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ (𝐼 ∖ {𝑥}) → 𝑦 ∈ 𝐼)
41		ffvelcdm 7083	. . . . . . . . . . . . . 14 ⊢ ((𝑋:𝐼⟶ℕ₀ ∧ 𝑦 ∈ 𝐼) → (𝑋‘𝑦) ∈ ℕ₀)
42	20, 40, 41	syl2an 596	. . . . . . . . . . . . 13 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) ∧ 𝑦 ∈ (𝐼 ∖ {𝑥})) → (𝑋‘𝑦) ∈ ℕ₀)
43	42	fmpttd 7114	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)):(𝐼 ∖ {𝑥})⟶ℕ₀)
44	36	mptexd 7225	. . . . . . . . . . . . . 14 ⊢ (𝐼 ∈ 𝑉 → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ∈ V)
45	44	ad2antrr 724	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ∈ V)
46		funmpt 6586	. . . . . . . . . . . . . 14 ⊢ Fun (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))
47	46	a1i 11	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → Fun (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)))
48		funmpt 6586	. . . . . . . . . . . . . 14 ⊢ Fun (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))
49		difss 4131	. . . . . . . . . . . . . . . 16 ⊢ (𝐼 ∖ {𝑥}) ⊆ 𝐼
50		resmpt 6037	. . . . . . . . . . . . . . . 16 ⊢ ((𝐼 ∖ {𝑥}) ⊆ 𝐼 → ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ↾ (𝐼 ∖ {𝑥})) = (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)))
51	49, 50	ax-mp 5	. . . . . . . . . . . . . . 15 ⊢ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ↾ (𝐼 ∖ {𝑥})) = (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))
52		resss 6006	. . . . . . . . . . . . . . 15 ⊢ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ↾ (𝐼 ∖ {𝑥})) ⊆ (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))
53	51, 52	eqsstrri 4017	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ⊆ (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))
54		mptexg 7222	. . . . . . . . . . . . . . 15 ⊢ (𝐼 ∈ 𝑉 → (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∈ V)
55	54	ad2antrr 724	. . . . . . . . . . . . . 14 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∈ V)
56		funsssuppss 8174	. . . . . . . . . . . . . 14 ⊢ ((Fun (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∧ (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ⊆ (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∧ (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∈ V) → ((𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) supp 0) ⊆ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) supp 0))
57	48, 53, 55, 56	mp3an12i 1465	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ((𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) supp 0) ⊆ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) supp 0))
58		fsuppsssupp 9378	. . . . . . . . . . . . 13 ⊢ ((((𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ∈ V ∧ Fun (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) ∧ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) finSupp 0 ∧ ((𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) supp 0) ⊆ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) supp 0))) → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) finSupp 0)
59	45, 47, 26, 57, 58	syl22anc 837	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) finSupp 0)
60	14, 18, 37, 39, 43, 59	gsumsubmcl 19786	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) ∈ ℕ₀)
61		ringmnd 20065	. . . . . . . . . . . . . 14 ⊢ (ℂ_fld ∈ Ring → ℂ_fld ∈ Mnd)
62	16, 61	mp1i 13	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ℂ_fld ∈ Mnd)
63		simprl 769	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑥 ∈ 𝐼)
64	20, 63	ffvelcdmd 7087	. . . . . . . . . . . . . 14 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑋‘𝑥) ∈ ℕ₀)
65	64	nn0cnd 12533	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑋‘𝑥) ∈ ℂ)
66		fveq2 6891	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑥 → (𝑋‘𝑦) = (𝑋‘𝑥))
67	13, 66	gsumsn 19821	. . . . . . . . . . . . 13 ⊢ ((ℂ_fld ∈ Mnd ∧ 𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ∈ ℂ) → (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦))) = (𝑋‘𝑥))
68	62, 63, 65, 67	syl3anc 1371	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦))) = (𝑋‘𝑥))
69		simprr 771	. . . . . . . . . . . . . 14 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑋‘𝑥) ≠ 0)
70	69, 2	sylib 217	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ¬ (𝑋‘𝑥) = 0)
71		elnn0 12473	. . . . . . . . . . . . . 14 ⊢ ((𝑋‘𝑥) ∈ ℕ₀ ↔ ((𝑋‘𝑥) ∈ ℕ ∨ (𝑋‘𝑥) = 0))
72	64, 71	sylib 217	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ((𝑋‘𝑥) ∈ ℕ ∨ (𝑋‘𝑥) = 0))
73		orel2 889	. . . . . . . . . . . . 13 ⊢ (¬ (𝑋‘𝑥) = 0 → (((𝑋‘𝑥) ∈ ℕ ∨ (𝑋‘𝑥) = 0) → (𝑋‘𝑥) ∈ ℕ))
74	70, 72, 73	sylc 65	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑋‘𝑥) ∈ ℕ)
75	68, 74	eqeltrd 2833	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦))) ∈ ℕ)
76		nn0nnaddcl 12502	. . . . . . . . . . 11 ⊢ (((ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) ∈ ℕ₀ ∧ (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦))) ∈ ℕ) → ((ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) + (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦)))) ∈ ℕ)
77	60, 75, 76	syl2anc 584	. . . . . . . . . 10 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ((ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) + (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦)))) ∈ ℕ)
78	77	nnne0d 12261	. . . . . . . . 9 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ((ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) + (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦)))) ≠ 0)
79	35, 78	eqnetrd 3008	. . . . . . . 8 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝐻‘𝑋) ≠ 0)
80	79	expr 457	. . . . . . 7 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ 𝑥 ∈ 𝐼) → ((𝑋‘𝑥) ≠ 0 → (𝐻‘𝑋) ≠ 0))
81	2, 80	biimtrrid 242	. . . . . 6 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ 𝑥 ∈ 𝐼) → (¬ (𝑋‘𝑥) = 0 → (𝐻‘𝑋) ≠ 0))
82	81	rexlimdva 3155	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (∃𝑥 ∈ 𝐼 ¬ (𝑋‘𝑥) = 0 → (𝐻‘𝑋) ≠ 0))
83	1, 82	biimtrrid 242	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (¬ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0 → (𝐻‘𝑋) ≠ 0))
84	83	necon4bd 2960	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → ((𝐻‘𝑋) = 0 → ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0))
85	9	ffnd 6718	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋 Fn 𝐼)
86		0nn0 12486	. . . . . 6 ⊢ 0 ∈ ℕ₀
87		fnconstg 6779	. . . . . 6 ⊢ (0 ∈ ℕ₀ → (𝐼 × {0}) Fn 𝐼)
88	86, 87	mp1i 13	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐼 × {0}) Fn 𝐼)
89		eqfnfv 7032	. . . . 5 ⊢ ((𝑋 Fn 𝐼 ∧ (𝐼 × {0}) Fn 𝐼) → (𝑋 = (𝐼 × {0}) ↔ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = ((𝐼 × {0})‘𝑥)))
90	85, 88, 89	syl2anc 584	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝑋 = (𝐼 × {0}) ↔ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = ((𝐼 × {0})‘𝑥)))
91		c0ex 11207	. . . . . . 7 ⊢ 0 ∈ V
92	91	fvconst2 7204	. . . . . 6 ⊢ (𝑥 ∈ 𝐼 → ((𝐼 × {0})‘𝑥) = 0)
93	92	eqeq2d 2743	. . . . 5 ⊢ (𝑥 ∈ 𝐼 → ((𝑋‘𝑥) = ((𝐼 × {0})‘𝑥) ↔ (𝑋‘𝑥) = 0))
94	93	ralbiia 3091	. . . 4 ⊢ (∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = ((𝐼 × {0})‘𝑥) ↔ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0)
95	90, 94	bitrdi 286	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝑋 = (𝐼 × {0}) ↔ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0))
96	84, 95	sylibrd 258	. 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → ((𝐻‘𝑋) = 0 → 𝑋 = (𝐼 × {0})))
97	8	psrbag0 21622	. . . . . 6 ⊢ (𝐼 ∈ 𝑉 → (𝐼 × {0}) ∈ 𝐴)
98	97	adantr 481	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐼 × {0}) ∈ 𝐴)
99		oveq2 7416	. . . . . 6 ⊢ (ℎ = (𝐼 × {0}) → (ℂ_fld Σ_g ℎ) = (ℂ_fld Σ_g (𝐼 × {0})))
100		ovex 7441	. . . . . 6 ⊢ (ℂ_fld Σ_g (𝐼 × {0})) ∈ V
101	99, 4, 100	fvmpt 6998	. . . . 5 ⊢ ((𝐼 × {0}) ∈ 𝐴 → (𝐻‘(𝐼 × {0})) = (ℂ_fld Σ_g (𝐼 × {0})))
102	98, 101	syl 17	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐻‘(𝐼 × {0})) = (ℂ_fld Σ_g (𝐼 × {0})))
103		fconstmpt 5738	. . . . . 6 ⊢ (𝐼 × {0}) = (𝑥 ∈ 𝐼 ↦ 0)
104	103	oveq2i 7419	. . . . 5 ⊢ (ℂ_fld Σ_g (𝐼 × {0})) = (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0))
105	16, 61	ax-mp 5	. . . . . . 7 ⊢ ℂ_fld ∈ Mnd
106	14	gsumz 18716	. . . . . . 7 ⊢ ((ℂ_fld ∈ Mnd ∧ 𝐼 ∈ 𝑉) → (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0)) = 0)
107	105, 106	mpan 688	. . . . . 6 ⊢ (𝐼 ∈ 𝑉 → (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0)) = 0)
108	107	adantr 481	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0)) = 0)
109	104, 108	eqtrid 2784	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (ℂ_fld Σ_g (𝐼 × {0})) = 0)
110	102, 109	eqtrd 2772	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐻‘(𝐼 × {0})) = 0)
111		fveqeq2 6900	. . 3 ⊢ (𝑋 = (𝐼 × {0}) → ((𝐻‘𝑋) = 0 ↔ (𝐻‘(𝐼 × {0})) = 0))
112	110, 111	syl5ibrcom 246	. 2 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝑋 = (𝐼 × {0}) → (𝐻‘𝑋) = 0))
113	96, 112	impbid 211	1 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → ((𝐻‘𝑋) = 0 ↔ 𝑋 = (𝐼 × {0})))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∨ wo 845 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∃wrex 3070 {crab 3432 Vcvv 3474 ∖ cdif 3945 ∪ cun 3946 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 {csn 4628 class class class wbr 5148 ↦ cmpt 5231 × cxp 5674 ^◡ccnv 5675 ↾ cres 5678 “ cima 5679 Fun wfun 6537 Fn wfn 6538 ⟶wf 6539 ‘cfv 6543 (class class class)co 7408 supp csupp 8145 ↑_m cmap 8819 Fincfn 8938 finSupp cfsupp 9360 ℂcc 11107 0cc0 11109 + caddc 11112 ℕcn 12211 ℕ₀cn0 12471 Σ_g cgsu 17385 Mndcmnd 18624 SubMndcsubmnd 18669 CMndccmn 19647 Ringcrg 20055 ℂ_fldccnfld 20943

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 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-addf 11188 ax-mulf 11189

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 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-iin 5000 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-of 7669 df-om 7855 df-1st 7974 df-2nd 7975 df-supp 8146 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-er 8702 df-map 8821 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-fsupp 9361 df-oi 9504 df-card 9933 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-nn 12212 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12472 df-z 12558 df-dec 12677 df-uz 12822 df-fz 13484 df-fzo 13627 df-seq 13966 df-hash 14290 df-struct 17079 df-sets 17096 df-slot 17114 df-ndx 17126 df-base 17144 df-ress 17173 df-plusg 17209 df-mulr 17210 df-starv 17211 df-tset 17215 df-ple 17216 df-ds 17218 df-unif 17219 df-0g 17386 df-gsum 17387 df-mre 17529 df-mrc 17530 df-acs 17532 df-mgm 18560 df-sgrp 18609 df-mnd 18625 df-submnd 18671 df-grp 18821 df-minusg 18822 df-mulg 18950 df-cntz 19180 df-cmn 19649 df-abl 19650 df-mgp 19987 df-ur 20004 df-ring 20057 df-cring 20058 df-cnfld 20944

This theorem is referenced by: (None)

W3C validator