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Theorem tdeglem4OLD 25813

Description: Obsolete version of tdeglem4 25812 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 3098	. . . . 5 ⊢ (∃𝑥 ∈ 𝐼 ¬ (𝑋‘𝑥) = 0 ↔ ¬ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0)
2		df-ne 2939	. . . . . . 7 ⊢ ((𝑋‘𝑥) ≠ 0 ↔ ¬ (𝑋‘𝑥) = 0)
3		oveq2 7419	. . . . . . . . . . . 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 7444	. . . . . . . . . . . 12 ⊢ (ℂ_fld Σ_g 𝑋) ∈ V
6	3, 4, 5	fvmpt 6997	. . . . . . . . . . 11 ⊢ (𝑋 ∈ 𝐴 → (𝐻‘𝑋) = (ℂ_fld Σ_g 𝑋))
7	6	ad2antlr 723	. . . . . . . . . 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 21691	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋:𝐼⟶ℕ₀)
10	9	feqmptd 6959	. . . . . . . . . . . 12 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋 = (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)))
11	10	adantr 479	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑋 = (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)))
12	11	oveq2d 7427	. . . . . . . . . 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 21148	. . . . . . . . . . 11 ⊢ ℂ = (Base‘ℂ_fld)
14		cnfld0 21169	. . . . . . . . . . 11 ⊢ 0 = (0_g‘ℂ_fld)
15		cnfldadd 21149	. . . . . . . . . . 11 ⊢ + = (+_g‘ℂ_fld)
16		cnring 21167	. . . . . . . . . . . 12 ⊢ ℂ_fld ∈ Ring
17		ringcmn 20170	. . . . . . . . . . . 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 763	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝐼 ∈ 𝑉)
20	9	adantr 479	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑋:𝐼⟶ℕ₀)
21	20	ffvelcdmda 7085	. . . . . . . . . . . 12 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) ∧ 𝑦 ∈ 𝐼) → (𝑋‘𝑦) ∈ ℕ₀)
22	21	nn0cnd 12538	. . . . . . . . . . 11 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) ∧ 𝑦 ∈ 𝐼) → (𝑋‘𝑦) ∈ ℂ)
23	8	psrbagfsuppOLD 21693	. . . . . . . . . . . . . 14 ⊢ ((𝑋 ∈ 𝐴 ∧ 𝐼 ∈ 𝑉) → 𝑋 finSupp 0)
24	23	ancoms 457	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋 finSupp 0)
25	24	adantr 479	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑋 finSupp 0)
26	11, 25	eqbrtrrd 5171	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) finSupp 0)
27		incom 4200	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∖ {𝑥}) ∩ {𝑥}) = ({𝑥} ∩ (𝐼 ∖ {𝑥}))
28		disjdif 4470	. . . . . . . . . . . . 13 ⊢ ({𝑥} ∩ (𝐼 ∖ {𝑥})) = ∅
29	27, 28	eqtri 2758	. . . . . . . . . . . 12 ⊢ ((𝐼 ∖ {𝑥}) ∩ {𝑥}) = ∅
30	29	a1i 11	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → ((𝐼 ∖ {𝑥}) ∩ {𝑥}) = ∅)
31		difsnid 4812	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ 𝐼 → ((𝐼 ∖ {𝑥}) ∪ {𝑥}) = 𝐼)
32	31	eqcomd 2736	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ 𝐼 → 𝐼 = ((𝐼 ∖ {𝑥}) ∪ {𝑥}))
33	32	ad2antrl 724	. . . . . . . . . . 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 19838	. . . . . . . . . 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 2774	. . . . . . . . 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 5326	. . . . . . . . . . . . 13 ⊢ (𝐼 ∈ 𝑉 → (𝐼 ∖ {𝑥}) ∈ V)
37	36	ad2antrr 722	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝐼 ∖ {𝑥}) ∈ V)
38		nn0subm 21200	. . . . . . . . . . . . 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 4125	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ (𝐼 ∖ {𝑥}) → 𝑦 ∈ 𝐼)
41		ffvelcdm 7082	. . . . . . . . . . . . . 14 ⊢ ((𝑋:𝐼⟶ℕ₀ ∧ 𝑦 ∈ 𝐼) → (𝑋‘𝑦) ∈ ℕ₀)
42	20, 40, 41	syl2an 594	. . . . . . . . . . . . 13 ⊢ ((((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) ∧ 𝑦 ∈ (𝐼 ∖ {𝑥})) → (𝑋‘𝑦) ∈ ℕ₀)
43	42	fmpttd 7115	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)):(𝐼 ∖ {𝑥})⟶ℕ₀)
44	36	mptexd 7227	. . . . . . . . . . . . . 14 ⊢ (𝐼 ∈ 𝑉 → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ∈ V)
45	44	ad2antrr 722	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ∈ V)
46		funmpt 6585	. . . . . . . . . . . . . 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 6585	. . . . . . . . . . . . . 14 ⊢ Fun (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))
49		difss 4130	. . . . . . . . . . . . . . . 16 ⊢ (𝐼 ∖ {𝑥}) ⊆ 𝐼
50		resmpt 6036	. . . . . . . . . . . . . . . 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 6005	. . . . . . . . . . . . . . 15 ⊢ ((𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ↾ (𝐼 ∖ {𝑥})) ⊆ (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))
53	51, 52	eqsstrri 4016	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦)) ⊆ (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦))
54		mptexg 7224	. . . . . . . . . . . . . . 15 ⊢ (𝐼 ∈ 𝑉 → (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∈ V)
55	54	ad2antrr 722	. . . . . . . . . . . . . 14 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑦 ∈ 𝐼 ↦ (𝑋‘𝑦)) ∈ V)
56		funsssuppss 8177	. . . . . . . . . . . . . 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 1463	. . . . . . . . . . . . 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 9381	. . . . . . . . . . . . 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 835	. . . . . . . . . . . 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 19828	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ (𝐼 ∖ {𝑥}) ↦ (𝑋‘𝑦))) ∈ ℕ₀)
61		ringmnd 20137	. . . . . . . . . . . . . 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 767	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → 𝑥 ∈ 𝐼)
64	20, 63	ffvelcdmd 7086	. . . . . . . . . . . . . 14 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑋‘𝑥) ∈ ℕ₀)
65	64	nn0cnd 12538	. . . . . . . . . . . . 13 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝑋‘𝑥) ∈ ℂ)
66		fveq2 6890	. . . . . . . . . . . . . 14 ⊢ (𝑦 = 𝑥 → (𝑋‘𝑦) = (𝑋‘𝑥))
67	13, 66	gsumsn 19863	. . . . . . . . . . . . 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 1369	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦))) = (𝑋‘𝑥))
69		simprr 769	. . . . . . . . . . . . . 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 12478	. . . . . . . . . . . . . 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 887	. . . . . . . . . . . . 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 2831	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (ℂ_fld Σ_g (𝑦 ∈ {𝑥} ↦ (𝑋‘𝑦))) ∈ ℕ)
76		nn0nnaddcl 12507	. . . . . . . . . . 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 582	. . . . . . . . . 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 12266	. . . . . . . . 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 3006	. . . . . . . 8 ⊢ (((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) ∧ (𝑥 ∈ 𝐼 ∧ (𝑋‘𝑥) ≠ 0)) → (𝐻‘𝑋) ≠ 0)
80	79	expr 455	. . . . . . 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 3153	. . . . 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 2958	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → ((𝐻‘𝑋) = 0 → ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = 0))
85	9	ffnd 6717	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → 𝑋 Fn 𝐼)
86		0nn0 12491	. . . . . 6 ⊢ 0 ∈ ℕ₀
87		fnconstg 6778	. . . . . 6 ⊢ (0 ∈ ℕ₀ → (𝐼 × {0}) Fn 𝐼)
88	86, 87	mp1i 13	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐼 × {0}) Fn 𝐼)
89		eqfnfv 7031	. . . . 5 ⊢ ((𝑋 Fn 𝐼 ∧ (𝐼 × {0}) Fn 𝐼) → (𝑋 = (𝐼 × {0}) ↔ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = ((𝐼 × {0})‘𝑥)))
90	85, 88, 89	syl2anc 582	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝑋 = (𝐼 × {0}) ↔ ∀𝑥 ∈ 𝐼 (𝑋‘𝑥) = ((𝐼 × {0})‘𝑥)))
91		c0ex 11212	. . . . . . 7 ⊢ 0 ∈ V
92	91	fvconst2 7206	. . . . . 6 ⊢ (𝑥 ∈ 𝐼 → ((𝐼 × {0})‘𝑥) = 0)
93	92	eqeq2d 2741	. . . . 5 ⊢ (𝑥 ∈ 𝐼 → ((𝑋‘𝑥) = ((𝐼 × {0})‘𝑥) ↔ (𝑋‘𝑥) = 0))
94	93	ralbiia 3089	. . . 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 21842	. . . . . 6 ⊢ (𝐼 ∈ 𝑉 → (𝐼 × {0}) ∈ 𝐴)
98	97	adantr 479	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐼 × {0}) ∈ 𝐴)
99		oveq2 7419	. . . . . 6 ⊢ (ℎ = (𝐼 × {0}) → (ℂ_fld Σ_g ℎ) = (ℂ_fld Σ_g (𝐼 × {0})))
100		ovex 7444	. . . . . 6 ⊢ (ℂ_fld Σ_g (𝐼 × {0})) ∈ V
101	99, 4, 100	fvmpt 6997	. . . . 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 5737	. . . . . 6 ⊢ (𝐼 × {0}) = (𝑥 ∈ 𝐼 ↦ 0)
104	103	oveq2i 7422	. . . . 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 18753	. . . . . . 7 ⊢ ((ℂ_fld ∈ Mnd ∧ 𝐼 ∈ 𝑉) → (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0)) = 0)
107	105, 106	mpan 686	. . . . . 6 ⊢ (𝐼 ∈ 𝑉 → (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0)) = 0)
108	107	adantr 479	. . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (ℂ_fld Σ_g (𝑥 ∈ 𝐼 ↦ 0)) = 0)
109	104, 108	eqtrid 2782	. . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (ℂ_fld Σ_g (𝐼 × {0})) = 0)
110	102, 109	eqtrd 2770	. . 3 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑋 ∈ 𝐴) → (𝐻‘(𝐼 × {0})) = 0)
111		fveqeq2 6899	. . 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 394 ∨ wo 843 = wceq 1539 ∈ wcel 2104 ≠ wne 2938 ∀wral 3059 ∃wrex 3068 {crab 3430 Vcvv 3472 ∖ cdif 3944 ∪ cun 3945 ∩ cin 3946 ⊆ wss 3947 ∅c0 4321 {csn 4627 class class class wbr 5147 ↦ cmpt 5230 × cxp 5673 ^◡ccnv 5674 ↾ cres 5677 “ cima 5678 Fun wfun 6536 Fn wfn 6537 ⟶wf 6538 ‘cfv 6542 (class class class)co 7411 supp csupp 8148 ↑_m cmap 8822 Fincfn 8941 finSupp cfsupp 9363 ℂcc 11110 0cc0 11112 + caddc 11115 ℕcn 12216 ℕ₀cn0 12476 Σ_g cgsu 17390 Mndcmnd 18659 SubMndcsubmnd 18704 CMndccmn 19689 Ringcrg 20127 ℂ_fldccnfld 21144

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-addf 11191 ax-mulf 11192

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-tp 4632 df-op 4634 df-uni 4908 df-int 4950 df-iun 4998 df-iin 4999 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-isom 6551 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-supp 8149 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-oi 9507 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-fz 13489 df-fzo 13632 df-seq 13971 df-hash 14295 df-struct 17084 df-sets 17101 df-slot 17119 df-ndx 17131 df-base 17149 df-ress 17178 df-plusg 17214 df-mulr 17215 df-starv 17216 df-tset 17220 df-ple 17221 df-ds 17223 df-unif 17224 df-0g 17391 df-gsum 17392 df-mre 17534 df-mrc 17535 df-acs 17537 df-mgm 18565 df-sgrp 18644 df-mnd 18660 df-submnd 18706 df-grp 18858 df-minusg 18859 df-mulg 18987 df-cntz 19222 df-cmn 19691 df-abl 19692 df-mgp 20029 df-ur 20076 df-ring 20129 df-cring 20130 df-cnfld 21145

This theorem is referenced by: (None)

W3C validator