Theorem domnprodeq0 33357

Description: A product over a domain is zero exactly when one of the factors is zero. Generalization of domneq0 20680 for any number of factors. See also domnprodn0 33356. (Contributed by Thierry Arnoux, 15-Feb-2026.)

Hypotheses

Ref	Expression
domnprodeq0.m	⊢ 𝑀 = (mulGrp‘𝑅)
domnprodeq0.b	⊢ 𝐵 = (Base‘𝑅)
domnprodeq0.1	⊢ 0 = (0g‘𝑅)
domnprodeq0.r	⊢ (𝜑 → 𝑅 ∈ IDomn)
domnprodeq0.2	⊢ (𝜑 → 𝐴 ∈ Fin)
domnprodeq0.f	⊢ (𝜑 → 𝐹:𝐴⟶𝐵)

Assertion

Ref	Expression
domnprodeq0	⊢ (𝜑 → ((𝑀 Σg 𝐹) = 0 ↔ 0 ∈ ran 𝐹))

Proof of Theorem domnprodeq0

Dummy variables 𝑎 𝑏 𝑘 𝑙 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mpteq1 5161	. . . . . . 7 ⊢ (𝑎 = ∅ → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ ∅ ↦ (𝐹‘𝑘)))
2		mpt0 6627	. . . . . . 7 ⊢ (𝑘 ∈ ∅ ↦ (𝐹‘𝑘)) = ∅
3	1, 2	eqtrdi 2790	. . . . . 6 ⊢ (𝑎 = ∅ → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ∅)
4	3	oveq2d 7372	. . . . 5 ⊢ (𝑎 = ∅ → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg ∅))
5	4	eqeq1d 2741	. . . 4 ⊢ (𝑎 = ∅ → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg ∅) = 0 ))
6	3	rneqd 5880	. . . . 5 ⊢ (𝑎 = ∅ → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran ∅)
7	6	eleq2d 2825	. . . 4 ⊢ (𝑎 = ∅ → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran ∅))
8	5, 7	bibi12d 346	. . 3 ⊢ (𝑎 = ∅ → (((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) ↔ ((𝑀 Σg ∅) = 0 ↔ 0 ∈ ran ∅)))
9		mpteq1 5161	. . . . . 6 ⊢ (𝑎 = 𝑏 → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))
10	9	oveq2d 7372	. . . . 5 ⊢ (𝑎 = 𝑏 → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))))
11	10	eqeq1d 2741	. . . 4 ⊢ (𝑎 = 𝑏 → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ))
12	9	rneqd 5880	. . . . 5 ⊢ (𝑎 = 𝑏 → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))
13	12	eleq2d 2825	. . . 4 ⊢ (𝑎 = 𝑏 → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))))
14	11, 13	bibi12d 346	. . 3 ⊢ (𝑎 = 𝑏 → (((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) ↔ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))))
15		mpteq1 5161	. . . . . 6 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))
16	15	oveq2d 7372	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))))
17	16	eqeq1d 2741	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ))
18	15	rneqd 5880	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))
19	18	eleq2d 2825	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))))
20	17, 19	bibi12d 346	. . 3 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → (((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) ↔ ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))))
21		mpteq1 5161	. . . . . 6 ⊢ (𝑎 = 𝐴 → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
22	21	oveq2d 7372	. . . . 5 ⊢ (𝑎 = 𝐴 → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
23	22	eqeq1d 2741	. . . 4 ⊢ (𝑎 = 𝐴 → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ))
24	21	rneqd 5880	. . . . 5 ⊢ (𝑎 = 𝐴 → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
25	24	eleq2d 2825	. . . 4 ⊢ (𝑎 = 𝐴 → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
26	23, 25	bibi12d 346	. . 3 ⊢ (𝑎 = 𝐴 → (((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) ↔ ((𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))))
27		domnprodeq0.m	. . . . . . . . 9 ⊢ 𝑀 = (mulGrp‘𝑅)
28		eqid 2739	. . . . . . . . 9 ⊢ (1r‘𝑅) = (1r‘𝑅)
29	27, 28	ringidval 20155	. . . . . . . 8 ⊢ (1r‘𝑅) = (0g‘𝑀)
30	29	gsum0 18643	. . . . . . 7 ⊢ (𝑀 Σg ∅) = (1r‘𝑅)
31	30	a1i 11	. . . . . 6 ⊢ (𝜑 → (𝑀 Σg ∅) = (1r‘𝑅))
32		domnprodeq0.r	. . . . . . . 8 ⊢ (𝜑 → 𝑅 ∈ IDomn)
33	32	idomdomd 20698	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ Domn)
34		domnnzr 20678	. . . . . . 7 ⊢ (𝑅 ∈ Domn → 𝑅 ∈ NzRing)
35		domnprodeq0.1	. . . . . . . 8 ⊢ 0 = (0g‘𝑅)
36	28, 35	nzrnz 20487	. . . . . . 7 ⊢ (𝑅 ∈ NzRing → (1r‘𝑅) ≠ 0 )
37	33, 34, 36	3syl 18	. . . . . 6 ⊢ (𝜑 → (1r‘𝑅) ≠ 0 )
38	31, 37	eqnetrd 3001	. . . . 5 ⊢ (𝜑 → (𝑀 Σg ∅) ≠ 0 )
39	38	neneqd 2939	. . . 4 ⊢ (𝜑 → ¬ (𝑀 Σg ∅) = 0 )
40		noel 4266	. . . . . 6 ⊢ ¬ 0 ∈ ∅
41		rn0 5868	. . . . . . 7 ⊢ ran ∅ = ∅
42	41	eleq2i 2831	. . . . . 6 ⊢ ( 0 ∈ ran ∅ ↔ 0 ∈ ∅)
43	40, 42	mtbir 324	. . . . 5 ⊢ ¬ 0 ∈ ran ∅
44	43	a1i 11	. . . 4 ⊢ (𝜑 → ¬ 0 ∈ ran ∅)
45	39, 44	2falsed 377	. . 3 ⊢ (𝜑 → ((𝑀 Σg ∅) = 0 ↔ 0 ∈ ran ∅))
46		simpr 485	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))) → ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))))
47	46	orbi1d 922	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))) → (((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ∨ (𝐹‘𝑙) = 0 ) ↔ ( 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) ∨ (𝐹‘𝑙) = 0 )))
48		domnprodeq0.b	. . . . . . . . . . 11 ⊢ 𝐵 = (Base‘𝑅)
49	27, 48	mgpbas 20117	. . . . . . . . . 10 ⊢ 𝐵 = (Base‘𝑀)
50		eqid 2739	. . . . . . . . . . 11 ⊢ (.r‘𝑅) = (.r‘𝑅)
51	27, 50	mgpplusg 20116	. . . . . . . . . 10 ⊢ (.r‘𝑅) = (+g‘𝑀)
52	32	idomcringd 20699	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑅 ∈ CRing)
53	27	crngmgp 20213	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ CRing → 𝑀 ∈ CMnd)
54	52, 53	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑀 ∈ CMnd)
55	54	ad2antrr 732	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑀 ∈ CMnd)
56		domnprodeq0.2	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ∈ Fin)
57	56	ad2antrr 732	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝐴 ∈ Fin)
58		simplr 774	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑏 ⊆ 𝐴)
59	57, 58	ssfid 9169	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑏 ∈ Fin)
60		domnprodeq0.f	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
61	60	ad3antrrr 736	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ 𝑘 ∈ 𝑏) → 𝐹:𝐴⟶𝐵)
62	58	sselda 3915	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ 𝑘 ∈ 𝑏) → 𝑘 ∈ 𝐴)
63	61, 62	ffvelcdmd 7026	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ 𝑘 ∈ 𝑏) → (𝐹‘𝑘) ∈ 𝐵)
64		simpr 485	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑙 ∈ (𝐴 ∖ 𝑏))
65	64	eldifbd 3896	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → ¬ 𝑙 ∈ 𝑏)
66	60	ad2antrr 732	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝐹:𝐴⟶𝐵)
67	64	eldifad 3895	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑙 ∈ 𝐴)
68	66, 67	ffvelcdmd 7026	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (𝐹‘𝑙) ∈ 𝐵)
69		fveq2 6827	. . . . . . . . . 10 ⊢ (𝑘 = 𝑙 → (𝐹‘𝑘) = (𝐹‘𝑙))
70	49, 51, 55, 59, 63, 64, 65, 68, 69	gsumunsn 19926	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))(.r‘𝑅)(𝐹‘𝑙)))
71	70	eqeq1d 2741	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))(.r‘𝑅)(𝐹‘𝑙)) = 0 ))
72	33	ad2antrr 732	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑅 ∈ Domn)
73	63	ralrimiva 3131	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → ∀𝑘 ∈ 𝑏 (𝐹‘𝑘) ∈ 𝐵)
74	49, 55, 59, 73	gsummptcl 19933	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) ∈ 𝐵)
75	48, 50, 35	domneq0 20680	. . . . . . . . 9 ⊢ ((𝑅 ∈ Domn ∧ (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) ∈ 𝐵 ∧ (𝐹‘𝑙) ∈ 𝐵) → (((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))(.r‘𝑅)(𝐹‘𝑙)) = 0 ↔ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ∨ (𝐹‘𝑙) = 0 )))
76	72, 74, 68, 75	syl3anc 1379	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))(.r‘𝑅)(𝐹‘𝑙)) = 0 ↔ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ∨ (𝐹‘𝑙) = 0 )))
77	71, 76	bitrd 280	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ∨ (𝐹‘𝑙) = 0 )))
78	77	adantr 481	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))) → ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ∨ (𝐹‘𝑙) = 0 )))
79		eqid 2739	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)) = (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))
80		fvex 6840	. . . . . . . . 9 ⊢ (𝐹‘𝑘) ∈ V
81	79, 80	elrnmpti 5904	. . . . . . . 8 ⊢ ( 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)) ↔ ∃𝑘 ∈ (𝑏 ∪ {𝑙}) 0 = (𝐹‘𝑘))
82		rexun 4125	. . . . . . . 8 ⊢ (∃𝑘 ∈ (𝑏 ∪ {𝑙}) 0 = (𝐹‘𝑘) ↔ (∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘) ∨ ∃𝑘 ∈ {𝑙} 0 = (𝐹‘𝑘)))
83		eqid 2739	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) = (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))
84	83, 80	elrnmpti 5904	. . . . . . . . . 10 ⊢ ( 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) ↔ ∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘))
85	84	bicomi 225	. . . . . . . . 9 ⊢ (∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘) ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))
86		vex 3435	. . . . . . . . . 10 ⊢ 𝑙 ∈ V
87	69	eqeq2d 2750	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑙 → ( 0 = (𝐹‘𝑘) ↔ 0 = (𝐹‘𝑙)))
88		eqcom 2746	. . . . . . . . . . 11 ⊢ ( 0 = (𝐹‘𝑙) ↔ (𝐹‘𝑙) = 0 )
89	87, 88	bitrdi 288	. . . . . . . . . 10 ⊢ (𝑘 = 𝑙 → ( 0 = (𝐹‘𝑘) ↔ (𝐹‘𝑙) = 0 ))
90	86, 89	rexsn 4614	. . . . . . . . 9 ⊢ (∃𝑘 ∈ {𝑙} 0 = (𝐹‘𝑘) ↔ (𝐹‘𝑙) = 0 )
91	85, 90	orbi12i 920	. . . . . . . 8 ⊢ ((∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘) ∨ ∃𝑘 ∈ {𝑙} 0 = (𝐹‘𝑘)) ↔ ( 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) ∨ (𝐹‘𝑙) = 0 ))
92	81, 82, 91	3bitri 298	. . . . . . 7 ⊢ ( 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)) ↔ ( 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) ∨ (𝐹‘𝑙) = 0 ))
93	92	a1i 11	. . . . . 6 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))) → ( 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)) ↔ ( 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) ∨ (𝐹‘𝑙) = 0 )))
94	47, 78, 93	3bitr4d 312	. . . . 5 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ ((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))) → ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))))
95	94	ex 413	. . . 4 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) → ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))))
96	95	anasss 467	. . 3 ⊢ ((𝜑 ∧ (𝑏 ⊆ 𝐴 ∧ 𝑙 ∈ (𝐴 ∖ 𝑏))) → (((𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) → ((𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))))
97	8, 14, 20, 26, 45, 96, 56	findcard2d 9091	. 2 ⊢ (𝜑 → ((𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
98	60	feqmptd 6895	. . . 4 ⊢ (𝜑 → 𝐹 = (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
99	98	oveq2d 7372	. . 3 ⊢ (𝜑 → (𝑀 Σg 𝐹) = (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
100	99	eqeq1d 2741	. 2 ⊢ (𝜑 → ((𝑀 Σg 𝐹) = 0 ↔ (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ))
101	98	rneqd 5880	. . 3 ⊢ (𝜑 → ran 𝐹 = ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
102	101	eleq2d 2825	. 2 ⊢ (𝜑 → ( 0 ∈ ran 𝐹 ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
103	97, 100, 102	3bitr4d 312	1 ⊢ (𝜑 → ((𝑀 Σg 𝐹) = 0 ↔ 0 ∈ ran 𝐹))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 207   ∧ wa 396   ∨ wo 853   = wceq 1547   ∈ wcel 2119   ≠ wne 2934  ∃wrex 3063   ∖ cdif 3880   ∪ cun 3881   ⊆ wss 3883  ∅c0 4261  {csn 4555   ↦ cmpt 5153  ran crn 5619  ⟶wf 6481  ‘cfv 6485  (class class class)co 7356  Fincfn 8883  Basecbs 17170  ._rcmulr 17212  0_gc0g 17393   Σ_g cgsu 17394  CMndccmn 19746  mulGrpcmgp 20112  1_rcur 20153  CRingccrg 20206  NzRingcnzr 20484  Domncdomn 20664  IDomncidom 20665

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-rep 5199  ax-sep 5218  ax-nul 5228  ax-pow 5294  ax-pr 5362  ax-un 7678  ax-cnex 11085  ax-resscn 11086  ax-1cn 11087  ax-icn 11088  ax-addcl 11089  ax-addrcl 11090  ax-mulcl 11091  ax-mulrcl 11092  ax-mulcom 11093  ax-addass 11094  ax-mulass 11095  ax-distr 11096  ax-i2m1 11097  ax-1ne0 11098  ax-1rid 11099  ax-rnegex 11100  ax-rrecex 11101  ax-cnre 11102  ax-pre-lttri 11103  ax-pre-lttrn 11104  ax-pre-ltadd 11105  ax-pre-mulgt0 11106

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3or 1093  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ne 2935  df-nel 3039  df-ral 3054  df-rex 3064  df-rmo 3344  df-reu 3345  df-rab 3392  df-v 3433  df-sbc 3724  df-csb 3832  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-pss 3903  df-nul 4262  df-if 4455  df-pw 4531  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-int 4878  df-iun 4923  df-iin 4924  df-br 5073  df-opab 5135  df-mpt 5154  df-tr 5180  df-id 5513  df-eprel 5518  df-po 5526  df-so 5527  df-fr 5571  df-se 5572  df-we 5573  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-rn 5629  df-res 5630  df-ima 5631  df-pred 6252  df-ord 6313  df-on 6314  df-lim 6315  df-suc 6316  df-iota 6441  df-fun 6487  df-fn 6488  df-f 6489  df-f1 6490  df-fo 6491  df-f1o 6492  df-fv 6493  df-isom 6494  df-riota 7313  df-ov 7359  df-oprab 7360  df-mpo 7361  df-of 7620  df-om 7807  df-1st 7931  df-2nd 7932  df-supp 8101  df-frecs 8221  df-wrecs 8252  df-recs 8301  df-rdg 8339  df-1o 8395  df-2o 8396  df-er 8633  df-en 8884  df-dom 8885  df-sdom 8886  df-fin 8887  df-fsupp 9265  df-oi 9415  df-card 9854  df-pnf 11172  df-mnf 11173  df-xr 11174  df-ltxr 11175  df-le 11176  df-sub 11370  df-neg 11371  df-nn 12166  df-2 12235  df-n0 12429  df-z 12516  df-uz 12780  df-fz 13453  df-fzo 13600  df-seq 13955  df-hash 14284  df-sets 17125  df-slot 17143  df-ndx 17155  df-base 17171  df-ress 17192  df-plusg 17224  df-0g 17395  df-gsum 17396  df-mre 17539  df-mrc 17540  df-acs 17542  df-mgm 18599  df-sgrp 18678  df-mnd 18694  df-submnd 18743  df-grp 18903  df-minusg 18904  df-mulg 19035  df-cntz 19283  df-cmn 19748  df-abl 19749  df-mgp 20113  df-rng 20125  df-ur 20154  df-ring 20207  df-cring 20208  df-nzr 20485  df-domn 20667  df-idom 20668

This theorem is referenced by:  deg1prod  33666