Theorem domnprodeq0 33421

Description: A product over a domain is zero exactly when one of the factors is zero. Generalization of domneq0 20745 for any number of factors. See also domnprodn0 33420. (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 5186	. . . . . . 7 ⊢ (𝑎 = ∅ → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ ∅ ↦ (𝐹‘𝑘)))
2		mpt0 6658	. . . . . . 7 ⊢ (𝑘 ∈ ∅ ↦ (𝐹‘𝑘)) = ∅
3	1, 2	eqtrdi 2812	. . . . . 6 ⊢ (𝑎 = ∅ → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ∅)
4	3	oveq2d 7407	. . . . 5 ⊢ (𝑎 = ∅ → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg ∅))
5	4	eqeq1d 2763	. . . 4 ⊢ (𝑎 = ∅ → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg ∅) = 0 ))
6	3	rneqd 5910	. . . . 5 ⊢ (𝑎 = ∅ → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran ∅)
7	6	eleq2d 2847	. . . 4 ⊢ (𝑎 = ∅ → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran ∅))
8	5, 7	bibi12d 347	. . 3 ⊢ (𝑎 = ∅ → (((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) ↔ ((𝑀 Σg ∅) = 0 ↔ 0 ∈ ran ∅)))
9		mpteq1 5186	. . . . . 6 ⊢ (𝑎 = 𝑏 → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))
10	9	oveq2d 7407	. . . . 5 ⊢ (𝑎 = 𝑏 → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))))
11	10	eqeq1d 2763	. . . 4 ⊢ (𝑎 = 𝑏 → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) = 0 ))
12	9	rneqd 5910	. . . . 5 ⊢ (𝑎 = 𝑏 → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))
13	12	eleq2d 2847	. . . 4 ⊢ (𝑎 = 𝑏 → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))))
14	11, 13	bibi12d 347	. . 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 5186	. . . . . 6 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))
16	15	oveq2d 7407	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))))
17	16	eqeq1d 2763	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))) = 0 ))
18	15	rneqd 5910	. . . . 5 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)))
19	18	eleq2d 2847	. . . 4 ⊢ (𝑎 = (𝑏 ∪ {𝑙}) → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))))
20	17, 19	bibi12d 347	. . 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 5186	. . . . . 6 ⊢ (𝑎 = 𝐴 → (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
22	21	oveq2d 7407	. . . . 5 ⊢ (𝑎 = 𝐴 → (𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
23	22	eqeq1d 2763	. . . 4 ⊢ (𝑎 = 𝐴 → ((𝑀 Σg (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘))) = 0 ↔ (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ))
24	21	rneqd 5910	. . . . 5 ⊢ (𝑎 = 𝐴 → ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) = ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
25	24	eleq2d 2847	. . . 4 ⊢ (𝑎 = 𝐴 → ( 0 ∈ ran (𝑘 ∈ 𝑎 ↦ (𝐹‘𝑘)) ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
26	23, 25	bibi12d 347	. . 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 2761	. . . . . . . . 9 ⊢ (1r‘𝑅) = (1r‘𝑅)
29	27, 28	ringidval 20220	. . . . . . . 8 ⊢ (1r‘𝑅) = (0g‘𝑀)
30	29	gsum0 18709	. . . . . . 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 20763	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ Domn)
34		domnnzr 20743	. . . . . . 7 ⊢ (𝑅 ∈ Domn → 𝑅 ∈ NzRing)
35		domnprodeq0.1	. . . . . . . 8 ⊢ 0 = (0g‘𝑅)
36	28, 35	nzrnz 20552	. . . . . . 7 ⊢ (𝑅 ∈ NzRing → (1r‘𝑅) ≠ 0 )
37	33, 34, 36	3syl 18	. . . . . 6 ⊢ (𝜑 → (1r‘𝑅) ≠ 0 )
38	31, 37	eqnetrd 3023	. . . . 5 ⊢ (𝜑 → (𝑀 Σg ∅) ≠ 0 )
39	38	neneqd 2961	. . . 4 ⊢ (𝜑 → ¬ (𝑀 Σg ∅) = 0 )
40		noel 4288	. . . . . 6 ⊢ ¬ 0 ∈ ∅
41		rn0 5898	. . . . . . 7 ⊢ ran ∅ = ∅
42	41	eleq2i 2853	. . . . . 6 ⊢ ( 0 ∈ ran ∅ ↔ 0 ∈ ∅)
43	40, 42	mtbir 325	. . . . 5 ⊢ ¬ 0 ∈ ran ∅
44	43	a1i 11	. . . 4 ⊢ (𝜑 → ¬ 0 ∈ ran ∅)
45	39, 44	2falsed 378	. . 3 ⊢ (𝜑 → ((𝑀 Σg ∅) = 0 ↔ 0 ∈ ran ∅))
46		simpr 488	. . . . . . 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 927	. . . . . 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 20182	. . . . . . . . . 10 ⊢ 𝐵 = (Base‘𝑀)
50		eqid 2761	. . . . . . . . . . 11 ⊢ (.r‘𝑅) = (.r‘𝑅)
51	27, 50	mgpplusg 20181	. . . . . . . . . 10 ⊢ (.r‘𝑅) = (+g‘𝑀)
52	32	idomcringd 20764	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑅 ∈ CRing)
53	27	crngmgp 20278	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ CRing → 𝑀 ∈ CMnd)
54	52, 53	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑀 ∈ CMnd)
55	54	ad2antrr 736	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑀 ∈ CMnd)
56		domnprodeq0.2	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐴 ∈ Fin)
57	56	ad2antrr 736	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝐴 ∈ Fin)
58		simplr 778	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑏 ⊆ 𝐴)
59	57, 58	ssfid 9207	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑏 ∈ Fin)
60		domnprodeq0.f	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐹:𝐴⟶𝐵)
61	60	ad3antrrr 740	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ 𝑘 ∈ 𝑏) → 𝐹:𝐴⟶𝐵)
62	58	sselda 3934	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ 𝑘 ∈ 𝑏) → 𝑘 ∈ 𝐴)
63	61, 62	ffvelcdmd 7061	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) ∧ 𝑘 ∈ 𝑏) → (𝐹‘𝑘) ∈ 𝐵)
64		simpr 488	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑙 ∈ (𝐴 ∖ 𝑏))
65	64	eldifbd 3915	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → ¬ 𝑙 ∈ 𝑏)
66	60	ad2antrr 736	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝐹:𝐴⟶𝐵)
67	64	eldifad 3914	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑙 ∈ 𝐴)
68	66, 67	ffvelcdmd 7061	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (𝐹‘𝑙) ∈ 𝐵)
69		fveq2 6862	. . . . . . . . . 10 ⊢ (𝑘 = 𝑙 → (𝐹‘𝑘) = (𝐹‘𝑙))
70	49, 51, 55, 59, 63, 64, 65, 68, 69	gsumunsn 19991	. . . . . . . . 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 2763	. . . . . . . 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 736	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → 𝑅 ∈ Domn)
73	63	ralrimiva 3153	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → ∀𝑘 ∈ 𝑏 (𝐹‘𝑘) ∈ 𝐵)
74	49, 55, 59, 73	gsummptcl 19998	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑏 ⊆ 𝐴) ∧ 𝑙 ∈ (𝐴 ∖ 𝑏)) → (𝑀 Σg (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))) ∈ 𝐵)
75	48, 50, 35	domneq0 20745	. . . . . . . . 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 1389	. . . . . . . 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 281	. . . . . . 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 484	. . . . . 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 2761	. . . . . . . . 9 ⊢ (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)) = (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘))
80		fvex 6875	. . . . . . . . 9 ⊢ (𝐹‘𝑘) ∈ V
81	79, 80	elrnmpti 5934	. . . . . . . 8 ⊢ ( 0 ∈ ran (𝑘 ∈ (𝑏 ∪ {𝑙}) ↦ (𝐹‘𝑘)) ↔ ∃𝑘 ∈ (𝑏 ∪ {𝑙}) 0 = (𝐹‘𝑘))
82		rexun 4146	. . . . . . . 8 ⊢ (∃𝑘 ∈ (𝑏 ∪ {𝑙}) 0 = (𝐹‘𝑘) ↔ (∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘) ∨ ∃𝑘 ∈ {𝑙} 0 = (𝐹‘𝑘)))
83		eqid 2761	. . . . . . . . . . 11 ⊢ (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) = (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘))
84	83, 80	elrnmpti 5934	. . . . . . . . . 10 ⊢ ( 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)) ↔ ∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘))
85	84	bicomi 226	. . . . . . . . 9 ⊢ (∃𝑘 ∈ 𝑏 0 = (𝐹‘𝑘) ↔ 0 ∈ ran (𝑘 ∈ 𝑏 ↦ (𝐹‘𝑘)))
86		vex 3457	. . . . . . . . . 10 ⊢ 𝑙 ∈ V
87	69	eqeq2d 2772	. . . . . . . . . . 11 ⊢ (𝑘 = 𝑙 → ( 0 = (𝐹‘𝑘) ↔ 0 = (𝐹‘𝑙)))
88		eqcom 2768	. . . . . . . . . . 11 ⊢ ( 0 = (𝐹‘𝑙) ↔ (𝐹‘𝑙) = 0 )
89	87, 88	bitrdi 289	. . . . . . . . . 10 ⊢ (𝑘 = 𝑙 → ( 0 = (𝐹‘𝑘) ↔ (𝐹‘𝑙) = 0 ))
90	86, 89	rexsn 4638	. . . . . . . . 9 ⊢ (∃𝑘 ∈ {𝑙} 0 = (𝐹‘𝑘) ↔ (𝐹‘𝑙) = 0 )
91	85, 90	orbi12i 925	. . . . . . . 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 299	. . . . . . 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 313	. . . . 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 416	. . . 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 470	. . 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 9129	. 2 ⊢ (𝜑 → ((𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
98	60	feqmptd 6930	. . . 4 ⊢ (𝜑 → 𝐹 = (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
99	98	oveq2d 7407	. . 3 ⊢ (𝜑 → (𝑀 Σg 𝐹) = (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
100	99	eqeq1d 2763	. 2 ⊢ (𝜑 → ((𝑀 Σg 𝐹) = 0 ↔ (𝑀 Σg (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))) = 0 ))
101	98	rneqd 5910	. . 3 ⊢ (𝜑 → ran 𝐹 = ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘)))
102	101	eleq2d 2847	. 2 ⊢ (𝜑 → ( 0 ∈ ran 𝐹 ↔ 0 ∈ ran (𝑘 ∈ 𝐴 ↦ (𝐹‘𝑘))))
103	97, 100, 102	3bitr4d 313	1 ⊢ (𝜑 → ((𝑀 Σg 𝐹) = 0 ↔ 0 ∈ ran 𝐹))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 208   ∧ wa 399   ∨ wo 858   = wceq 1559   ∈ wcel 2141   ≠ wne 2956  ∃wrex 3085   ∖ cdif 3899   ∪ cun 3900   ⊆ wss 3902  ∅c0 4283  {csn 4579   ↦ cmpt 5178  ran crn 5644  ⟶wf 6512  ‘cfv 6516  (class class class)co 7391  Fincfn 8921  Basecbs 17236  ._rcmulr 17278  0_gc0g 17459   Σ_g cgsu 17460  CMndccmn 19811  mulGrpcmgp 20177  1_rcur 20218  CRingccrg 20271  NzRingcnzr 20549  Domncdomn 20729  IDomncidom 20730

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1814  ax-4 1828  ax-5 1929  ax-6 1986  ax-7 2027  ax-8 2143  ax-9 2151  ax-10 2174  ax-11 2190  ax-12 2211  ax-ext 2733  ax-rep 5224  ax-sep 5243  ax-nul 5253  ax-pow 5319  ax-pr 5387  ax-un 7713  ax-cnex 11123  ax-resscn 11124  ax-1cn 11125  ax-icn 11126  ax-addcl 11127  ax-addrcl 11128  ax-mulcl 11129  ax-mulrcl 11130  ax-mulcom 11131  ax-addass 11132  ax-mulass 11133  ax-distr 11134  ax-i2m1 11135  ax-1ne0 11136  ax-1rid 11137  ax-rnegex 11138  ax-rrecex 11139  ax-cnre 11140  ax-pre-lttri 11141  ax-pre-lttrn 11142  ax-pre-ltadd 11143  ax-pre-mulgt0 11144

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3or 1098  df-3an 1099  df-tru 1562  df-fal 1572  df-ex 1799  df-nf 1803  df-sb 2090  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-nel 3061  df-ral 3076  df-rex 3086  df-rmo 3366  df-reu 3367  df-rab 3414  df-v 3455  df-sbc 3743  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-pss 3922  df-nul 4284  df-if 4478  df-pw 4554  df-sn 4580  df-pr 4582  df-op 4586  df-uni 4863  df-int 4903  df-iun 4948  df-iin 4949  df-br 5098  df-opab 5160  df-mpt 5179  df-tr 5205  df-id 5538  df-eprel 5543  df-po 5551  df-so 5552  df-fr 5596  df-se 5597  df-we 5598  df-xp 5649  df-rel 5650  df-cnv 5651  df-co 5652  df-dm 5653  df-rn 5654  df-res 5655  df-ima 5656  df-pred 6283  df-ord 6344  df-on 6345  df-lim 6346  df-suc 6347  df-iota 6472  df-fun 6518  df-fn 6519  df-f 6520  df-f1 6521  df-fo 6522  df-f1o 6523  df-fv 6524  df-isom 6525  df-riota 7348  df-ov 7394  df-oprab 7395  df-mpo 7396  df-of 7655  df-om 7842  df-1st 7965  df-2nd 7966  df-supp 8135  df-frecs 8256  df-wrecs 8287  df-recs 8336  df-rdg 8375  df-1o 8431  df-2o 8432  df-er 8672  df-en 8922  df-dom 8923  df-sdom 8924  df-fin 8925  df-fsupp 9302  df-oi 9452  df-card 9891  df-pnf 11212  df-mnf 11213  df-xr 11214  df-ltxr 11215  df-le 11216  df-sub 11410  df-neg 11411  df-nn 12205  df-2 12274  df-n0 12476  df-z 12563  df-uz 12834  df-fz 13507  df-fzo 13654  df-seq 14009  df-hash 14338  df-sets 17191  df-slot 17209  df-ndx 17221  df-base 17237  df-ress 17258  df-plusg 17290  df-0g 17461  df-gsum 17462  df-mre 17605  df-mrc 17606  df-acs 17608  df-mgm 18665  df-sgrp 18744  df-mnd 18760  df-submnd 18809  df-grp 18969  df-minusg 18970  df-mulg 19101  df-cntz 19348  df-cmn 19813  df-abl 19814  df-mgp 20178  df-rng 20190  df-ur 20219  df-ring 20272  df-cring 20273  df-nzr 20550  df-domn 20732  df-idom 20733

This theorem is referenced by:  deg1prod  33740