Theorem ptex 12952

Description: Existence of the product topology. (Contributed by Jim Kingdon, 19-Mar-2025.)

Assertion

Ref	Expression
ptex	⊢ (𝐹 ∈ 𝑉 → (∏t‘𝐹) ∈ V)

Proof of Theorem ptex

Dummy variables 𝑓 𝑔 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-pt 12949	. . 3 ⊢ ∏t = (𝑓 ∈ V ↦ (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝑓 ∧ ∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝑓(𝑔‘𝑦))}))
2		dmeq 4867	. . . . . . . . 9 ⊢ (𝑓 = 𝐹 → dom 𝑓 = dom 𝐹)
3	2	fneq2d 5350	. . . . . . . 8 ⊢ (𝑓 = 𝐹 → (𝑔 Fn dom 𝑓 ↔ 𝑔 Fn dom 𝐹))
4		fveq1 5558	. . . . . . . . . 10 ⊢ (𝑓 = 𝐹 → (𝑓‘𝑦) = (𝐹‘𝑦))
5	4	eleq2d 2266	. . . . . . . . 9 ⊢ (𝑓 = 𝐹 → ((𝑔‘𝑦) ∈ (𝑓‘𝑦) ↔ (𝑔‘𝑦) ∈ (𝐹‘𝑦)))
6	2, 5	raleqbidv 2709	. . . . . . . 8 ⊢ (𝑓 = 𝐹 → (∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ↔ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦)))
7	2	difeq1d 3281	. . . . . . . . . 10 ⊢ (𝑓 = 𝐹 → (dom 𝑓 ∖ 𝑧) = (dom 𝐹 ∖ 𝑧))
8	4	unieqd 3851	. . . . . . . . . . 11 ⊢ (𝑓 = 𝐹 → ∪ (𝑓‘𝑦) = ∪ (𝐹‘𝑦))
9	8	eqeq2d 2208	. . . . . . . . . 10 ⊢ (𝑓 = 𝐹 → ((𝑔‘𝑦) = ∪ (𝑓‘𝑦) ↔ (𝑔‘𝑦) = ∪ (𝐹‘𝑦)))
10	7, 9	raleqbidv 2709	. . . . . . . . 9 ⊢ (𝑓 = 𝐹 → (∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦) ↔ ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)))
11	10	rexbidv 2498	. . . . . . . 8 ⊢ (𝑓 = 𝐹 → (∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦) ↔ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)))
12	3, 6, 11	3anbi123d 1323	. . . . . . 7 ⊢ (𝑓 = 𝐹 → ((𝑔 Fn dom 𝑓 ∧ ∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦)) ↔ (𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦))))
13	2	ixpeq1d 6771	. . . . . . . 8 ⊢ (𝑓 = 𝐹 → X𝑦 ∈ dom 𝑓(𝑔‘𝑦) = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))
14	13	eqeq2d 2208	. . . . . . 7 ⊢ (𝑓 = 𝐹 → (𝑥 = X𝑦 ∈ dom 𝑓(𝑔‘𝑦) ↔ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)))
15	12, 14	anbi12d 473	. . . . . 6 ⊢ (𝑓 = 𝐹 → (((𝑔 Fn dom 𝑓 ∧ ∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝑓(𝑔‘𝑦)) ↔ ((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))))
16	15	exbidv 1839	. . . . 5 ⊢ (𝑓 = 𝐹 → (∃𝑔((𝑔 Fn dom 𝑓 ∧ ∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝑓(𝑔‘𝑦)) ↔ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))))
17	16	abbidv 2314	. . . 4 ⊢ (𝑓 = 𝐹 → {𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝑓 ∧ ∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝑓(𝑔‘𝑦))} = {𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))})
18	17	fveq2d 5563	. . 3 ⊢ (𝑓 = 𝐹 → (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝑓 ∧ ∀𝑦 ∈ dom 𝑓(𝑔‘𝑦) ∈ (𝑓‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝑓 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝑓‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝑓(𝑔‘𝑦))}) = (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))}))
19		elex 2774	. . 3 ⊢ (𝐹 ∈ 𝑉 → 𝐹 ∈ V)
20		dmexg 4931	. . . . . . . . . 10 ⊢ (𝐹 ∈ 𝑉 → dom 𝐹 ∈ V)
21		vex 2766	. . . . . . . . . . . . 13 ⊢ 𝑔 ∈ V
22		vex 2766	. . . . . . . . . . . . 13 ⊢ 𝑦 ∈ V
23	21, 22	fvex 5579	. . . . . . . . . . . 12 ⊢ (𝑔‘𝑦) ∈ V
24	23	a1i 9	. . . . . . . . . . 11 ⊢ (𝐹 ∈ 𝑉 → (𝑔‘𝑦) ∈ V)
25	24	ralrimivw 2571	. . . . . . . . . 10 ⊢ (𝐹 ∈ 𝑉 → ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V)
26		ixpexgg 6783	. . . . . . . . . 10 ⊢ ((dom 𝐹 ∈ V ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V) → X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V)
27	20, 25, 26	syl2anc 411	. . . . . . . . 9 ⊢ (𝐹 ∈ 𝑉 → X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V)
28	27	ralrimivw 2571	. . . . . . . 8 ⊢ (𝐹 ∈ 𝑉 → ∀𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V)
29		dfiun2g 3949	. . . . . . . 8 ⊢ (∀𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V → ∪ 𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) = ∪ {𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)})
30	28, 29	syl 14	. . . . . . 7 ⊢ (𝐹 ∈ 𝑉 → ∪ 𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) = ∪ {𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)})
31		rnexg 4932	. . . . . . . . . 10 ⊢ (𝐹 ∈ 𝑉 → ran 𝐹 ∈ V)
32	31	uniexd 4476	. . . . . . . . 9 ⊢ (𝐹 ∈ 𝑉 → ∪ ran 𝐹 ∈ V)
33		mapvalg 6719	. . . . . . . . . 10 ⊢ ((∪ ran 𝐹 ∈ V ∧ dom 𝐹 ∈ V) → (∪ ran 𝐹 ↑𝑚 dom 𝐹) = {𝑔 ∣ 𝑔:dom 𝐹⟶∪ ran 𝐹})
34		mapex 6715	. . . . . . . . . . 11 ⊢ ((dom 𝐹 ∈ V ∧ ∪ ran 𝐹 ∈ V) → {𝑔 ∣ 𝑔:dom 𝐹⟶∪ ran 𝐹} ∈ V)
35	34	ancoms 268	. . . . . . . . . 10 ⊢ ((∪ ran 𝐹 ∈ V ∧ dom 𝐹 ∈ V) → {𝑔 ∣ 𝑔:dom 𝐹⟶∪ ran 𝐹} ∈ V)
36	33, 35	eqeltrd 2273	. . . . . . . . 9 ⊢ ((∪ ran 𝐹 ∈ V ∧ dom 𝐹 ∈ V) → (∪ ran 𝐹 ↑𝑚 dom 𝐹) ∈ V)
37	32, 20, 36	syl2anc 411	. . . . . . . 8 ⊢ (𝐹 ∈ 𝑉 → (∪ ran 𝐹 ↑𝑚 dom 𝐹) ∈ V)
38		iunexg 6178	. . . . . . . 8 ⊢ (((∪ ran 𝐹 ↑𝑚 dom 𝐹) ∈ V ∧ ∀𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V) → ∪ 𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V)
39	37, 28, 38	syl2anc 411	. . . . . . 7 ⊢ (𝐹 ∈ 𝑉 → ∪ 𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ V)
40	30, 39	eqeltrrd 2274	. . . . . 6 ⊢ (𝐹 ∈ 𝑉 → ∪ {𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)} ∈ V)
41		uniexb 4509	. . . . . 6 ⊢ ({𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)} ∈ V ↔ ∪ {𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)} ∈ V)
42	40, 41	sylibr 134	. . . . 5 ⊢ (𝐹 ∈ 𝑉 → {𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)} ∈ V)
43		simp1 999	. . . . . . . . . . 11 ⊢ ((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) → 𝑔 Fn dom 𝐹)
44		fvssunirng 5574	. . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ V → (𝐹‘𝑦) ⊆ ∪ ran 𝐹)
45	44	elv 2767	. . . . . . . . . . . . . 14 ⊢ (𝐹‘𝑦) ⊆ ∪ ran 𝐹
46	45	sseli 3180	. . . . . . . . . . . . 13 ⊢ ((𝑔‘𝑦) ∈ (𝐹‘𝑦) → (𝑔‘𝑦) ∈ ∪ ran 𝐹)
47	46	ralimi 2560	. . . . . . . . . . . 12 ⊢ (∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) → ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ ∪ ran 𝐹)
48	47	3ad2ant2 1021	. . . . . . . . . . 11 ⊢ ((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) → ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ ∪ ran 𝐹)
49		ffnfv 5721	. . . . . . . . . . 11 ⊢ (𝑔:dom 𝐹⟶∪ ran 𝐹 ↔ (𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ ∪ ran 𝐹))
50	43, 48, 49	sylanbrc 417	. . . . . . . . . 10 ⊢ ((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) → 𝑔:dom 𝐹⟶∪ ran 𝐹)
51	32, 20	elmapd 6723	. . . . . . . . . 10 ⊢ (𝐹 ∈ 𝑉 → (𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹) ↔ 𝑔:dom 𝐹⟶∪ ran 𝐹))
52	50, 51	imbitrrid 156	. . . . . . . . 9 ⊢ (𝐹 ∈ 𝑉 → ((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) → 𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)))
53	52	anim1d 336	. . . . . . . 8 ⊢ (𝐹 ∈ 𝑉 → (((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)) → (𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))))
54	53	eximdv 1894	. . . . . . 7 ⊢ (𝐹 ∈ 𝑉 → (∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)) → ∃𝑔(𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))))
55		df-rex 2481	. . . . . . 7 ⊢ (∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦) ↔ ∃𝑔(𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)))
56	54, 55	imbitrrdi 162	. . . . . 6 ⊢ (𝐹 ∈ 𝑉 → (∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)) → ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)))
57	56	ss2abdv 3257	. . . . 5 ⊢ (𝐹 ∈ 𝑉 → {𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))} ⊆ {𝑥 ∣ ∃𝑔 ∈ (∪ ran 𝐹 ↑𝑚 dom 𝐹)𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦)})
58	42, 57	ssexd 4174	. . . 4 ⊢ (𝐹 ∈ 𝑉 → {𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))} ∈ V)
59		tgvalex 12951	. . . 4 ⊢ ({𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))} ∈ V → (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))}) ∈ V)
60	58, 59	syl 14	. . 3 ⊢ (𝐹 ∈ 𝑉 → (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))}) ∈ V)
61	1, 18, 19, 60	fvmptd3 5656	. 2 ⊢ (𝐹 ∈ 𝑉 → (∏t‘𝐹) = (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn dom 𝐹 ∧ ∀𝑦 ∈ dom 𝐹(𝑔‘𝑦) ∈ (𝐹‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (dom 𝐹 ∖ 𝑧)(𝑔‘𝑦) = ∪ (𝐹‘𝑦)) ∧ 𝑥 = X𝑦 ∈ dom 𝐹(𝑔‘𝑦))}))
62	61, 60	eqeltrd 2273	1 ⊢ (𝐹 ∈ 𝑉 → (∏t‘𝐹) ∈ V)

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 980   = wceq 1364  ∃wex 1506   ∈ wcel 2167  {cab 2182  ∀wral 2475  ∃wrex 2476  Vcvv 2763   ∖ cdif 3154   ⊆ wss 3157  ∪ cuni 3840  ∪ ciun 3917  dom cdm 4664  ran crn 4665   Fn wfn 5254  ⟶wf 5255  ‘cfv 5259  (class class class)co 5923   ↑_𝑚 cmap 6709  Xcixp 6759  Fincfn 6801  topGenctg 12942  ∏_tcpt 12943

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4149  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-iun 3919  df-br 4035  df-opab 4096  df-mpt 4097  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-f 5263  df-f1 5264  df-fo 5265  df-f1o 5266  df-fv 5267  df-ov 5926  df-oprab 5927  df-mpo 5928  df-map 6711  df-ixp 6760  df-topgen 12948  df-pt 12949

This theorem is referenced by:  prdsex  12957  prdsval  12961  prdsbaslemss  12962  psrval  14246  fnpsr  14247  psrbasg  14253  psrplusgg  14256