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Theorem ptclsg 21466
 Description: The closure of a box in the product topology is the box formed from the closures of the factors. The proof uses the axiom of choice; the last hypothesis is the choice assumption. (Contributed by Mario Carneiro, 3-Sep-2015.)
Hypotheses
Ref Expression
ptcls.2 𝐽 = (∏t‘(𝑘𝐴𝑅))
ptcls.a (𝜑𝐴𝑉)
ptcls.j ((𝜑𝑘𝐴) → 𝑅 ∈ (TopOn‘𝑋))
ptcls.c ((𝜑𝑘𝐴) → 𝑆𝑋)
ptclsg.1 (𝜑 𝑘𝐴 𝑆AC 𝐴)
Assertion
Ref Expression
ptclsg (𝜑 → ((cls‘𝐽)‘X𝑘𝐴 𝑆) = X𝑘𝐴 ((cls‘𝑅)‘𝑆))
Distinct variable groups:   𝜑,𝑘   𝐴,𝑘
Allowed substitution hints:   𝑅(𝑘)   𝑆(𝑘)   𝐽(𝑘)   𝑉(𝑘)   𝑋(𝑘)

Proof of Theorem ptclsg
Dummy variables 𝑓 𝑔 𝑢 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ptcls.a . . . . 5 (𝜑𝐴𝑉)
2 ptcls.j . . . . . 6 ((𝜑𝑘𝐴) → 𝑅 ∈ (TopOn‘𝑋))
3 topontop 20766 . . . . . 6 (𝑅 ∈ (TopOn‘𝑋) → 𝑅 ∈ Top)
42, 3syl 17 . . . . 5 ((𝜑𝑘𝐴) → 𝑅 ∈ Top)
5 ptcls.c . . . . . . 7 ((𝜑𝑘𝐴) → 𝑆𝑋)
6 toponuni 20767 . . . . . . . 8 (𝑅 ∈ (TopOn‘𝑋) → 𝑋 = 𝑅)
72, 6syl 17 . . . . . . 7 ((𝜑𝑘𝐴) → 𝑋 = 𝑅)
85, 7sseqtrd 3674 . . . . . 6 ((𝜑𝑘𝐴) → 𝑆 𝑅)
9 eqid 2651 . . . . . . 7 𝑅 = 𝑅
109clscld 20899 . . . . . 6 ((𝑅 ∈ Top ∧ 𝑆 𝑅) → ((cls‘𝑅)‘𝑆) ∈ (Clsd‘𝑅))
114, 8, 10syl2anc 694 . . . . 5 ((𝜑𝑘𝐴) → ((cls‘𝑅)‘𝑆) ∈ (Clsd‘𝑅))
121, 4, 11ptcldmpt 21465 . . . 4 (𝜑X𝑘𝐴 ((cls‘𝑅)‘𝑆) ∈ (Clsd‘(∏t‘(𝑘𝐴𝑅))))
13 ptcls.2 . . . . 5 𝐽 = (∏t‘(𝑘𝐴𝑅))
1413fveq2i 6232 . . . 4 (Clsd‘𝐽) = (Clsd‘(∏t‘(𝑘𝐴𝑅)))
1512, 14syl6eleqr 2741 . . 3 (𝜑X𝑘𝐴 ((cls‘𝑅)‘𝑆) ∈ (Clsd‘𝐽))
169sscls 20908 . . . . . 6 ((𝑅 ∈ Top ∧ 𝑆 𝑅) → 𝑆 ⊆ ((cls‘𝑅)‘𝑆))
174, 8, 16syl2anc 694 . . . . 5 ((𝜑𝑘𝐴) → 𝑆 ⊆ ((cls‘𝑅)‘𝑆))
1817ralrimiva 2995 . . . 4 (𝜑 → ∀𝑘𝐴 𝑆 ⊆ ((cls‘𝑅)‘𝑆))
19 ss2ixp 7963 . . . 4 (∀𝑘𝐴 𝑆 ⊆ ((cls‘𝑅)‘𝑆) → X𝑘𝐴 𝑆X𝑘𝐴 ((cls‘𝑅)‘𝑆))
2018, 19syl 17 . . 3 (𝜑X𝑘𝐴 𝑆X𝑘𝐴 ((cls‘𝑅)‘𝑆))
21 eqid 2651 . . . 4 𝐽 = 𝐽
2221clsss2 20924 . . 3 ((X𝑘𝐴 ((cls‘𝑅)‘𝑆) ∈ (Clsd‘𝐽) ∧ X𝑘𝐴 𝑆X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → ((cls‘𝐽)‘X𝑘𝐴 𝑆) ⊆ X𝑘𝐴 ((cls‘𝑅)‘𝑆))
2315, 20, 22syl2anc 694 . 2 (𝜑 → ((cls‘𝐽)‘X𝑘𝐴 𝑆) ⊆ X𝑘𝐴 ((cls‘𝑅)‘𝑆))
24 vex 3234 . . . . . . . 8 𝑢 ∈ V
25 eqeq1 2655 . . . . . . . . . 10 (𝑥 = 𝑢 → (𝑥 = X𝑦𝐴 (𝑔𝑦) ↔ 𝑢 = X𝑦𝐴 (𝑔𝑦)))
2625anbi2d 740 . . . . . . . . 9 (𝑥 = 𝑢 → (((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦)) ↔ ((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑢 = X𝑦𝐴 (𝑔𝑦))))
2726exbidv 1890 . . . . . . . 8 (𝑥 = 𝑢 → (∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦)) ↔ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑢 = X𝑦𝐴 (𝑔𝑦))))
2824, 27elab 3382 . . . . . . 7 (𝑢 ∈ {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} ↔ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑢 = X𝑦𝐴 (𝑔𝑦)))
29 nffvmpt1 6237 . . . . . . . . . . . . . . . . . 18 𝑘((𝑘𝐴𝑅)‘𝑦)
3029nfel2 2810 . . . . . . . . . . . . . . . . 17 𝑘(𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦)
31 nfv 1883 . . . . . . . . . . . . . . . . 17 𝑦(𝑔𝑘) ∈ ((𝑘𝐴𝑅)‘𝑘)
32 fveq2 6229 . . . . . . . . . . . . . . . . . 18 (𝑦 = 𝑘 → (𝑔𝑦) = (𝑔𝑘))
33 fveq2 6229 . . . . . . . . . . . . . . . . . 18 (𝑦 = 𝑘 → ((𝑘𝐴𝑅)‘𝑦) = ((𝑘𝐴𝑅)‘𝑘))
3432, 33eleq12d 2724 . . . . . . . . . . . . . . . . 17 (𝑦 = 𝑘 → ((𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ↔ (𝑔𝑘) ∈ ((𝑘𝐴𝑅)‘𝑘)))
3530, 31, 34cbvral 3197 . . . . . . . . . . . . . . . 16 (∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ↔ ∀𝑘𝐴 (𝑔𝑘) ∈ ((𝑘𝐴𝑅)‘𝑘))
36 simpr 476 . . . . . . . . . . . . . . . . . . 19 ((𝜑𝑘𝐴) → 𝑘𝐴)
37 eqid 2651 . . . . . . . . . . . . . . . . . . . 20 (𝑘𝐴𝑅) = (𝑘𝐴𝑅)
3837fvmpt2 6330 . . . . . . . . . . . . . . . . . . 19 ((𝑘𝐴𝑅 ∈ (TopOn‘𝑋)) → ((𝑘𝐴𝑅)‘𝑘) = 𝑅)
3936, 2, 38syl2anc 694 . . . . . . . . . . . . . . . . . 18 ((𝜑𝑘𝐴) → ((𝑘𝐴𝑅)‘𝑘) = 𝑅)
4039eleq2d 2716 . . . . . . . . . . . . . . . . 17 ((𝜑𝑘𝐴) → ((𝑔𝑘) ∈ ((𝑘𝐴𝑅)‘𝑘) ↔ (𝑔𝑘) ∈ 𝑅))
4140ralbidva 3014 . . . . . . . . . . . . . . . 16 (𝜑 → (∀𝑘𝐴 (𝑔𝑘) ∈ ((𝑘𝐴𝑅)‘𝑘) ↔ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅))
4235, 41syl5bb 272 . . . . . . . . . . . . . . 15 (𝜑 → (∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ↔ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅))
4342anbi2d 740 . . . . . . . . . . . . . 14 (𝜑 → ((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦)) ↔ (𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅)))
4443adantr 480 . . . . . . . . . . . . 13 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → ((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦)) ↔ (𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅)))
4544biimpa 500 . . . . . . . . . . . 12 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦))) → (𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅))
46 ptclsg.1 . . . . . . . . . . . . . . . 16 (𝜑 𝑘𝐴 𝑆AC 𝐴)
4746ad2antrr 762 . . . . . . . . . . . . . . 15 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → 𝑘𝐴 𝑆AC 𝐴)
48 simpll 805 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → 𝜑)
49 vex 3234 . . . . . . . . . . . . . . . . . . . . . 22 𝑓 ∈ V
5049elixp 7957 . . . . . . . . . . . . . . . . . . . . 21 (𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆) ↔ (𝑓 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆)))
5150simprbi 479 . . . . . . . . . . . . . . . . . . . 20 (𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆) → ∀𝑘𝐴 (𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆))
5251ad2antlr 763 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴 (𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆))
539clsndisj 20927 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝑅 ∈ Top ∧ 𝑆 𝑅 ∧ (𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆)) ∧ ((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘))) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅)
5453ex 449 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑅 ∈ Top ∧ 𝑆 𝑅 ∧ (𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆)) → (((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅))
55543expia 1286 . . . . . . . . . . . . . . . . . . . . 21 ((𝑅 ∈ Top ∧ 𝑆 𝑅) → ((𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆) → (((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅)))
564, 8, 55syl2anc 694 . . . . . . . . . . . . . . . . . . . 20 ((𝜑𝑘𝐴) → ((𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆) → (((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅)))
5756ralimdva 2991 . . . . . . . . . . . . . . . . . . 19 (𝜑 → (∀𝑘𝐴 (𝑓𝑘) ∈ ((cls‘𝑅)‘𝑆) → ∀𝑘𝐴 (((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅)))
5848, 52, 57sylc 65 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴 (((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅))
59 simprlr 820 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅)
60 simprr 811 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → 𝑓X𝑦𝐴 (𝑔𝑦))
6132cbvixpv 7968 . . . . . . . . . . . . . . . . . . . . 21 X𝑦𝐴 (𝑔𝑦) = X𝑘𝐴 (𝑔𝑘)
6260, 61syl6eleq 2740 . . . . . . . . . . . . . . . . . . . 20 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → 𝑓X𝑘𝐴 (𝑔𝑘))
6349elixp 7957 . . . . . . . . . . . . . . . . . . . . 21 (𝑓X𝑘𝐴 (𝑔𝑘) ↔ (𝑓 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑓𝑘) ∈ (𝑔𝑘)))
6463simprbi 479 . . . . . . . . . . . . . . . . . . . 20 (𝑓X𝑘𝐴 (𝑔𝑘) → ∀𝑘𝐴 (𝑓𝑘) ∈ (𝑔𝑘))
6562, 64syl 17 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴 (𝑓𝑘) ∈ (𝑔𝑘))
66 r19.26 3093 . . . . . . . . . . . . . . . . . . 19 (∀𝑘𝐴 ((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) ↔ (∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅 ∧ ∀𝑘𝐴 (𝑓𝑘) ∈ (𝑔𝑘)))
6759, 65, 66sylanbrc 699 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴 ((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)))
68 ralim 2977 . . . . . . . . . . . . . . . . . 18 (∀𝑘𝐴 (((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ((𝑔𝑘) ∩ 𝑆) ≠ ∅) → (∀𝑘𝐴 ((𝑔𝑘) ∈ 𝑅 ∧ (𝑓𝑘) ∈ (𝑔𝑘)) → ∀𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) ≠ ∅))
6958, 67, 68sylc 65 . . . . . . . . . . . . . . . . 17 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) ≠ ∅)
70 rabn0 3991 . . . . . . . . . . . . . . . . . . 19 ({𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆)} ≠ ∅ ↔ ∃𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆))
71 dfin5 3615 . . . . . . . . . . . . . . . . . . . . 21 ( 𝑘𝐴 𝑆 ∩ ((𝑔𝑘) ∩ 𝑆)) = {𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆)}
72 inss2 3867 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑔𝑘) ∩ 𝑆) ⊆ 𝑆
73 ssiun2 4595 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑘𝐴𝑆 𝑘𝐴 𝑆)
7472, 73syl5ss 3647 . . . . . . . . . . . . . . . . . . . . . 22 (𝑘𝐴 → ((𝑔𝑘) ∩ 𝑆) ⊆ 𝑘𝐴 𝑆)
75 sseqin2 3850 . . . . . . . . . . . . . . . . . . . . . 22 (((𝑔𝑘) ∩ 𝑆) ⊆ 𝑘𝐴 𝑆 ↔ ( 𝑘𝐴 𝑆 ∩ ((𝑔𝑘) ∩ 𝑆)) = ((𝑔𝑘) ∩ 𝑆))
7674, 75sylib 208 . . . . . . . . . . . . . . . . . . . . 21 (𝑘𝐴 → ( 𝑘𝐴 𝑆 ∩ ((𝑔𝑘) ∩ 𝑆)) = ((𝑔𝑘) ∩ 𝑆))
7771, 76syl5eqr 2699 . . . . . . . . . . . . . . . . . . . 20 (𝑘𝐴 → {𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆)} = ((𝑔𝑘) ∩ 𝑆))
7877neeq1d 2882 . . . . . . . . . . . . . . . . . . 19 (𝑘𝐴 → ({𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆)} ≠ ∅ ↔ ((𝑔𝑘) ∩ 𝑆) ≠ ∅))
7970, 78syl5bbr 274 . . . . . . . . . . . . . . . . . 18 (𝑘𝐴 → (∃𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆) ↔ ((𝑔𝑘) ∩ 𝑆) ≠ ∅))
8079ralbiia 3008 . . . . . . . . . . . . . . . . 17 (∀𝑘𝐴𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆) ↔ ∀𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) ≠ ∅)
8169, 80sylibr 224 . . . . . . . . . . . . . . . 16 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑘𝐴𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆))
82 nfv 1883 . . . . . . . . . . . . . . . . 17 𝑦𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆)
83 nfiu1 4582 . . . . . . . . . . . . . . . . . 18 𝑘 𝑘𝐴 𝑆
84 nfcv 2793 . . . . . . . . . . . . . . . . . . . 20 𝑘(𝑔𝑦)
85 nfcsb1v 3582 . . . . . . . . . . . . . . . . . . . 20 𝑘𝑦 / 𝑘𝑆
8684, 85nfin 3853 . . . . . . . . . . . . . . . . . . 19 𝑘((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)
8786nfel2 2810 . . . . . . . . . . . . . . . . . 18 𝑘 𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)
8883, 87nfrex 3036 . . . . . . . . . . . . . . . . 17 𝑘𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)
89 fveq2 6229 . . . . . . . . . . . . . . . . . . . 20 (𝑘 = 𝑦 → (𝑔𝑘) = (𝑔𝑦))
90 csbeq1a 3575 . . . . . . . . . . . . . . . . . . . 20 (𝑘 = 𝑦𝑆 = 𝑦 / 𝑘𝑆)
9189, 90ineq12d 3848 . . . . . . . . . . . . . . . . . . 19 (𝑘 = 𝑦 → ((𝑔𝑘) ∩ 𝑆) = ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆))
9291eleq2d 2716 . . . . . . . . . . . . . . . . . 18 (𝑘 = 𝑦 → (𝑧 ∈ ((𝑔𝑘) ∩ 𝑆) ↔ 𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)))
9392rexbidv 3081 . . . . . . . . . . . . . . . . 17 (𝑘 = 𝑦 → (∃𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆) ↔ ∃𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)))
9482, 88, 93cbvral 3197 . . . . . . . . . . . . . . . 16 (∀𝑘𝐴𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑘) ∩ 𝑆) ↔ ∀𝑦𝐴𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆))
9581, 94sylib 208 . . . . . . . . . . . . . . 15 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∀𝑦𝐴𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆))
96 eleq1 2718 . . . . . . . . . . . . . . . 16 (𝑧 = (𝑦) → (𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆) ↔ (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)))
9796acni3 8908 . . . . . . . . . . . . . . 15 (( 𝑘𝐴 𝑆AC 𝐴 ∧ ∀𝑦𝐴𝑧 𝑘𝐴 𝑆𝑧 ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)) → ∃(:𝐴 𝑘𝐴 𝑆 ∧ ∀𝑦𝐴 (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)))
9847, 95, 97syl2anc 694 . . . . . . . . . . . . . 14 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → ∃(:𝐴 𝑘𝐴 𝑆 ∧ ∀𝑦𝐴 (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)))
99 ffn 6083 . . . . . . . . . . . . . . . 16 (:𝐴 𝑘𝐴 𝑆 Fn 𝐴)
100 nfv 1883 . . . . . . . . . . . . . . . . . 18 𝑦(𝑘) ∈ ((𝑔𝑘) ∩ 𝑆)
10186nfel2 2810 . . . . . . . . . . . . . . . . . 18 𝑘(𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)
102 fveq2 6229 . . . . . . . . . . . . . . . . . . 19 (𝑘 = 𝑦 → (𝑘) = (𝑦))
103102, 91eleq12d 2724 . . . . . . . . . . . . . . . . . 18 (𝑘 = 𝑦 → ((𝑘) ∈ ((𝑔𝑘) ∩ 𝑆) ↔ (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)))
104100, 101, 103cbvral 3197 . . . . . . . . . . . . . . . . 17 (∀𝑘𝐴 (𝑘) ∈ ((𝑔𝑘) ∩ 𝑆) ↔ ∀𝑦𝐴 (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆))
105 ne0i 3954 . . . . . . . . . . . . . . . . . 18 (X𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) → X𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) ≠ ∅)
106 vex 3234 . . . . . . . . . . . . . . . . . . 19 ∈ V
107106elixp 7957 . . . . . . . . . . . . . . . . . 18 (X𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) ↔ ( Fn 𝐴 ∧ ∀𝑘𝐴 (𝑘) ∈ ((𝑔𝑘) ∩ 𝑆)))
108 ixpin 7975 . . . . . . . . . . . . . . . . . . . 20 X𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) = (X𝑘𝐴 (𝑔𝑘) ∩ X𝑘𝐴 𝑆)
10961ineq1i 3843 . . . . . . . . . . . . . . . . . . . 20 (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) = (X𝑘𝐴 (𝑔𝑘) ∩ X𝑘𝐴 𝑆)
110108, 109eqtr4i 2676 . . . . . . . . . . . . . . . . . . 19 X𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) = (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆)
111110neeq1i 2887 . . . . . . . . . . . . . . . . . 18 (X𝑘𝐴 ((𝑔𝑘) ∩ 𝑆) ≠ ∅ ↔ (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)
112105, 107, 1113imtr3i 280 . . . . . . . . . . . . . . . . 17 (( Fn 𝐴 ∧ ∀𝑘𝐴 (𝑘) ∈ ((𝑔𝑘) ∩ 𝑆)) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)
113104, 112sylan2br 492 . . . . . . . . . . . . . . . 16 (( Fn 𝐴 ∧ ∀𝑦𝐴 (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)
11499, 113sylan 487 . . . . . . . . . . . . . . 15 ((:𝐴 𝑘𝐴 𝑆 ∧ ∀𝑦𝐴 (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)
115114exlimiv 1898 . . . . . . . . . . . . . 14 (∃(:𝐴 𝑘𝐴 𝑆 ∧ ∀𝑦𝐴 (𝑦) ∈ ((𝑔𝑦) ∩ 𝑦 / 𝑘𝑆)) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)
11698, 115syl 17 . . . . . . . . . . . . 13 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ ((𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅) ∧ 𝑓X𝑦𝐴 (𝑔𝑦))) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)
117116expr 642 . . . . . . . . . . . 12 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑘𝐴 (𝑔𝑘) ∈ 𝑅)) → (𝑓X𝑦𝐴 (𝑔𝑦) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅))
11845, 117syldan 486 . . . . . . . . . . 11 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦))) → (𝑓X𝑦𝐴 (𝑔𝑦) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅))
1191183adantr3 1242 . . . . . . . . . 10 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦))) → (𝑓X𝑦𝐴 (𝑔𝑦) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅))
120 eleq2 2719 . . . . . . . . . . 11 (𝑢 = X𝑦𝐴 (𝑔𝑦) → (𝑓𝑢𝑓X𝑦𝐴 (𝑔𝑦)))
121 ineq1 3840 . . . . . . . . . . . 12 (𝑢 = X𝑦𝐴 (𝑔𝑦) → (𝑢X𝑘𝐴 𝑆) = (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆))
122121neeq1d 2882 . . . . . . . . . . 11 (𝑢 = X𝑦𝐴 (𝑔𝑦) → ((𝑢X𝑘𝐴 𝑆) ≠ ∅ ↔ (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅))
123120, 122imbi12d 333 . . . . . . . . . 10 (𝑢 = X𝑦𝐴 (𝑔𝑦) → ((𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅) ↔ (𝑓X𝑦𝐴 (𝑔𝑦) → (X𝑦𝐴 (𝑔𝑦) ∩ X𝑘𝐴 𝑆) ≠ ∅)))
124119, 123syl5ibrcom 237 . . . . . . . . 9 (((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) ∧ (𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦))) → (𝑢 = X𝑦𝐴 (𝑔𝑦) → (𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅)))
125124expimpd 628 . . . . . . . 8 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → (((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑢 = X𝑦𝐴 (𝑔𝑦)) → (𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅)))
126125exlimdv 1901 . . . . . . 7 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → (∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑢 = X𝑦𝐴 (𝑔𝑦)) → (𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅)))
12728, 126syl5bi 232 . . . . . 6 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → (𝑢 ∈ {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} → (𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅)))
128127ralrimiv 2994 . . . . 5 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → ∀𝑢 ∈ {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} (𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅))
1294, 37fmptd 6425 . . . . . . . . . 10 (𝜑 → (𝑘𝐴𝑅):𝐴⟶Top)
130 ffn 6083 . . . . . . . . . 10 ((𝑘𝐴𝑅):𝐴⟶Top → (𝑘𝐴𝑅) Fn 𝐴)
131129, 130syl 17 . . . . . . . . 9 (𝜑 → (𝑘𝐴𝑅) Fn 𝐴)
132 eqid 2651 . . . . . . . . . 10 {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} = {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))}
133132ptval 21421 . . . . . . . . 9 ((𝐴𝑉 ∧ (𝑘𝐴𝑅) Fn 𝐴) → (∏t‘(𝑘𝐴𝑅)) = (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))}))
1341, 131, 133syl2anc 694 . . . . . . . 8 (𝜑 → (∏t‘(𝑘𝐴𝑅)) = (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))}))
13513, 134syl5eq 2697 . . . . . . 7 (𝜑𝐽 = (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))}))
136135adantr 480 . . . . . 6 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → 𝐽 = (topGen‘{𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))}))
1372ralrimiva 2995 . . . . . . . . 9 (𝜑 → ∀𝑘𝐴 𝑅 ∈ (TopOn‘𝑋))
13813pttopon 21447 . . . . . . . . 9 ((𝐴𝑉 ∧ ∀𝑘𝐴 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘X𝑘𝐴 𝑋))
1391, 137, 138syl2anc 694 . . . . . . . 8 (𝜑𝐽 ∈ (TopOn‘X𝑘𝐴 𝑋))
140 toponuni 20767 . . . . . . . 8 (𝐽 ∈ (TopOn‘X𝑘𝐴 𝑋) → X𝑘𝐴 𝑋 = 𝐽)
141139, 140syl 17 . . . . . . 7 (𝜑X𝑘𝐴 𝑋 = 𝐽)
142141adantr 480 . . . . . 6 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → X𝑘𝐴 𝑋 = 𝐽)
143132ptbas 21430 . . . . . . . 8 ((𝐴𝑉 ∧ (𝑘𝐴𝑅):𝐴⟶Top) → {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} ∈ TopBases)
1441, 129, 143syl2anc 694 . . . . . . 7 (𝜑 → {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} ∈ TopBases)
145144adantr 480 . . . . . 6 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} ∈ TopBases)
1465ralrimiva 2995 . . . . . . . 8 (𝜑 → ∀𝑘𝐴 𝑆𝑋)
147 ss2ixp 7963 . . . . . . . 8 (∀𝑘𝐴 𝑆𝑋X𝑘𝐴 𝑆X𝑘𝐴 𝑋)
148146, 147syl 17 . . . . . . 7 (𝜑X𝑘𝐴 𝑆X𝑘𝐴 𝑋)
149148adantr 480 . . . . . 6 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → X𝑘𝐴 𝑆X𝑘𝐴 𝑋)
1509clsss3 20911 . . . . . . . . . . 11 ((𝑅 ∈ Top ∧ 𝑆 𝑅) → ((cls‘𝑅)‘𝑆) ⊆ 𝑅)
1514, 8, 150syl2anc 694 . . . . . . . . . 10 ((𝜑𝑘𝐴) → ((cls‘𝑅)‘𝑆) ⊆ 𝑅)
152151, 7sseqtr4d 3675 . . . . . . . . 9 ((𝜑𝑘𝐴) → ((cls‘𝑅)‘𝑆) ⊆ 𝑋)
153152ralrimiva 2995 . . . . . . . 8 (𝜑 → ∀𝑘𝐴 ((cls‘𝑅)‘𝑆) ⊆ 𝑋)
154 ss2ixp 7963 . . . . . . . 8 (∀𝑘𝐴 ((cls‘𝑅)‘𝑆) ⊆ 𝑋X𝑘𝐴 ((cls‘𝑅)‘𝑆) ⊆ X𝑘𝐴 𝑋)
155153, 154syl 17 . . . . . . 7 (𝜑X𝑘𝐴 ((cls‘𝑅)‘𝑆) ⊆ X𝑘𝐴 𝑋)
156155sselda 3636 . . . . . 6 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → 𝑓X𝑘𝐴 𝑋)
157136, 142, 145, 149, 156elcls3 20935 . . . . 5 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → (𝑓 ∈ ((cls‘𝐽)‘X𝑘𝐴 𝑆) ↔ ∀𝑢 ∈ {𝑥 ∣ ∃𝑔((𝑔 Fn 𝐴 ∧ ∀𝑦𝐴 (𝑔𝑦) ∈ ((𝑘𝐴𝑅)‘𝑦) ∧ ∃𝑧 ∈ Fin ∀𝑦 ∈ (𝐴𝑧)(𝑔𝑦) = ((𝑘𝐴𝑅)‘𝑦)) ∧ 𝑥 = X𝑦𝐴 (𝑔𝑦))} (𝑓𝑢 → (𝑢X𝑘𝐴 𝑆) ≠ ∅)))
158128, 157mpbird 247 . . . 4 ((𝜑𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆)) → 𝑓 ∈ ((cls‘𝐽)‘X𝑘𝐴 𝑆))
159158ex 449 . . 3 (𝜑 → (𝑓X𝑘𝐴 ((cls‘𝑅)‘𝑆) → 𝑓 ∈ ((cls‘𝐽)‘X𝑘𝐴 𝑆)))
160159ssrdv 3642 . 2 (𝜑X𝑘𝐴 ((cls‘𝑅)‘𝑆) ⊆ ((cls‘𝐽)‘X𝑘𝐴 𝑆))
16123, 160eqssd 3653 1 (𝜑 → ((cls‘𝐽)‘X𝑘𝐴 𝑆) = X𝑘𝐴 ((cls‘𝑅)‘𝑆))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 383   ∧ w3a 1054   = wceq 1523  ∃wex 1744   ∈ wcel 2030  {cab 2637   ≠ wne 2823  ∀wral 2941  ∃wrex 2942  {crab 2945  ⦋csb 3566   ∖ cdif 3604   ∩ cin 3606   ⊆ wss 3607  ∅c0 3948  ∪ cuni 4468  ∪ ciun 4552   ↦ cmpt 4762   Fn wfn 5921  ⟶wf 5922  ‘cfv 5926  Xcixp 7950  Fincfn 7997  AC wacn 8802  topGenctg 16145  ∏tcpt 16146  Topctop 20746  TopOnctopon 20763  TopBasesctb 20797  Clsdccld 20868  clsccl 20870 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991 This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-reu 2948  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-int 4508  df-iun 4554  df-iin 4555  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-1o 7605  df-oadd 7609  df-er 7787  df-map 7901  df-ixp 7951  df-en 7998  df-fin 8001  df-fi 8358  df-acn 8806  df-topgen 16151  df-pt 16152  df-top 20747  df-topon 20764  df-bases 20798  df-cld 20871  df-ntr 20872  df-cls 20873 This theorem is referenced by:  ptcls  21467  dfac14  21469
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