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Theorem ptcmpfi 21896
Description: A topological product of finitely many compact spaces is compact. This weak version of Tychonoff's theorem does not require the axiom of choice. (Contributed by Mario Carneiro, 8-Feb-2015.)
Assertion
Ref Expression
ptcmpfi ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t𝐹) ∈ Comp)

Proof of Theorem ptcmpfi
Dummy variables 𝑣 𝑢 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ffn 6223 . . . . 5 (𝐹:𝐴⟶Comp → 𝐹 Fn 𝐴)
2 fnresdm 6178 . . . . 5 (𝐹 Fn 𝐴 → (𝐹𝐴) = 𝐹)
31, 2syl 17 . . . 4 (𝐹:𝐴⟶Comp → (𝐹𝐴) = 𝐹)
43adantl 473 . . 3 ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (𝐹𝐴) = 𝐹)
54fveq2d 6379 . 2 ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝐴)) = (∏t𝐹))
6 ssid 3783 . . . 4 𝐴𝐴
7 sseq1 3786 . . . . . 6 (𝑥 = ∅ → (𝑥𝐴 ↔ ∅ ⊆ 𝐴))
8 reseq2 5560 . . . . . . . . . 10 (𝑥 = ∅ → (𝐹𝑥) = (𝐹 ↾ ∅))
9 res0 5569 . . . . . . . . . 10 (𝐹 ↾ ∅) = ∅
108, 9syl6eq 2815 . . . . . . . . 9 (𝑥 = ∅ → (𝐹𝑥) = ∅)
1110fveq2d 6379 . . . . . . . 8 (𝑥 = ∅ → (∏t‘(𝐹𝑥)) = (∏t‘∅))
1211eleq1d 2829 . . . . . . 7 (𝑥 = ∅ → ((∏t‘(𝐹𝑥)) ∈ Comp ↔ (∏t‘∅) ∈ Comp))
1312imbi2d 331 . . . . . 6 (𝑥 = ∅ → (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp) ↔ ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘∅) ∈ Comp)))
147, 13imbi12d 335 . . . . 5 (𝑥 = ∅ → ((𝑥𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp)) ↔ (∅ ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘∅) ∈ Comp))))
15 sseq1 3786 . . . . . 6 (𝑥 = 𝑦 → (𝑥𝐴𝑦𝐴))
16 reseq2 5560 . . . . . . . . 9 (𝑥 = 𝑦 → (𝐹𝑥) = (𝐹𝑦))
1716fveq2d 6379 . . . . . . . 8 (𝑥 = 𝑦 → (∏t‘(𝐹𝑥)) = (∏t‘(𝐹𝑦)))
1817eleq1d 2829 . . . . . . 7 (𝑥 = 𝑦 → ((∏t‘(𝐹𝑥)) ∈ Comp ↔ (∏t‘(𝐹𝑦)) ∈ Comp))
1918imbi2d 331 . . . . . 6 (𝑥 = 𝑦 → (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp) ↔ ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp)))
2015, 19imbi12d 335 . . . . 5 (𝑥 = 𝑦 → ((𝑥𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp)) ↔ (𝑦𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp))))
21 sseq1 3786 . . . . . 6 (𝑥 = (𝑦 ∪ {𝑧}) → (𝑥𝐴 ↔ (𝑦 ∪ {𝑧}) ⊆ 𝐴))
22 reseq2 5560 . . . . . . . . 9 (𝑥 = (𝑦 ∪ {𝑧}) → (𝐹𝑥) = (𝐹 ↾ (𝑦 ∪ {𝑧})))
2322fveq2d 6379 . . . . . . . 8 (𝑥 = (𝑦 ∪ {𝑧}) → (∏t‘(𝐹𝑥)) = (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))))
2423eleq1d 2829 . . . . . . 7 (𝑥 = (𝑦 ∪ {𝑧}) → ((∏t‘(𝐹𝑥)) ∈ Comp ↔ (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))
2524imbi2d 331 . . . . . 6 (𝑥 = (𝑦 ∪ {𝑧}) → (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp) ↔ ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp)))
2621, 25imbi12d 335 . . . . 5 (𝑥 = (𝑦 ∪ {𝑧}) → ((𝑥𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp)) ↔ ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))))
27 sseq1 3786 . . . . . 6 (𝑥 = 𝐴 → (𝑥𝐴𝐴𝐴))
28 reseq2 5560 . . . . . . . . 9 (𝑥 = 𝐴 → (𝐹𝑥) = (𝐹𝐴))
2928fveq2d 6379 . . . . . . . 8 (𝑥 = 𝐴 → (∏t‘(𝐹𝑥)) = (∏t‘(𝐹𝐴)))
3029eleq1d 2829 . . . . . . 7 (𝑥 = 𝐴 → ((∏t‘(𝐹𝑥)) ∈ Comp ↔ (∏t‘(𝐹𝐴)) ∈ Comp))
3130imbi2d 331 . . . . . 6 (𝑥 = 𝐴 → (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp) ↔ ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝐴)) ∈ Comp)))
3227, 31imbi12d 335 . . . . 5 (𝑥 = 𝐴 → ((𝑥𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑥)) ∈ Comp)) ↔ (𝐴𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝐴)) ∈ Comp))))
33 0ex 4950 . . . . . . . . 9 ∅ ∈ V
34 f0 6268 . . . . . . . . 9 ∅:∅⟶Top
35 pttop 21665 . . . . . . . . 9 ((∅ ∈ V ∧ ∅:∅⟶Top) → (∏t‘∅) ∈ Top)
3633, 34, 35mp2an 683 . . . . . . . 8 (∏t‘∅) ∈ Top
37 eqid 2765 . . . . . . . . . . . . 13 (∏t‘∅) = (∏t‘∅)
3837ptuni 21677 . . . . . . . . . . . 12 ((∅ ∈ V ∧ ∅:∅⟶Top) → X𝑥 ∈ ∅ (∅‘𝑥) = (∏t‘∅))
3933, 34, 38mp2an 683 . . . . . . . . . . 11 X𝑥 ∈ ∅ (∅‘𝑥) = (∏t‘∅)
40 ixp0x 8141 . . . . . . . . . . . 12 X𝑥 ∈ ∅ (∅‘𝑥) = {∅}
41 snfi 8245 . . . . . . . . . . . 12 {∅} ∈ Fin
4240, 41eqeltri 2840 . . . . . . . . . . 11 X𝑥 ∈ ∅ (∅‘𝑥) ∈ Fin
4339, 42eqeltrri 2841 . . . . . . . . . 10 (∏t‘∅) ∈ Fin
44 pwfi 8468 . . . . . . . . . 10 ( (∏t‘∅) ∈ Fin ↔ 𝒫 (∏t‘∅) ∈ Fin)
4543, 44mpbi 221 . . . . . . . . 9 𝒫 (∏t‘∅) ∈ Fin
46 pwuni 4632 . . . . . . . . 9 (∏t‘∅) ⊆ 𝒫 (∏t‘∅)
47 ssfi 8387 . . . . . . . . 9 ((𝒫 (∏t‘∅) ∈ Fin ∧ (∏t‘∅) ⊆ 𝒫 (∏t‘∅)) → (∏t‘∅) ∈ Fin)
4845, 46, 47mp2an 683 . . . . . . . 8 (∏t‘∅) ∈ Fin
49 elin 3958 . . . . . . . 8 ((∏t‘∅) ∈ (Top ∩ Fin) ↔ ((∏t‘∅) ∈ Top ∧ (∏t‘∅) ∈ Fin))
5036, 48, 49mpbir2an 702 . . . . . . 7 (∏t‘∅) ∈ (Top ∩ Fin)
51 fincmp 21476 . . . . . . 7 ((∏t‘∅) ∈ (Top ∩ Fin) → (∏t‘∅) ∈ Comp)
5250, 51ax-mp 5 . . . . . 6 (∏t‘∅) ∈ Comp
53522a1i 12 . . . . 5 (∅ ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘∅) ∈ Comp))
54 ssun1 3938 . . . . . . . . 9 𝑦 ⊆ (𝑦 ∪ {𝑧})
55 id 22 . . . . . . . . 9 ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → (𝑦 ∪ {𝑧}) ⊆ 𝐴)
5654, 55syl5ss 3772 . . . . . . . 8 ((𝑦 ∪ {𝑧}) ⊆ 𝐴𝑦𝐴)
5756imim1i 63 . . . . . . 7 ((𝑦𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp)) → ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp)))
58 eqid 2765 . . . . . . . . . . . . . 14 (∏t‘(𝐹𝑦)) = (∏t‘(𝐹𝑦))
59 eqid 2765 . . . . . . . . . . . . . 14 (∏t‘(𝐹 ↾ {𝑧})) = (∏t‘(𝐹 ↾ {𝑧}))
60 eqid 2765 . . . . . . . . . . . . . 14 (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) = (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧})))
61 resabs1 5602 . . . . . . . . . . . . . . . . 17 (𝑦 ⊆ (𝑦 ∪ {𝑧}) → ((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ 𝑦) = (𝐹𝑦))
6254, 61ax-mp 5 . . . . . . . . . . . . . . . 16 ((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ 𝑦) = (𝐹𝑦)
6362eqcomi 2774 . . . . . . . . . . . . . . 15 (𝐹𝑦) = ((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ 𝑦)
6463fveq2i 6378 . . . . . . . . . . . . . 14 (∏t‘(𝐹𝑦)) = (∏t‘((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ 𝑦))
65 ssun2 3939 . . . . . . . . . . . . . . . . 17 {𝑧} ⊆ (𝑦 ∪ {𝑧})
66 resabs1 5602 . . . . . . . . . . . . . . . . 17 ({𝑧} ⊆ (𝑦 ∪ {𝑧}) → ((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ {𝑧}) = (𝐹 ↾ {𝑧}))
6765, 66ax-mp 5 . . . . . . . . . . . . . . . 16 ((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ {𝑧}) = (𝐹 ↾ {𝑧})
6867eqcomi 2774 . . . . . . . . . . . . . . 15 (𝐹 ↾ {𝑧}) = ((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ {𝑧})
6968fveq2i 6378 . . . . . . . . . . . . . 14 (∏t‘(𝐹 ↾ {𝑧})) = (∏t‘((𝐹 ↾ (𝑦 ∪ {𝑧})) ↾ {𝑧}))
70 eqid 2765 . . . . . . . . . . . . . 14 (𝑢 (∏t‘(𝐹𝑦)), 𝑣 (∏t‘(𝐹 ↾ {𝑧})) ↦ (𝑢𝑣)) = (𝑢 (∏t‘(𝐹𝑦)), 𝑣 (∏t‘(𝐹 ↾ {𝑧})) ↦ (𝑢𝑣))
71 vex 3353 . . . . . . . . . . . . . . . 16 𝑦 ∈ V
72 snex 5064 . . . . . . . . . . . . . . . 16 {𝑧} ∈ V
7371, 72unex 7154 . . . . . . . . . . . . . . 15 (𝑦 ∪ {𝑧}) ∈ V
7473a1i 11 . . . . . . . . . . . . . 14 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝑦 ∪ {𝑧}) ∈ V)
75 simplr 785 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → 𝐹:𝐴⟶Comp)
76 cmptop 21478 . . . . . . . . . . . . . . . . 17 (𝑥 ∈ Comp → 𝑥 ∈ Top)
7776ssriv 3765 . . . . . . . . . . . . . . . 16 Comp ⊆ Top
78 fss 6236 . . . . . . . . . . . . . . . 16 ((𝐹:𝐴⟶Comp ∧ Comp ⊆ Top) → 𝐹:𝐴⟶Top)
7975, 77, 78sylancl 580 . . . . . . . . . . . . . . 15 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → 𝐹:𝐴⟶Top)
80 simprr 789 . . . . . . . . . . . . . . 15 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝑦 ∪ {𝑧}) ⊆ 𝐴)
8179, 80fssresd 6253 . . . . . . . . . . . . . 14 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝐹 ↾ (𝑦 ∪ {𝑧})):(𝑦 ∪ {𝑧})⟶Top)
82 eqidd 2766 . . . . . . . . . . . . . 14 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝑦 ∪ {𝑧}) = (𝑦 ∪ {𝑧}))
83 simprl 787 . . . . . . . . . . . . . . 15 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → ¬ 𝑧𝑦)
84 disjsn 4402 . . . . . . . . . . . . . . 15 ((𝑦 ∩ {𝑧}) = ∅ ↔ ¬ 𝑧𝑦)
8583, 84sylibr 225 . . . . . . . . . . . . . 14 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝑦 ∩ {𝑧}) = ∅)
8658, 59, 60, 64, 69, 70, 74, 81, 82, 85ptunhmeo 21891 . . . . . . . . . . . . 13 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝑢 (∏t‘(𝐹𝑦)), 𝑣 (∏t‘(𝐹 ↾ {𝑧})) ↦ (𝑢𝑣)) ∈ (((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧})))Homeo(∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧})))))
87 hmphi 21860 . . . . . . . . . . . . 13 ((𝑢 (∏t‘(𝐹𝑦)), 𝑣 (∏t‘(𝐹 ↾ {𝑧})) ↦ (𝑢𝑣)) ∈ (((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧})))Homeo(∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧})))) → ((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ≃ (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))))
8886, 87syl 17 . . . . . . . . . . . 12 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → ((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ≃ (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))))
891ad2antlr 718 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → 𝐹 Fn 𝐴)
9065, 80syl5ss 3772 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → {𝑧} ⊆ 𝐴)
91 vex 3353 . . . . . . . . . . . . . . . . . 18 𝑧 ∈ V
9291snss 4470 . . . . . . . . . . . . . . . . 17 (𝑧𝐴 ↔ {𝑧} ⊆ 𝐴)
9390, 92sylibr 225 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → 𝑧𝐴)
94 fnressn 6617 . . . . . . . . . . . . . . . 16 ((𝐹 Fn 𝐴𝑧𝐴) → (𝐹 ↾ {𝑧}) = {⟨𝑧, (𝐹𝑧)⟩})
9589, 93, 94syl2anc 579 . . . . . . . . . . . . . . 15 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝐹 ↾ {𝑧}) = {⟨𝑧, (𝐹𝑧)⟩})
9695fveq2d 6379 . . . . . . . . . . . . . 14 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (∏t‘(𝐹 ↾ {𝑧})) = (∏t‘{⟨𝑧, (𝐹𝑧)⟩}))
97 eqid 2765 . . . . . . . . . . . . . . . . 17 (∏t‘{⟨𝑧, (𝐹𝑧)⟩}) = (∏t‘{⟨𝑧, (𝐹𝑧)⟩})
9891a1i 11 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → 𝑧 ∈ V)
9975, 93ffvelrnd 6550 . . . . . . . . . . . . . . . . . . 19 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝐹𝑧) ∈ Comp)
10077, 99sseldi 3759 . . . . . . . . . . . . . . . . . 18 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝐹𝑧) ∈ Top)
101 eqid 2765 . . . . . . . . . . . . . . . . . . 19 (𝐹𝑧) = (𝐹𝑧)
102101toptopon 21001 . . . . . . . . . . . . . . . . . 18 ((𝐹𝑧) ∈ Top ↔ (𝐹𝑧) ∈ (TopOn‘ (𝐹𝑧)))
103100, 102sylib 209 . . . . . . . . . . . . . . . . 17 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝐹𝑧) ∈ (TopOn‘ (𝐹𝑧)))
10497, 98, 103pt1hmeo 21889 . . . . . . . . . . . . . . . 16 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝑥 (𝐹𝑧) ↦ {⟨𝑧, 𝑥⟩}) ∈ ((𝐹𝑧)Homeo(∏t‘{⟨𝑧, (𝐹𝑧)⟩})))
105 hmphi 21860 . . . . . . . . . . . . . . . 16 ((𝑥 (𝐹𝑧) ↦ {⟨𝑧, 𝑥⟩}) ∈ ((𝐹𝑧)Homeo(∏t‘{⟨𝑧, (𝐹𝑧)⟩})) → (𝐹𝑧) ≃ (∏t‘{⟨𝑧, (𝐹𝑧)⟩}))
106104, 105syl 17 . . . . . . . . . . . . . . 15 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (𝐹𝑧) ≃ (∏t‘{⟨𝑧, (𝐹𝑧)⟩}))
107 cmphmph 21871 . . . . . . . . . . . . . . 15 ((𝐹𝑧) ≃ (∏t‘{⟨𝑧, (𝐹𝑧)⟩}) → ((𝐹𝑧) ∈ Comp → (∏t‘{⟨𝑧, (𝐹𝑧)⟩}) ∈ Comp))
108106, 99, 107sylc 65 . . . . . . . . . . . . . 14 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (∏t‘{⟨𝑧, (𝐹𝑧)⟩}) ∈ Comp)
10996, 108eqeltrd 2844 . . . . . . . . . . . . 13 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → (∏t‘(𝐹 ↾ {𝑧})) ∈ Comp)
110 txcmp 21726 . . . . . . . . . . . . . 14 (((∏t‘(𝐹𝑦)) ∈ Comp ∧ (∏t‘(𝐹 ↾ {𝑧})) ∈ Comp) → ((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ∈ Comp)
111110expcom 402 . . . . . . . . . . . . 13 ((∏t‘(𝐹 ↾ {𝑧})) ∈ Comp → ((∏t‘(𝐹𝑦)) ∈ Comp → ((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ∈ Comp))
112109, 111syl 17 . . . . . . . . . . . 12 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → ((∏t‘(𝐹𝑦)) ∈ Comp → ((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ∈ Comp))
113 cmphmph 21871 . . . . . . . . . . . 12 (((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ≃ (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) → (((∏t‘(𝐹𝑦)) ×t (∏t‘(𝐹 ↾ {𝑧}))) ∈ Comp → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))
11488, 112, 113sylsyld 61 . . . . . . . . . . 11 (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) ∧ (¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴)) → ((∏t‘(𝐹𝑦)) ∈ Comp → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))
115114expcom 402 . . . . . . . . . 10 ((¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴) → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → ((∏t‘(𝐹𝑦)) ∈ Comp → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp)))
116115a2d 29 . . . . . . . . 9 ((¬ 𝑧𝑦 ∧ (𝑦 ∪ {𝑧}) ⊆ 𝐴) → (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp) → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp)))
117116ex 401 . . . . . . . 8 𝑧𝑦 → ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → (((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp) → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))))
118117a2d 29 . . . . . . 7 𝑧𝑦 → (((𝑦 ∪ {𝑧}) ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp)) → ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))))
11957, 118syl5 34 . . . . . 6 𝑧𝑦 → ((𝑦𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp)) → ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))))
120119adantl 473 . . . . 5 ((𝑦 ∈ Fin ∧ ¬ 𝑧𝑦) → ((𝑦𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝑦)) ∈ Comp)) → ((𝑦 ∪ {𝑧}) ⊆ 𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹 ↾ (𝑦 ∪ {𝑧}))) ∈ Comp))))
12114, 20, 26, 32, 53, 120findcard2s 8408 . . . 4 (𝐴 ∈ Fin → (𝐴𝐴 → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝐴)) ∈ Comp)))
1226, 121mpi 20 . . 3 (𝐴 ∈ Fin → ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝐴)) ∈ Comp))
123122anabsi5 659 . 2 ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t‘(𝐹𝐴)) ∈ Comp)
1245, 123eqeltrrd 2845 1 ((𝐴 ∈ Fin ∧ 𝐹:𝐴⟶Comp) → (∏t𝐹) ∈ Comp)
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 384   = wceq 1652  wcel 2155  Vcvv 3350  cun 3730  cin 3731  wss 3732  c0 4079  𝒫 cpw 4315  {csn 4334  cop 4340   cuni 4594   class class class wbr 4809  cmpt 4888  cres 5279   Fn wfn 6063  wf 6064  cfv 6068  (class class class)co 6842  cmpt2 6844  Xcixp 8113  Fincfn 8160  tcpt 16367  Topctop 20977  TopOnctopon 20994  Compccmp 21469   ×t ctx 21643  Homeochmeo 21836  chmph 21837
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1890  ax-4 1904  ax-5 2005  ax-6 2070  ax-7 2105  ax-8 2157  ax-9 2164  ax-10 2183  ax-11 2198  ax-12 2211  ax-13 2352  ax-ext 2743  ax-rep 4930  ax-sep 4941  ax-nul 4949  ax-pow 5001  ax-pr 5062  ax-un 7147
This theorem depends on definitions:  df-bi 198  df-an 385  df-or 874  df-3or 1108  df-3an 1109  df-tru 1656  df-ex 1875  df-nf 1879  df-sb 2063  df-mo 2565  df-eu 2582  df-clab 2752  df-cleq 2758  df-clel 2761  df-nfc 2896  df-ne 2938  df-ral 3060  df-rex 3061  df-reu 3062  df-rab 3064  df-v 3352  df-sbc 3597  df-csb 3692  df-dif 3735  df-un 3737  df-in 3739  df-ss 3746  df-pss 3748  df-nul 4080  df-if 4244  df-pw 4317  df-sn 4335  df-pr 4337  df-tp 4339  df-op 4341  df-uni 4595  df-int 4634  df-iun 4678  df-iin 4679  df-br 4810  df-opab 4872  df-mpt 4889  df-tr 4912  df-id 5185  df-eprel 5190  df-po 5198  df-so 5199  df-fr 5236  df-we 5238  df-xp 5283  df-rel 5284  df-cnv 5285  df-co 5286  df-dm 5287  df-rn 5288  df-res 5289  df-ima 5290  df-pred 5865  df-ord 5911  df-on 5912  df-lim 5913  df-suc 5914  df-iota 6031  df-fun 6070  df-fn 6071  df-f 6072  df-f1 6073  df-fo 6074  df-f1o 6075  df-fv 6076  df-ov 6845  df-oprab 6846  df-mpt2 6847  df-om 7264  df-1st 7366  df-2nd 7367  df-wrecs 7610  df-recs 7672  df-rdg 7710  df-1o 7764  df-2o 7765  df-oadd 7768  df-er 7947  df-map 8062  df-ixp 8114  df-en 8161  df-dom 8162  df-sdom 8163  df-fin 8164  df-fi 8524  df-topgen 16372  df-pt 16373  df-top 20978  df-topon 20995  df-bases 21030  df-cn 21311  df-cnp 21312  df-cmp 21470  df-tx 21645  df-hmeo 21838  df-hmph 21839
This theorem is referenced by:  poimirlem30  33795
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