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Mirrors > Home > MPE Home > Th. List > ptcmp | Structured version Visualization version GIF version |
Description: Tychonoff's theorem: The product of compact spaces is compact. The proof uses the Axiom of Choice. (Contributed by Mario Carneiro, 26-Aug-2015.) |
Ref | Expression |
---|---|
ptcmp | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp) → (∏t‘𝐹) ∈ Comp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fvex 6905 | . . . . 5 ⊢ (∏t‘𝐹) ∈ V | |
2 | 1 | uniex 7735 | . . . 4 ⊢ ∪ (∏t‘𝐹) ∈ V |
3 | axac3 10463 | . . . . 5 ⊢ CHOICE | |
4 | acufl 23643 | . . . . 5 ⊢ (CHOICE → UFL = V) | |
5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ UFL = V |
6 | 2, 5 | eleqtrri 2830 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ UFL |
7 | cardeqv 10468 | . . . 4 ⊢ dom card = V | |
8 | 2, 7 | eleqtrri 2830 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ dom card |
9 | 6, 8 | elini 4194 | . 2 ⊢ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card) |
10 | eqid 2730 | . . 3 ⊢ (∏t‘𝐹) = (∏t‘𝐹) | |
11 | eqid 2730 | . . 3 ⊢ ∪ (∏t‘𝐹) = ∪ (∏t‘𝐹) | |
12 | 10, 11 | ptcmpg 23783 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp ∧ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card)) → (∏t‘𝐹) ∈ Comp) |
13 | 9, 12 | mp3an3 1448 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp) → (∏t‘𝐹) ∈ Comp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 394 = wceq 1539 ∈ wcel 2104 Vcvv 3472 ∩ cin 3948 ∪ cuni 4909 dom cdm 5677 ⟶wf 6540 ‘cfv 6544 cardccrd 9934 CHOICEwac 10114 ∏tcpt 17390 Compccmp 23112 UFLcufl 23626 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7729 ax-ac2 10462 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-iin 5001 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-se 5633 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-isom 6553 df-riota 7369 df-ov 7416 df-oprab 7417 df-mpo 7418 df-rpss 7717 df-om 7860 df-1st 7979 df-2nd 7980 df-frecs 8270 df-wrecs 8301 df-recs 8375 df-rdg 8414 df-1o 8470 df-oadd 8474 df-omul 8475 df-er 8707 df-map 8826 df-ixp 8896 df-en 8944 df-dom 8945 df-fin 8947 df-fi 9410 df-wdom 9564 df-dju 9900 df-card 9938 df-acn 9941 df-ac 10115 df-topgen 17395 df-pt 17396 df-fbas 21143 df-fg 21144 df-top 22618 df-topon 22635 df-bases 22671 df-cld 22745 df-ntr 22746 df-cls 22747 df-nei 22824 df-cmp 23113 df-fil 23572 df-ufil 23627 df-ufl 23628 df-flim 23665 df-fcls 23667 |
This theorem is referenced by: (None) |
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