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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 6898 | . . . . 5 ⊢ (∏t‘𝐹) ∈ V | |
| 2 | 1 | uniex 7749 | . . . 4 ⊢ ∪ (∏t‘𝐹) ∈ V |
| 3 | axac3 10463 | . . . . 5 ⊢ CHOICE | |
| 4 | acufl 24127 | . . . . 5 ⊢ (CHOICE → UFL = V) | |
| 5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ UFL = V |
| 6 | 2, 5 | eleqtrri 2864 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ UFL |
| 7 | cardeqv 10468 | . . . 4 ⊢ dom card = V | |
| 8 | 2, 7 | eleqtrri 2864 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ dom card |
| 9 | 6, 8 | elini 4152 | . 2 ⊢ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card) |
| 10 | eqid 2765 | . . 3 ⊢ (∏t‘𝐹) = (∏t‘𝐹) | |
| 11 | eqid 2765 | . . 3 ⊢ ∪ (∏t‘𝐹) = ∪ (∏t‘𝐹) | |
| 12 | 10, 11 | ptcmpg 24267 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp ∧ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card)) → (∏t‘𝐹) ∈ Comp) |
| 13 | 9, 12 | mp3an3 1479 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp) → (∏t‘𝐹) ∈ Comp) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 Vcvv 3457 ∩ cin 3905 ∪ cuni 4874 dom cdm 5663 ⟶wf 6536 ‘cfv 6540 cardccrd 9937 CHOICEwac 10115 ∏tcpt 17515 Compccmp 23595 UFLcufl 24110 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-ac2 10462 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-iin 4961 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-rpss 7730 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-2o 8460 df-oadd 8463 df-omul 8464 df-er 8700 df-map 8832 df-ixp 8902 df-en 8950 df-dom 8951 df-fin 8953 df-fi 9378 df-wdom 9534 df-dju 9903 df-card 9941 df-acn 9944 df-ac 10116 df-topgen 17520 df-pt 17521 df-fbas 21571 df-fg 21572 df-top 23103 df-topon 23120 df-bases 23155 df-cld 23228 df-ntr 23229 df-cls 23230 df-nei 23307 df-cmp 23596 df-fil 24056 df-ufil 24111 df-ufl 24112 df-flim 24149 df-fcls 24151 |
| This theorem is used by: (None) |
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