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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 6853 | . . . . 5 ⊢ (∏t‘𝐹) ∈ V | |
| 2 | 1 | uniex 7695 | . . . 4 ⊢ ∪ (∏t‘𝐹) ∈ V |
| 3 | axac3 10386 | . . . . 5 ⊢ CHOICE | |
| 4 | acufl 23882 | . . . . 5 ⊢ (CHOICE → UFL = V) | |
| 5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ UFL = V |
| 6 | 2, 5 | eleqtrri 2835 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ UFL |
| 7 | cardeqv 10391 | . . . 4 ⊢ dom card = V | |
| 8 | 2, 7 | eleqtrri 2835 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ dom card |
| 9 | 6, 8 | elini 4139 | . 2 ⊢ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card) |
| 10 | eqid 2736 | . . 3 ⊢ (∏t‘𝐹) = (∏t‘𝐹) | |
| 11 | eqid 2736 | . . 3 ⊢ ∪ (∏t‘𝐹) = ∪ (∏t‘𝐹) | |
| 12 | 10, 11 | ptcmpg 24022 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp ∧ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card)) → (∏t‘𝐹) ∈ Comp) |
| 13 | 9, 12 | mp3an3 1453 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp) → (∏t‘𝐹) ∈ Comp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∈ wcel 2114 Vcvv 3429 ∩ cin 3888 ∪ cuni 4850 dom cdm 5631 ⟶wf 6494 ‘cfv 6498 cardccrd 9859 CHOICEwac 10037 ∏tcpt 17401 Compccmp 23351 UFLcufl 23865 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-ac2 10385 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-int 4890 df-iun 4935 df-iin 4936 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-isom 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-rpss 7677 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-2o 8406 df-oadd 8409 df-omul 8410 df-er 8643 df-map 8775 df-ixp 8846 df-en 8894 df-dom 8895 df-fin 8897 df-fi 9324 df-wdom 9480 df-dju 9825 df-card 9863 df-acn 9866 df-ac 10038 df-topgen 17406 df-pt 17407 df-fbas 21349 df-fg 21350 df-top 22859 df-topon 22876 df-bases 22911 df-cld 22984 df-ntr 22985 df-cls 22986 df-nei 23063 df-cmp 23352 df-fil 23811 df-ufil 23866 df-ufl 23867 df-flim 23904 df-fcls 23906 |
| This theorem is referenced by: (None) |
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