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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 6848 | . . . . 5 ⊢ (∏t‘𝐹) ∈ V | |
| 2 | 1 | uniex 7689 | . . . 4 ⊢ ∪ (∏t‘𝐹) ∈ V |
| 3 | axac3 10380 | . . . . 5 ⊢ CHOICE | |
| 4 | acufl 23895 | . . . . 5 ⊢ (CHOICE → UFL = V) | |
| 5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ UFL = V |
| 6 | 2, 5 | eleqtrri 2836 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ UFL |
| 7 | cardeqv 10385 | . . . 4 ⊢ dom card = V | |
| 8 | 2, 7 | eleqtrri 2836 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ dom card |
| 9 | 6, 8 | elini 4140 | . 2 ⊢ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card) |
| 10 | eqid 2737 | . . 3 ⊢ (∏t‘𝐹) = (∏t‘𝐹) | |
| 11 | eqid 2737 | . . 3 ⊢ ∪ (∏t‘𝐹) = ∪ (∏t‘𝐹) | |
| 12 | 10, 11 | ptcmpg 24035 | . 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 3430 ∩ cin 3889 ∪ cuni 4851 dom cdm 5625 ⟶wf 6489 ‘cfv 6493 cardccrd 9853 CHOICEwac 10031 ∏tcpt 17395 Compccmp 23364 UFLcufl 23878 |
| 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 2709 ax-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-ac2 10379 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-iin 4937 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-rpss 7671 df-om 7812 df-1st 7936 df-2nd 7937 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-oadd 8403 df-omul 8404 df-er 8637 df-map 8769 df-ixp 8840 df-en 8888 df-dom 8889 df-fin 8891 df-fi 9318 df-wdom 9474 df-dju 9819 df-card 9857 df-acn 9860 df-ac 10032 df-topgen 17400 df-pt 17401 df-fbas 21344 df-fg 21345 df-top 22872 df-topon 22889 df-bases 22924 df-cld 22997 df-ntr 22998 df-cls 22999 df-nei 23076 df-cmp 23365 df-fil 23824 df-ufil 23879 df-ufl 23880 df-flim 23917 df-fcls 23919 |
| This theorem is referenced by: (None) |
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