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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 6873 | . . . . 5 ⊢ (∏t‘𝐹) ∈ V | |
| 2 | 1 | uniex 7719 | . . . 4 ⊢ ∪ (∏t‘𝐹) ∈ V |
| 3 | axac3 10423 | . . . . 5 ⊢ CHOICE | |
| 4 | acufl 23810 | . . . . 5 ⊢ (CHOICE → UFL = V) | |
| 5 | 3, 4 | ax-mp 5 | . . . 4 ⊢ UFL = V |
| 6 | 2, 5 | eleqtrri 2828 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ UFL |
| 7 | cardeqv 10428 | . . . 4 ⊢ dom card = V | |
| 8 | 2, 7 | eleqtrri 2828 | . . 3 ⊢ ∪ (∏t‘𝐹) ∈ dom card |
| 9 | 6, 8 | elini 4164 | . 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 23950 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp ∧ ∪ (∏t‘𝐹) ∈ (UFL ∩ dom card)) → (∏t‘𝐹) ∈ Comp) |
| 13 | 9, 12 | mp3an3 1452 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐹:𝐴⟶Comp) → (∏t‘𝐹) ∈ Comp) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3450 ∩ cin 3915 ∪ cuni 4873 dom cdm 5640 ⟶wf 6509 ‘cfv 6513 cardccrd 9894 CHOICEwac 10074 ∏tcpt 17407 Compccmp 23279 UFLcufl 23793 |
| 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 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5236 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713 ax-ac2 10422 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3356 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-pss 3936 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-int 4913 df-iun 4959 df-iin 4960 df-br 5110 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-se 5594 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6276 df-ord 6337 df-on 6338 df-lim 6339 df-suc 6340 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-f1 6518 df-fo 6519 df-f1o 6520 df-fv 6521 df-isom 6522 df-riota 7346 df-ov 7392 df-oprab 7393 df-mpo 7394 df-rpss 7701 df-om 7845 df-1st 7970 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8380 df-1o 8436 df-2o 8437 df-oadd 8440 df-omul 8441 df-er 8673 df-map 8803 df-ixp 8873 df-en 8921 df-dom 8922 df-fin 8924 df-fi 9368 df-wdom 9524 df-dju 9860 df-card 9898 df-acn 9901 df-ac 10075 df-topgen 17412 df-pt 17413 df-fbas 21267 df-fg 21268 df-top 22787 df-topon 22804 df-bases 22839 df-cld 22912 df-ntr 22913 df-cls 22914 df-nei 22991 df-cmp 23280 df-fil 23739 df-ufil 23794 df-ufl 23795 df-flim 23832 df-fcls 23834 |
| This theorem is referenced by: (None) |
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