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Mirrors > Home > MPE Home > Th. List > coex | Structured version Visualization version GIF version |
Description: The composition of two sets is a set. (Contributed by NM, 15-Dec-2003.) |
Ref | Expression |
---|---|
coex.1 | ⊢ 𝐴 ∈ V |
coex.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
coex | ⊢ (𝐴 ∘ 𝐵) ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | coex.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | coex.2 | . 2 ⊢ 𝐵 ∈ V | |
3 | coexg 7010 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
4 | 1, 2, 3 | mp2an 704 | 1 ⊢ (𝐴 ∘ 𝐵) ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 Vcvv 3173 ∘ ccom 5042 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 |
This theorem is referenced by: domtr 7895 enfixsn 7954 wdomtr 8363 cfcoflem 8977 axcc3 9143 axdc4uzlem 12644 hashfacen 13095 cofu1st 16366 cofu2nd 16368 cofucl 16371 fucid 16454 symgplusg 17632 gsumzaddlem 18144 evls1fval 19505 evls1val 19506 evl1fval 19513 evl1val 19514 znle 19703 xkococnlem 21272 xkococn 21273 symgtgp 21715 pserulm 23980 imsval 26924 eulerpartgbij 29761 derangenlem 30407 subfacp1lem5 30420 poimirlem9 32588 poimirlem15 32594 poimirlem17 32596 poimirlem20 32599 mbfresfi 32626 tendopl2 35083 erngplus2 35110 erngplus2-rN 35118 dvaplusgv 35316 dvhvaddass 35404 dvhlveclem 35415 diblss 35477 diblsmopel 35478 dicvaddcl 35497 dicvscacl 35498 cdlemn7 35510 dihordlem7 35521 dihopelvalcpre 35555 xihopellsmN 35561 dihopellsm 35562 rabren3dioph 36397 fzisoeu 38455 stirlinglem14 38980 |
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