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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 7905 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
| 4 | 1, 2, 3 | mp2an 702 | 1 ⊢ (𝐴 ∘ 𝐵) ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2141 Vcvv 3453 ∘ ccom 5647 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 ax-sep 5243 ax-pow 5319 ax-pr 5387 ax-un 7713 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-br 5098 df-opab 5160 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 |
| This theorem is referenced by: domtr 8982 enfixsn 9052 wdomtr 9517 cfcoflem 10223 axcc3 10389 axdc4uzlem 13990 hashfacen 14461 cofu1st 17907 cofu2nd 17909 cofucl 17912 fucid 17998 sursubmefmnd 18921 injsubmefmnd 18922 smndex1mgm 18935 gsumzaddlem 19952 cnfldfun 21426 cnfldfunALT 21427 znle 21576 selvval 22161 evls1fval 22370 evls1val 22371 evl1fval 22379 evl1val 22380 xkococnlem 23707 xkococn 23708 efmndtmd 24149 pserulm 26473 imsval 30845 tocycf 33258 eulerpartgbij 34630 derangenlem 35482 subfacp1lem5 35495 poimirlem9 38089 poimirlem15 38095 poimirlem17 38097 poimirlem20 38100 mbfresfi 38126 tendopl2 41362 erngplus2 41389 erngplus2-rN 41397 dvaplusgv 41595 dvhvaddass 41682 dvhlveclem 41693 diblss 41755 diblsmopel 41756 dicvaddcl 41775 dicvscacl 41776 cdlemn7 41788 dihordlem7 41799 dihopelvalcpre 41833 xihopellsmN 41839 dihopellsm 41840 rabren3dioph 43353 fzisoeu 45840 stirlinglem14 46622 fundcmpsurinjpreimafv 47975 grimco 48472 gricushgr 48500 cycldlenngric 48511 uspgrlim 48575 grlictr 48598 fuco22natlem 49927 |
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