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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 7869 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
| 4 | 1, 2, 3 | mp2an 698 | 1 ⊢ (𝐴 ∘ 𝐵) ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2119 Vcvv 3431 ∘ ccom 5622 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-pow 5294 ax-pr 5362 ax-un 7678 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 |
| This theorem is referenced by: domtr 8944 enfixsn 9014 wdomtr 9480 cfcoflem 10185 axcc3 10351 axdc4uzlem 13936 hashfacen 14407 cofu1st 17841 cofu2nd 17843 cofucl 17846 fucid 17932 sursubmefmnd 18855 injsubmefmnd 18856 smndex1mgm 18869 gsumzaddlem 19887 cnfldfun 21361 cnfldfunALT 21362 znle 21511 selvval 22096 evls1fval 22305 evls1val 22306 evl1fval 22314 evl1val 22315 xkococnlem 23642 xkococn 23643 efmndtmd 24084 pserulm 26405 imsval 30774 tocycf 33198 eulerpartgbij 34556 derangenlem 35399 subfacp1lem5 35412 poimirlem9 37996 poimirlem15 38002 poimirlem17 38004 poimirlem20 38007 mbfresfi 38033 tendopl2 41269 erngplus2 41296 erngplus2-rN 41304 dvaplusgv 41502 dvhvaddass 41589 dvhlveclem 41600 diblss 41662 diblsmopel 41663 dicvaddcl 41682 dicvscacl 41683 cdlemn7 41695 dihordlem7 41706 dihopelvalcpre 41740 xihopellsmN 41746 dihopellsm 41747 rabren3dioph 43260 fzisoeu 45748 stirlinglem14 46530 fundcmpsurinjpreimafv 47883 grimco 48380 gricushgr 48408 cycldlenngric 48419 uspgrlim 48483 grlictr 48506 fuco22natlem 49835 |
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