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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 7928 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
| 4 | 1, 2, 3 | mp2an 705 | 1 ⊢ (𝐴 ∘ 𝐵) ∈ V |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 Vcvv 3457 ∘ ccom 5667 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pow 5338 ax-pr 5406 ax-un 7738 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 |
| This theorem is used by: domtr 9006 enfixsn 9077 wdomtr 9540 cfcoflem 10267 axcc3 10433 axdc4uzlem 14033 hashfacen 14505 cofu1st 17958 cofu2nd 17960 cofucl 17963 fucid 18049 sursubmefmnd 18979 injsubmefmnd 18980 smndex1mgm 18993 gsumzaddlem 20015 cnfldfun 21566 cnfldfunALT 21567 znle 21716 selvval 22301 evls1fval 22509 evls1val 22510 evl1fval 22518 evl1val 22519 xkococnlem 23847 xkococn 23848 efmndtmd 24289 pserulm 26616 imsval 31084 tocycf 33477 eulerpartgbij 34803 derangenlem 35676 subfacp1lem5 35689 poimirlem9 38313 poimirlem15 38319 poimirlem17 38321 poimirlem20 38324 mbfresfi 38350 tendopl2 41584 erngplus2 41611 erngplus2-rN 41619 dvaplusgv 41817 dvhvaddass 41904 dvhlveclem 41915 diblss 41977 diblsmopel 41978 dicvaddcl 41997 dicvscacl 41998 cdlemn7 42010 dihordlem7 42021 dihopelvalcpre 42055 xihopellsmN 42061 dihopellsm 42062 rabren3dioph 43575 fzisoeu 46052 stirlinglem14 46834 fundcmpsurinjpreimafv 48190 grimco 48687 gricushgr 48715 cycldlenngric 48726 uspgrlim 48790 grlictr 48813 fuco22natlem 50156 |
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