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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 7880 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
| 4 | 1, 2, 3 | mp2an 693 | 1 ⊢ (𝐴 ∘ 𝐵) ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 Vcvv 3429 ∘ ccom 5635 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 ax-sep 5231 ax-pow 5307 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 |
| This theorem is referenced by: domtr 8954 enfixsn 9024 wdomtr 9490 cfcoflem 10194 axcc3 10360 axdc4uzlem 13945 hashfacen 14416 cofu1st 17850 cofu2nd 17852 cofucl 17855 fucid 17941 sursubmefmnd 18864 injsubmefmnd 18865 smndex1mgm 18878 gsumzaddlem 19896 cnfldfun 21366 cnfldfunALT 21367 znle 21516 selvval 22101 evls1fval 22284 evls1val 22285 evl1fval 22293 evl1val 22294 xkococnlem 23624 xkococn 23625 efmndtmd 24066 pserulm 26387 imsval 30756 tocycf 33178 eulerpartgbij 34516 derangenlem 35353 subfacp1lem5 35366 poimirlem9 37950 poimirlem15 37956 poimirlem17 37958 poimirlem20 37961 mbfresfi 37987 tendopl2 41223 erngplus2 41250 erngplus2-rN 41258 dvaplusgv 41456 dvhvaddass 41543 dvhlveclem 41554 diblss 41616 diblsmopel 41617 dicvaddcl 41636 dicvscacl 41637 cdlemn7 41649 dihordlem7 41660 dihopelvalcpre 41694 xihopellsmN 41700 dihopellsm 41701 rabren3dioph 43243 fzisoeu 45733 stirlinglem14 46515 fundcmpsurinjpreimafv 47868 grimco 48365 gricushgr 48393 cycldlenngric 48404 uspgrlim 48468 grlictr 48491 fuco22natlem 49820 |
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