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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 7636 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
4 | 1, 2, 3 | mp2an 690 | 1 ⊢ (𝐴 ∘ 𝐵) ∈ V |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 Vcvv 3496 ∘ ccom 5561 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 |
This theorem is referenced by: domtr 8564 enfixsn 8628 wdomtr 9041 cfcoflem 9696 axcc3 9862 axdc4uzlem 13354 hashfacen 13815 cofu1st 17155 cofu2nd 17157 cofucl 17160 fucid 17243 sursubmefmnd 18063 injsubmefmnd 18064 smndex1mgm 18074 gsumzaddlem 19043 selvval 20333 evls1fval 20484 evls1val 20485 evl1fval 20493 evl1val 20494 cnfldfun 20559 cnfldfunALT 20560 znle 20685 xkococnlem 22269 xkococn 22270 efmndtmd 22711 pserulm 25012 imsval 28464 tocycf 30761 eulerpartgbij 31632 derangenlem 32420 subfacp1lem5 32433 poimirlem9 34903 poimirlem15 34909 poimirlem17 34911 poimirlem20 34914 mbfresfi 34940 tendopl2 37915 erngplus2 37942 erngplus2-rN 37950 dvaplusgv 38148 dvhvaddass 38235 dvhlveclem 38246 diblss 38308 diblsmopel 38309 dicvaddcl 38328 dicvscacl 38329 cdlemn7 38341 dihordlem7 38352 dihopelvalcpre 38386 xihopellsmN 38392 dihopellsm 38393 rabren3dioph 39419 fzisoeu 41574 stirlinglem14 42379 fundcmpsurinjpreimafv 43575 isomushgr 43998 isomgrtr 44011 |
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