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Mirrors > Home > MPE Home > Th. List > coexg | Structured version Visualization version GIF version |
Description: The composition of two sets is a set. (Contributed by NM, 19-Mar-1998.) |
Ref | Expression |
---|---|
coexg | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∘ 𝐵) ∈ V) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cossxp 6117 | . 2 ⊢ (𝐴 ∘ 𝐵) ⊆ (dom 𝐵 × ran 𝐴) | |
2 | dmexg 7607 | . . 3 ⊢ (𝐵 ∈ 𝑊 → dom 𝐵 ∈ V) | |
3 | rnexg 7608 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ran 𝐴 ∈ V) | |
4 | xpexg 7467 | . . 3 ⊢ ((dom 𝐵 ∈ V ∧ ran 𝐴 ∈ V) → (dom 𝐵 × ran 𝐴) ∈ V) | |
5 | 2, 3, 4 | syl2anr 598 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (dom 𝐵 × ran 𝐴) ∈ V) |
6 | ssexg 5219 | . 2 ⊢ (((𝐴 ∘ 𝐵) ⊆ (dom 𝐵 × ran 𝐴) ∧ (dom 𝐵 × ran 𝐴) ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
7 | 1, 5, 6 | sylancr 589 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∘ 𝐵) ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2110 Vcvv 3494 ⊆ wss 3935 × cxp 5547 dom cdm 5549 ran crn 5550 ∘ ccom 5553 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 |
This theorem is referenced by: coex 7629 suppco 7864 supp0cosupp0OLD 7867 imacosuppOLD 7869 fsuppco2 8860 fsuppcor 8861 mapfienlem2 8863 wemapwe 9154 cofsmo 9685 relexpsucnnr 14378 supcvg 15205 imasle 16790 setcco 17337 estrcco 17374 pwsco1mhm 17990 pwsco2mhm 17991 efmndov 18040 efmndcl 18041 symgov 18506 symgcl 18507 gsumval3lem2 19020 gsumzf1o 19026 evls1sca 20480 f1lindf 20960 tngds 23251 climcncf 23502 motplusg 26322 tocycfv 30746 smatfval 31055 eulerpartlemmf 31628 hgt750lemg 31920 cossex 35658 tgrpov 37878 erngmul 37936 erngmul-rN 37944 dvamulr 38142 dvavadd 38145 dvhmulr 38216 mendmulr 39781 relexp0a 40054 choicefi 41456 climexp 41879 dvsinax 42190 stoweidlem27 42306 stoweidlem31 42310 stoweidlem59 42338 uspgrbisymrelALT 44024 rngccoALTV 44253 ringccoALTV 44316 |
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