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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 6268 | . 2 ⊢ (𝐴 ∘ 𝐵) ⊆ (dom 𝐵 × ran 𝐴) | |
2 | dmexg 7890 | . . 3 ⊢ (𝐵 ∈ 𝑊 → dom 𝐵 ∈ V) | |
3 | rnexg 7891 | . . 3 ⊢ (𝐴 ∈ 𝑉 → ran 𝐴 ∈ V) | |
4 | xpexg 7733 | . . 3 ⊢ ((dom 𝐵 ∈ V ∧ ran 𝐴 ∈ V) → (dom 𝐵 × ran 𝐴) ∈ V) | |
5 | 2, 3, 4 | syl2anr 597 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (dom 𝐵 × ran 𝐴) ∈ V) |
6 | ssexg 5322 | . 2 ⊢ (((𝐴 ∘ 𝐵) ⊆ (dom 𝐵 × ran 𝐴) ∧ (dom 𝐵 × ran 𝐴) ∈ V) → (𝐴 ∘ 𝐵) ∈ V) | |
7 | 1, 5, 6 | sylancr 587 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∘ 𝐵) ∈ V) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2106 Vcvv 3474 ⊆ wss 3947 × cxp 5673 dom cdm 5675 ran crn 5676 ∘ ccom 5679 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-12 2171 ax-ext 2703 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-clab 2710 df-cleq 2724 df-clel 2810 df-ral 3062 df-rex 3071 df-rab 3433 df-v 3476 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-br 5148 df-opab 5210 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 |
This theorem is referenced by: coex 7917 suppco 8187 fsuppco2 9394 fsuppcor 9395 mapfienlem2 9397 wemapwe 9688 cofsmo 10260 relexpsucnnr 14968 supcvg 15798 imasle 17465 setcco 18029 estrcco 18077 pwsco1mhm 18709 pwsco2mhm 18710 efmndov 18758 efmndcl 18759 symgov 19245 symgcl 19246 gsumval3lem2 19768 gsumzf1o 19774 f1lindf 21368 evls1sca 21833 tngds 24155 tngdsOLD 24156 climcncf 24407 motplusg 27782 tocycfv 32255 smatfval 32763 eulerpartlemmf 33362 hgt750lemg 33654 cossex 37277 tgrpov 39607 erngmul 39665 erngmul-rN 39673 dvamulr 39871 dvavadd 39874 dvhmulr 39945 coexd 41044 mendmulr 41915 relexp0a 42452 choicefi 43884 climexp 44307 dvsinax 44615 stoweidlem27 44729 stoweidlem31 44733 stoweidlem59 44761 uspgrbisymrelALT 46519 rngccoALTV 46839 ringccoALTV 46902 itcoval1 47302 itcoval2 47303 itcoval3 47304 itcovalsucov 47307 |
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