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Mirrors > Home > MPE Home > Th. List > coeq1 | Structured version Visualization version GIF version |
Description: Equality theorem for composition of two classes. (Contributed by NM, 3-Jan-1997.) |
Ref | Expression |
---|---|
coeq1 | ⊢ (𝐴 = 𝐵 → (𝐴 ∘ 𝐶) = (𝐵 ∘ 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | coss1 5729 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶)) | |
2 | coss1 5729 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → (𝐵 ∘ 𝐶) ⊆ (𝐴 ∘ 𝐶)) | |
3 | 1, 2 | anim12i 614 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴) → ((𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶) ∧ (𝐵 ∘ 𝐶) ⊆ (𝐴 ∘ 𝐶))) |
4 | eqss 3985 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
5 | eqss 3985 | . 2 ⊢ ((𝐴 ∘ 𝐶) = (𝐵 ∘ 𝐶) ↔ ((𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶) ∧ (𝐵 ∘ 𝐶) ⊆ (𝐴 ∘ 𝐶))) | |
6 | 3, 4, 5 | 3imtr4i 294 | 1 ⊢ (𝐴 = 𝐵 → (𝐴 ∘ 𝐶) = (𝐵 ∘ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1536 ⊆ wss 3939 ∘ ccom 5562 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-in 3946 df-ss 3955 df-br 5070 df-opab 5132 df-co 5567 |
This theorem is referenced by: coeq1i 5733 coeq1d 5735 coi2 6119 funcoeqres 6648 ereq1 8299 domssex2 8680 wemapwe 9163 updjud 9366 seqf1olem2 13413 seqf1o 13414 relexpsucnnl 14394 isps 17815 pwsco1mhm 17999 frmdup3 18035 efmndov 18049 symggrplem 18052 smndex1mndlem 18077 smndex1mnd 18078 pmtr3ncom 18606 psgnunilem1 18624 frgpup3 18907 gsumval3 19030 evlseu 20299 evlsval2 20303 selvval 20334 evls1val 20486 evls1sca 20489 evl1val 20495 mpfpf1 20517 pf1mpf 20518 pf1ind 20521 frgpcyg 20723 frlmup4 20948 xkococnlem 22270 xkococn 22271 cnmpt1k 22293 cnmptkk 22294 xkofvcn 22295 qtopeu 22327 qtophmeo 22428 utop2nei 22862 cncombf 24262 dgrcolem2 24867 dgrco 24868 motplusg 26331 hocsubdir 29565 hoddi 29770 opsqrlem1 29920 smatfval 31064 msubco 32782 coideq 35511 trljco 37880 tgrpov 37888 tendovalco 37905 erngmul 37946 erngmul-rN 37954 cdlemksv 37984 cdlemkuu 38035 cdlemk41 38060 cdleml5N 38120 cdleml9 38124 dvamulr 38152 dvavadd 38155 dvhmulr 38226 dvhvscacbv 38238 dvhvscaval 38239 dih1dimatlem0 38468 dihjatcclem4 38561 diophrw 39362 eldioph2 39365 diophren 39416 mendmulr 39794 fundcmpsurinjpreimafv 43575 rngcinv 44259 rngcinvALTV 44271 ringcinv 44310 ringcinvALTV 44334 |
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