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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 5843 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶)) | |
| 2 | coss1 5843 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → (𝐵 ∘ 𝐶) ⊆ (𝐴 ∘ 𝐶)) | |
| 3 | 1, 2 | anim12i 625 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴) → ((𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶) ∧ (𝐵 ∘ 𝐶) ⊆ (𝐴 ∘ 𝐶))) |
| 4 | eqss 3953 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
| 5 | eqss 3953 | . 2 ⊢ ((𝐴 ∘ 𝐶) = (𝐵 ∘ 𝐶) ↔ ((𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶) ∧ (𝐵 ∘ 𝐶) ⊆ (𝐴 ∘ 𝐶))) | |
| 6 | 3, 4, 5 | 3imtr4i 295 | 1 ⊢ (𝐴 = 𝐵 → (𝐴 ∘ 𝐶) = (𝐵 ∘ 𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ⊆ wss 3906 ∘ ccom 5667 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ss 3923 df-br 5112 df-opab 5176 df-co 5672 |
| This theorem is used by: coeq1i 5847 coeq1d 5849 coi2 6267 funcoeqres 6856 wrecseq123 8316 ereq1 8708 domssex2 9132 wemapwe 9673 dfttrcl2 9700 updjud 9936 seqf1olem2 14098 seqf1o 14099 relexpsucnnl 15093 isps 18648 pwsco1mhm 18930 frmdup3 18965 efmndov 18979 symggrplem 18982 smndex1mndlem 19010 smndex1mnd 19011 pmtr3ncom 19591 psgnunilem1 19609 frgpup3 19894 gsumval3 20023 rngcinv 20788 ringcinv 20822 frgpcyg 21775 frlmup4 22003 evlseu 22286 evlsval2 22290 evlsval3 22292 selvval 22323 evls1val 22532 evls1sca 22535 evl1val 22541 mpfpf1 22563 pf1mpf 22564 pf1ind 22567 xkococnlem 23869 xkococn 23870 cnmpt1k 23892 cnmptkk 23893 xkofvcn 23894 qtopeu 23926 qtophmeo 24027 utop2nei 24460 cncombf 25870 dgrcolem2 26484 dgrco 26485 motplusg 28864 hocsubdir 32210 hoddi 32415 opsqrlem1 32565 1arithidom 33893 mplvrpmga 34001 mplvrpmrhm 34003 issply 34017 smatfval 34251 msubco 36062 coideq 38957 trljco 41574 tgrpov 41582 tendovalco 41599 erngmul 41640 erngmul-rN 41648 cdlemksv 41678 cdlemkuu 41729 cdlemk41 41754 cdleml5N 41814 cdleml9 41818 dvamulr 41846 dvavadd 41849 dvhmulr 41920 dvhvscacbv 41932 dvhvscaval 41933 dih1dimatlem0 42162 dihjatcclem4 42255 diophrw 43550 eldioph2 43553 diophren 43600 mendmulr 43971 fundcmpsurinjpreimafv 48217 rngcinvALTV 49100 ringcinvALTV 49134 itcoval 49500 setc1ocofval 50331 |
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