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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 5835 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → (𝐴 ∘ 𝐶) ⊆ (𝐵 ∘ 𝐶)) | |
| 2 | coss1 5835 | . . 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 3946 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
| 5 | eqss 3946 | . 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 3899 ∘ ccom 5659 |
| 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 2147 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-ss 3916 df-br 5104 df-opab 5168 df-co 5664 |
| This theorem is used by: coeq1i 5839 coeq1d 5841 coi2 6260 funcoeqres 6850 wrecseq123 8313 ereq1 8705 domssex2 9136 wemapwe 9677 dfttrcl2 9704 updjud 9940 seqf1olem2 14107 seqf1o 14108 relexpsucnnl 15104 isps 18657 pwsco1mhm 18942 frmdup3 18977 efmndov 18991 symggrplem 18994 smndex1mndlem 19022 smndex1mnd 19023 pmtr3ncom 19603 psgnunilem1 19621 frgpup3 19906 gsumval3 20035 rngcinv 20800 ringcinv 20834 frgpcyg 21787 frlmup4 22015 evlseu 22300 evlsval2 22304 evlsval3 22306 selvval 22337 evls1val 22546 evls1sca 22549 evl1val 22555 mpfpf1 22577 pf1mpf 22578 pf1ind 22581 xkococnlem 23886 xkococn 23887 cnmpt1k 23909 cnmptkk 23910 xkofvcn 23911 qtopeu 23943 qtophmeo 24044 utop2nei 24477 cncombf 25887 dgrcolem2 26501 dgrco 26502 motplusg 28885 hocsubdir 32267 hoddi 32472 opsqrlem1 32622 1arithidom 33948 mplvrpmga 34056 mplvrpmrhm 34058 issply 34072 smatfval 34306 msubco 36111 coideq 38997 trljco 41614 tgrpov 41622 tendovalco 41639 erngmul 41680 erngmul-rN 41688 cdlemksv 41718 cdlemkuu 41769 cdlemk41 41794 cdleml5N 41854 cdleml9 41858 dvamulr 41886 dvavadd 41889 dvhmulr 41960 dvhvscacbv 41972 dvhvscaval 41973 dih1dimatlem0 42202 dihjatcclem4 42295 diophrw 43605 eldioph2 43608 diophren 43655 mendmulr 44026 fundcmpsurinjpreimafv 48309 rngcinvALTV 49192 ringcinvALTV 49226 itcoval 49592 setc1ocofval 50421 |
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