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Mirrors > Home > MPE Home > Th. List > rhmco | Structured version Visualization version GIF version |
Description: The composition of ring homomorphisms is a homomorphism. (Contributed by Mario Carneiro, 12-Jun-2015.) |
Ref | Expression |
---|---|
rhmco | ⊢ ((𝐹 ∈ (𝑇 RingHom 𝑈) ∧ 𝐺 ∈ (𝑆 RingHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 RingHom 𝑈)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rhmrcl2 19879 | . . 3 ⊢ (𝐹 ∈ (𝑇 RingHom 𝑈) → 𝑈 ∈ Ring) | |
2 | rhmrcl1 19878 | . . 3 ⊢ (𝐺 ∈ (𝑆 RingHom 𝑇) → 𝑆 ∈ Ring) | |
3 | 1, 2 | anim12ci 613 | . 2 ⊢ ((𝐹 ∈ (𝑇 RingHom 𝑈) ∧ 𝐺 ∈ (𝑆 RingHom 𝑇)) → (𝑆 ∈ Ring ∧ 𝑈 ∈ Ring)) |
4 | rhmghm 19884 | . . . 4 ⊢ (𝐹 ∈ (𝑇 RingHom 𝑈) → 𝐹 ∈ (𝑇 GrpHom 𝑈)) | |
5 | rhmghm 19884 | . . . 4 ⊢ (𝐺 ∈ (𝑆 RingHom 𝑇) → 𝐺 ∈ (𝑆 GrpHom 𝑇)) | |
6 | ghmco 18769 | . . . 4 ⊢ ((𝐹 ∈ (𝑇 GrpHom 𝑈) ∧ 𝐺 ∈ (𝑆 GrpHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) | |
7 | 4, 5, 6 | syl2an 595 | . . 3 ⊢ ((𝐹 ∈ (𝑇 RingHom 𝑈) ∧ 𝐺 ∈ (𝑆 RingHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈)) |
8 | eqid 2738 | . . . . 5 ⊢ (mulGrp‘𝑇) = (mulGrp‘𝑇) | |
9 | eqid 2738 | . . . . 5 ⊢ (mulGrp‘𝑈) = (mulGrp‘𝑈) | |
10 | 8, 9 | rhmmhm 19881 | . . . 4 ⊢ (𝐹 ∈ (𝑇 RingHom 𝑈) → 𝐹 ∈ ((mulGrp‘𝑇) MndHom (mulGrp‘𝑈))) |
11 | eqid 2738 | . . . . 5 ⊢ (mulGrp‘𝑆) = (mulGrp‘𝑆) | |
12 | 11, 8 | rhmmhm 19881 | . . . 4 ⊢ (𝐺 ∈ (𝑆 RingHom 𝑇) → 𝐺 ∈ ((mulGrp‘𝑆) MndHom (mulGrp‘𝑇))) |
13 | mhmco 18377 | . . . 4 ⊢ ((𝐹 ∈ ((mulGrp‘𝑇) MndHom (mulGrp‘𝑈)) ∧ 𝐺 ∈ ((mulGrp‘𝑆) MndHom (mulGrp‘𝑇))) → (𝐹 ∘ 𝐺) ∈ ((mulGrp‘𝑆) MndHom (mulGrp‘𝑈))) | |
14 | 10, 12, 13 | syl2an 595 | . . 3 ⊢ ((𝐹 ∈ (𝑇 RingHom 𝑈) ∧ 𝐺 ∈ (𝑆 RingHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ ((mulGrp‘𝑆) MndHom (mulGrp‘𝑈))) |
15 | 7, 14 | jca 511 | . 2 ⊢ ((𝐹 ∈ (𝑇 RingHom 𝑈) ∧ 𝐺 ∈ (𝑆 RingHom 𝑇)) → ((𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈) ∧ (𝐹 ∘ 𝐺) ∈ ((mulGrp‘𝑆) MndHom (mulGrp‘𝑈)))) |
16 | 11, 9 | isrhm 19880 | . 2 ⊢ ((𝐹 ∘ 𝐺) ∈ (𝑆 RingHom 𝑈) ↔ ((𝑆 ∈ Ring ∧ 𝑈 ∈ Ring) ∧ ((𝐹 ∘ 𝐺) ∈ (𝑆 GrpHom 𝑈) ∧ (𝐹 ∘ 𝐺) ∈ ((mulGrp‘𝑆) MndHom (mulGrp‘𝑈))))) |
17 | 3, 15, 16 | sylanbrc 582 | 1 ⊢ ((𝐹 ∈ (𝑇 RingHom 𝑈) ∧ 𝐺 ∈ (𝑆 RingHom 𝑇)) → (𝐹 ∘ 𝐺) ∈ (𝑆 RingHom 𝑈)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2108 ∘ ccom 5584 ‘cfv 6418 (class class class)co 7255 MndHom cmhm 18343 GrpHom cghm 18746 mulGrpcmgp 19635 Ringcrg 19698 RingHom crh 19871 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-er 8456 df-map 8575 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-sets 16793 df-slot 16811 df-ndx 16823 df-base 16841 df-plusg 16901 df-0g 17069 df-mgm 18241 df-sgrp 18290 df-mnd 18301 df-mhm 18345 df-grp 18495 df-ghm 18747 df-mgp 19636 df-ur 19653 df-ring 19700 df-rnghom 19874 |
This theorem is referenced by: chrrhm 20647 evls1rhm 21398 evl1rhm 21408 selvval2lem2 40151 rhmsubcsetclem2 45468 rhmsubcrngclem2 45474 funcringcsetcALTV2lem9 45490 ringccatidALTV 45498 funcringcsetclem9ALTV 45513 rhmsubclem4 45535 rhmsubcALTVlem4 45553 |
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