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| Mirrors > Home > MPE Home > Th. List > isohom | Structured version Visualization version GIF version | ||
| Description: An isomorphism is a homomorphism. (Contributed by Mario Carneiro, 27-Jan-2017.) |
| Ref | Expression |
|---|---|
| isohom.b | ⊢ 𝐵 = (Base‘𝐶) |
| isohom.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| isohom.i | ⊢ 𝐼 = (Iso‘𝐶) |
| isohom.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| isohom.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| isohom.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| isohom | ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ (𝑋𝐻𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isohom.b | . . . 4 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | eqid 2764 | . . . 4 ⊢ (Inv‘𝐶) = (Inv‘𝐶) | |
| 3 | isohom.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | isohom.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | isohom.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 6 | isohom.i | . . . 4 ⊢ 𝐼 = (Iso‘𝐶) | |
| 7 | 1, 2, 3, 4, 5, 6 | isoval 17800 | . . 3 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋(Inv‘𝐶)𝑌)) |
| 8 | isohom.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 9 | 1, 2, 3, 4, 5, 8 | invss 17796 | . . . 4 ⊢ (𝜑 → (𝑋(Inv‘𝐶)𝑌) ⊆ ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 10 | dmss 5880 | . . . 4 ⊢ ((𝑋(Inv‘𝐶)𝑌) ⊆ ((𝑋𝐻𝑌) × (𝑌𝐻𝑋)) → dom (𝑋(Inv‘𝐶)𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) | |
| 11 | 9, 10 | syl 17 | . . 3 ⊢ (𝜑 → dom (𝑋(Inv‘𝐶)𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 12 | 7, 11 | eqsstrd 3972 | . 2 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 13 | dmxpss 6159 | . 2 ⊢ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋)) ⊆ (𝑋𝐻𝑌) | |
| 14 | 12, 13 | sstrdi 3950 | 1 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ (𝑋𝐻𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1562 ∈ wcel 2144 ⊆ wss 3906 × cxp 5647 dom cdm 5649 ‘cfv 6523 (class class class)co 7398 Basecbs 17247 Hom chom 17299 Catccat 17698 Invcinv 17780 Isociso 17781 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-rep 5229 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3079 df-rex 3089 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5544 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-ov 7401 df-oprab 7402 df-mpo 7403 df-1st 7972 df-2nd 7973 df-sect 17782 df-inv 17783 df-iso 17784 |
| This theorem is referenced by: invisoinvl 17825 invcoisoid 17827 isocoinvid 17828 rcaninv 17829 ffthiso 17966 fuciso 18013 initoeu1 18046 initoeu2lem0 18048 initoeu2lem1 18049 initoeu2 18051 termoeu1 18053 nzerooringczr 21534 upeu2lem 49654 upeu 49797 upeu2 49798 thinccic 50097 |
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