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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 2761 | . . . 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 17821 | . . 3 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋(Inv‘𝐶)𝑌)) |
| 8 | isohom.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 9 | 1, 2, 3, 4, 5, 8 | invss 17817 | . . . 4 ⊢ (𝜑 → (𝑋(Inv‘𝐶)𝑌) ⊆ ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 10 | dmss 5892 | . . . 4 ⊢ ((𝑋(Inv‘𝐶)𝑌) ⊆ ((𝑋𝐻𝑌) × (𝑌𝐻𝑋)) → dom (𝑋(Inv‘𝐶)𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) | |
| 11 | 9, 10 | syl 18 | . . 3 ⊢ (𝜑 → dom (𝑋(Inv‘𝐶)𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 12 | 7, 11 | eqsstrd 3970 | . 2 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 13 | dmxpss 6169 | . 2 ⊢ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋)) ⊆ (𝑋𝐻𝑌) | |
| 14 | 12, 13 | sstrdi 3948 | 1 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ (𝑋𝐻𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1568 ∈ wcel 2141 ⊆ wss 3904 × cxp 5659 dom cdm 5661 ‘cfv 6536 (class class class)co 7410 Basecbs 17268 Hom chom 17320 Catccat 17719 Invcinv 17801 Isociso 17802 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2095 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-oprab 7414 df-mpo 7415 df-1st 7985 df-2nd 7986 df-sect 17803 df-inv 17804 df-iso 17805 |
| This theorem is referenced by: invisoinvl 17846 invcoisoid 17848 isocoinvid 17849 rcaninv 17850 ffthiso 17987 fuciso 18034 initoeu1 18067 initoeu2lem0 18069 initoeu2lem1 18070 initoeu2 18072 termoeu1 18074 nzerooringczr 21609 upeu2lem 49751 upeu 49894 upeu2 49895 thinccic 50194 |
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