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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 2737 | . . . 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 17703 | . . 3 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋(Inv‘𝐶)𝑌)) |
| 8 | isohom.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 9 | 1, 2, 3, 4, 5, 8 | invss 17699 | . . . 4 ⊢ (𝜑 → (𝑋(Inv‘𝐶)𝑌) ⊆ ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 10 | dmss 5861 | . . . 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 3970 | . 2 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 13 | dmxpss 6139 | . 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 1542 ∈ wcel 2114 ⊆ wss 3903 × cxp 5632 dom cdm 5634 ‘cfv 6502 (class class class)co 7370 Basecbs 17150 Hom chom 17202 Catccat 17601 Invcinv 17683 Isociso 17684 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pow 5314 ax-pr 5381 ax-un 7692 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5529 df-xp 5640 df-rel 5641 df-cnv 5642 df-co 5643 df-dm 5644 df-rn 5645 df-res 5646 df-ima 5647 df-iota 6458 df-fun 6504 df-fn 6505 df-f 6506 df-f1 6507 df-fo 6508 df-f1o 6509 df-fv 6510 df-ov 7373 df-oprab 7374 df-mpo 7375 df-1st 7945 df-2nd 7946 df-sect 17685 df-inv 17686 df-iso 17687 |
| This theorem is referenced by: invisoinvl 17728 invcoisoid 17730 isocoinvid 17731 rcaninv 17732 ffthiso 17869 fuciso 17916 initoeu1 17949 initoeu2lem0 17951 initoeu2lem1 17952 initoeu2 17954 termoeu1 17956 nzerooringczr 21452 upeu2lem 49416 upeu 49559 upeu2 49560 thinccic 49859 |
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