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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 17693 | . . 3 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋(Inv‘𝐶)𝑌)) |
| 8 | isohom.h | . . . . 5 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 9 | 1, 2, 3, 4, 5, 8 | invss 17689 | . . . 4 ⊢ (𝜑 → (𝑋(Inv‘𝐶)𝑌) ⊆ ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 10 | dmss 5852 | . . . 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 3969 | . 2 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋))) |
| 13 | dmxpss 6130 | . 2 ⊢ dom ((𝑋𝐻𝑌) × (𝑌𝐻𝑋)) ⊆ (𝑋𝐻𝑌) | |
| 14 | 12, 13 | sstrdi 3947 | 1 ⊢ (𝜑 → (𝑋𝐼𝑌) ⊆ (𝑋𝐻𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ⊆ wss 3902 × cxp 5623 dom cdm 5625 ‘cfv 6493 (class class class)co 7360 Basecbs 17140 Hom chom 17192 Catccat 17591 Invcinv 17673 Isociso 17674 |
| 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 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 |
| 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 3062 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-sect 17675 df-inv 17676 df-iso 17677 |
| This theorem is referenced by: invisoinvl 17718 invcoisoid 17720 isocoinvid 17721 rcaninv 17722 ffthiso 17859 fuciso 17906 initoeu1 17939 initoeu2lem0 17941 initoeu2lem1 17942 initoeu2 17944 termoeu1 17946 nzerooringczr 21439 upeu2lem 49340 upeu 49483 upeu2 49484 thinccic 49783 |
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