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| Mirrors > Home > MPE Home > Th. List > inviso1 | Structured version Visualization version GIF version | ||
| Description: If 𝐺 is an inverse to 𝐹, then 𝐹 is an isomorphism. (Contributed by Mario Carneiro, 3-Jan-2017.) |
| Ref | Expression |
|---|---|
| invfval.b | ⊢ 𝐵 = (Base‘𝐶) |
| invfval.n | ⊢ 𝑁 = (Inv‘𝐶) |
| invfval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| invss.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| invss.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| isoval.n | ⊢ 𝐼 = (Iso‘𝐶) |
| inviso1.1 | ⊢ (𝜑 → 𝐹(𝑋𝑁𝑌)𝐺) |
| Ref | Expression |
|---|---|
| inviso1 | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | invfval.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | invfval.n | . . . . 5 ⊢ 𝑁 = (Inv‘𝐶) | |
| 3 | invfval.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | invss.x | . . . . 5 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | invss.y | . . . . 5 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 6 | 1, 2, 3, 4, 5 | invfun 17677 | . . . 4 ⊢ (𝜑 → Fun (𝑋𝑁𝑌)) |
| 7 | funrel 6504 | . . . 4 ⊢ (Fun (𝑋𝑁𝑌) → Rel (𝑋𝑁𝑌)) | |
| 8 | 6, 7 | syl 17 | . . 3 ⊢ (𝜑 → Rel (𝑋𝑁𝑌)) |
| 9 | inviso1.1 | . . 3 ⊢ (𝜑 → 𝐹(𝑋𝑁𝑌)𝐺) | |
| 10 | releldm 5889 | . . 3 ⊢ ((Rel (𝑋𝑁𝑌) ∧ 𝐹(𝑋𝑁𝑌)𝐺) → 𝐹 ∈ dom (𝑋𝑁𝑌)) | |
| 11 | 8, 9, 10 | syl2anc 584 | . 2 ⊢ (𝜑 → 𝐹 ∈ dom (𝑋𝑁𝑌)) |
| 12 | isoval.n | . . 3 ⊢ 𝐼 = (Iso‘𝐶) | |
| 13 | 1, 2, 3, 4, 5, 12 | isoval 17678 | . 2 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋𝑁𝑌)) |
| 14 | 11, 13 | eleqtrrd 2834 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2111 class class class wbr 5093 dom cdm 5619 Rel wrel 5624 Fun wfun 6481 ‘cfv 6487 (class class class)co 7352 Basecbs 17126 Catccat 17576 Invcinv 17658 Isociso 17659 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-riota 7309 df-ov 7355 df-oprab 7356 df-mpo 7357 df-1st 7927 df-2nd 7928 df-cat 17580 df-cid 17581 df-sect 17660 df-inv 17661 df-iso 17662 |
| This theorem is referenced by: inviso2 17680 isoco 17690 idiso 17701 funciso 17787 ffthiso 17844 fuciso 17891 initoeu1 17924 termoeu1 17931 catciso 18024 yoneda 18195 isoval2 49141 |
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