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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 17686 | . . . 4 ⊢ (𝜑 → Fun (𝑋𝑁𝑌)) |
| 7 | funrel 6507 | . . . 4 ⊢ (Fun (𝑋𝑁𝑌) → Rel (𝑋𝑁𝑌)) | |
| 8 | 6, 7 | syl 17 | . . 3 ⊢ (𝜑 → Rel (𝑋𝑁𝑌)) |
| 9 | inviso1.1 | . . 3 ⊢ (𝜑 → 𝐹(𝑋𝑁𝑌)𝐺) | |
| 10 | releldm 5891 | . . 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 17687 | . 2 ⊢ (𝜑 → (𝑋𝐼𝑌) = dom (𝑋𝑁𝑌)) |
| 14 | 11, 13 | eleqtrrd 2837 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 class class class wbr 5096 dom cdm 5622 Rel wrel 5627 Fun wfun 6484 ‘cfv 6490 (class class class)co 7356 Basecbs 17134 Catccat 17585 Invcinv 17667 Isociso 17668 |
| 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 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 |
| 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 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-cat 17589 df-cid 17590 df-sect 17669 df-inv 17670 df-iso 17671 |
| This theorem is referenced by: inviso2 17689 isoco 17699 idiso 17710 funciso 17796 ffthiso 17853 fuciso 17900 initoeu1 17933 termoeu1 17940 catciso 18033 yoneda 18204 isoval2 49222 |
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