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| Mirrors > Home > MPE Home > Th. List > brcici | Structured version Visualization version GIF version | ||
| Description: Prove that two objects are isomorphic by an explicit isomorphism. (Contributed by AV, 4-Apr-2020.) |
| Ref | Expression |
|---|---|
| cic.i | ⊢ 𝐼 = (Iso‘𝐶) |
| cic.b | ⊢ 𝐵 = (Base‘𝐶) |
| cic.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| cic.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| cic.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| cic.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) |
| Ref | Expression |
|---|---|
| brcici | ⊢ (𝜑 → 𝑋( ≃𝑐 ‘𝐶)𝑌) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cic.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) | |
| 2 | eleq1 2828 | . . . 4 ⊢ (𝑓 = 𝐹 → (𝑓 ∈ (𝑋𝐼𝑌) ↔ 𝐹 ∈ (𝑋𝐼𝑌))) | |
| 3 | 2 | spcegv 3542 | . . 3 ⊢ (𝐹 ∈ (𝑋𝐼𝑌) → (𝐹 ∈ (𝑋𝐼𝑌) → ∃𝑓 𝑓 ∈ (𝑋𝐼𝑌))) |
| 4 | 1, 1, 3 | sylc 65 | . 2 ⊢ (𝜑 → ∃𝑓 𝑓 ∈ (𝑋𝐼𝑌)) |
| 5 | cic.i | . . 3 ⊢ 𝐼 = (Iso‘𝐶) | |
| 6 | cic.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 7 | cic.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 8 | cic.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 9 | cic.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 10 | 5, 6, 7, 8, 9 | cic 17764 | . 2 ⊢ (𝜑 → (𝑋( ≃𝑐 ‘𝐶)𝑌 ↔ ∃𝑓 𝑓 ∈ (𝑋𝐼𝑌))) |
| 11 | 4, 10 | mpbird 258 | 1 ⊢ (𝜑 → 𝑋( ≃𝑐 ‘𝐶)𝑌) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1547 ∃wex 1786 ∈ wcel 2119 class class class wbr 5079 ‘cfv 6492 (class class class)co 7363 Basecbs 17177 Catccat 17628 Isociso 17711 ≃𝑐 ccic 17760 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-rep 5206 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-ral 3055 df-rex 3065 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-iun 4930 df-br 5080 df-opab 5142 df-mpt 5161 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 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-ov 7366 df-oprab 7367 df-mpo 7368 df-1st 7938 df-2nd 7939 df-supp 8108 df-inv 17713 df-iso 17714 df-cic 17761 |
| This theorem is referenced by: cicref 17766 cicsym 17769 cictr 17770 upciclem4 49660 swapciso 49777 fucoppccic 49904 diagcic 50031 |
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