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| Mirrors > Home > MPE Home > Th. List > isoco | Structured version Visualization version GIF version | ||
| Description: The composition of two isomorphisms is an isomorphism. Proposition 3.14(2) of [Adamek] p. 29. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| isoco.b | ⊢ 𝐵 = (Base‘𝐶) |
| isoco.o | ⊢ · = (comp‘𝐶) |
| isoco.n | ⊢ 𝐼 = (Iso‘𝐶) |
| isoco.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| isoco.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| isoco.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| isoco.z | ⊢ (𝜑 → 𝑍 ∈ 𝐵) |
| isoco.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) |
| isoco.g | ⊢ (𝜑 → 𝐺 ∈ (𝑌𝐼𝑍)) |
| Ref | Expression |
|---|---|
| isoco | ⊢ (𝜑 → (𝐺(〈𝑋, 𝑌〉 · 𝑍)𝐹) ∈ (𝑋𝐼𝑍)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isoco.b | . 2 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | eqid 2763 | . 2 ⊢ (Inv‘𝐶) = (Inv‘𝐶) | |
| 3 | isoco.c | . 2 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | isoco.x | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | isoco.z | . 2 ⊢ (𝜑 → 𝑍 ∈ 𝐵) | |
| 6 | isoco.n | . 2 ⊢ 𝐼 = (Iso‘𝐶) | |
| 7 | isoco.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 8 | isoco.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐼𝑌)) | |
| 9 | isoco.o | . . 3 ⊢ · = (comp‘𝐶) | |
| 10 | isoco.g | . . 3 ⊢ (𝜑 → 𝐺 ∈ (𝑌𝐼𝑍)) | |
| 11 | 1, 2, 3, 4, 7, 6, 8, 9, 5, 10 | invco 17829 | . 2 ⊢ (𝜑 → (𝐺(〈𝑋, 𝑌〉 · 𝑍)𝐹)(𝑋(Inv‘𝐶)𝑍)(((𝑋(Inv‘𝐶)𝑌)‘𝐹)(〈𝑍, 𝑌〉 · 𝑋)((𝑌(Inv‘𝐶)𝑍)‘𝐺))) |
| 12 | 1, 2, 3, 4, 5, 6, 11 | inviso1 17824 | 1 ⊢ (𝜑 → (𝐺(〈𝑋, 𝑌〉 · 𝑍)𝐹) ∈ (𝑋𝐼𝑍)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 〈cop 4596 ‘cfv 6538 (class class class)co 7412 Basecbs 17270 compcco 17323 Catccat 17721 Invcinv 17803 Isociso 17804 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5239 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7987 df-2nd 7988 df-cat 17725 df-cid 17726 df-sect 17805 df-inv 17806 df-iso 17807 |
| This theorem is referenced by: cictr 17863 |
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