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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 2761 | . 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 17926 | . 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 17921 | 1 ⊢ (𝜑 → (𝐺(〈𝑋, 𝑌〉 · 𝑍)𝐹) ∈ (𝑋𝐼𝑍)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 〈cop 4590 ‘cfv 6531 (class class class)co 7412 Basecbs 17367 compcco 17420 Catccat 17818 Invcinv 17900 Isociso 17901 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-1st 7990 df-2nd 7991 df-cat 17822 df-cid 17823 df-sect 17902 df-inv 17903 df-iso 17904 |
| This theorem is used by: cictr 17960 |
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