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| Mirrors > Home > MPE Home > Th. List > funciso | Structured version Visualization version GIF version | ||
| Description: The image of an isomorphism under a functor is an isomorphism. Proposition 3.21 of [Adamek] p. 32. (Contributed by Mario Carneiro, 3-Jan-2017.) |
| Ref | Expression |
|---|---|
| funciso.b | ⊢ 𝐵 = (Base‘𝐷) |
| funciso.s | ⊢ 𝐼 = (Iso‘𝐷) |
| funciso.t | ⊢ 𝐽 = (Iso‘𝐸) |
| funciso.f | ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺) |
| funciso.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| funciso.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| funciso.m | ⊢ (𝜑 → 𝑀 ∈ (𝑋𝐼𝑌)) |
| Ref | Expression |
|---|---|
| funciso | ⊢ (𝜑 → ((𝑋𝐺𝑌)‘𝑀) ∈ ((𝐹‘𝑋)𝐽(𝐹‘𝑌))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2760 | . 2 ⊢ (Base‘𝐸) = (Base‘𝐸) | |
| 2 | eqid 2760 | . 2 ⊢ (Inv‘𝐸) = (Inv‘𝐸) | |
| 3 | funciso.f | . . . . 5 ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺) | |
| 4 | df-br 5103 | . . . . 5 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 ↔ 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) | |
| 5 | 3, 4 | sylib 221 | . . . 4 ⊢ (𝜑 → 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) |
| 6 | funcrcl 18047 | . . . 4 ⊢ (〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸) → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) | |
| 7 | 5, 6 | syl 18 | . . 3 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) |
| 8 | 7 | simprd 501 | . 2 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 9 | funciso.b | . . . 4 ⊢ 𝐵 = (Base‘𝐷) | |
| 10 | 9, 1, 3 | funcf1 18050 | . . 3 ⊢ (𝜑 → 𝐹:𝐵⟶(Base‘𝐸)) |
| 11 | funciso.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 12 | 10, 11 | ffvelcdmd 7090 | . 2 ⊢ (𝜑 → (𝐹‘𝑋) ∈ (Base‘𝐸)) |
| 13 | funciso.y | . . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 14 | 10, 13 | ffvelcdmd 7090 | . 2 ⊢ (𝜑 → (𝐹‘𝑌) ∈ (Base‘𝐸)) |
| 15 | funciso.t | . 2 ⊢ 𝐽 = (Iso‘𝐸) | |
| 16 | eqid 2760 | . . 3 ⊢ (Inv‘𝐷) = (Inv‘𝐷) | |
| 17 | funciso.s | . . . 4 ⊢ 𝐼 = (Iso‘𝐷) | |
| 18 | 7 | simpld 500 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 19 | funciso.m | . . . 4 ⊢ (𝜑 → 𝑀 ∈ (𝑋𝐼𝑌)) | |
| 20 | 9, 17, 16, 18, 11, 13, 19 | invisoinvr 17975 | . . 3 ⊢ (𝜑 → 𝑀(𝑋(Inv‘𝐷)𝑌)((𝑋(Inv‘𝐷)𝑌)‘𝑀)) |
| 21 | 9, 16, 2, 3, 11, 13, 20 | funcinv 18057 | . 2 ⊢ (𝜑 → ((𝑋𝐺𝑌)‘𝑀)((𝐹‘𝑋)(Inv‘𝐸)(𝐹‘𝑌))((𝑌𝐺𝑋)‘((𝑋(Inv‘𝐷)𝑌)‘𝑀))) |
| 22 | 1, 2, 8, 12, 14, 15, 21 | inviso1 17950 | 1 ⊢ (𝜑 → ((𝑋𝐺𝑌)‘𝑀) ∈ ((𝐹‘𝑋)𝐽(𝐹‘𝑌))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 〈cop 4834 class class class wbr 5102 ‘cfv 6543 (class class class)co 7424 Basecbs 17396 Catccat 17847 Invcinv 17929 Isociso 17930 Func cfunc 18038 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 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 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-1st 8005 df-2nd 8006 df-map 8856 df-ixp 8933 df-cat 17851 df-cid 17852 df-sect 17931 df-inv 17932 df-iso 17933 df-func 18042 |
| This theorem is used by: ffthiso 18115 |
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