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| Mirrors > Home > MPE Home > Th. List > idiso | Structured version Visualization version GIF version | ||
| Description: The identity is an isomorphism. Example 3.13 of [Adamek] p. 28. (Contributed by AV, 8-Apr-2020.) |
| Ref | Expression |
|---|---|
| invid.b | ⊢ 𝐵 = (Base‘𝐶) |
| invid.i | ⊢ 𝐼 = (Id‘𝐶) |
| invid.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| invid.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| idiso | ⊢ (𝜑 → (𝐼‘𝑋) ∈ (𝑋(Iso‘𝐶)𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | invid.b | . 2 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | eqid 2760 | . 2 ⊢ (Inv‘𝐶) = (Inv‘𝐶) | |
| 3 | invid.c | . 2 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | invid.x | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | eqid 2760 | . 2 ⊢ (Iso‘𝐶) = (Iso‘𝐶) | |
| 6 | invid.i | . . 3 ⊢ 𝐼 = (Id‘𝐶) | |
| 7 | 1, 6, 3, 4 | invid 17971 | . 2 ⊢ (𝜑 → (𝐼‘𝑋)(𝑋(Inv‘𝐶)𝑋)(𝐼‘𝑋)) |
| 8 | 1, 2, 3, 4, 4, 5, 7 | inviso1 17950 | 1 ⊢ (𝜑 → (𝐼‘𝑋) ∈ (𝑋(Iso‘𝐶)𝑋)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ‘cfv 6543 (class class class)co 7424 Basecbs 17396 Catccat 17847 Idccid 17848 Invcinv 17929 Isociso 17930 |
| 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-cat 17851 df-cid 17852 df-sect 17931 df-inv 17932 df-iso 17933 |
| This theorem is used by: invisoinvl 17974 cicref 17985 |
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