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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 2737 | . 2 ⊢ (Inv‘𝐶) = (Inv‘𝐶) | |
| 3 | invid.c | . 2 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | invid.x | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | eqid 2737 | . 2 ⊢ (Iso‘𝐶) = (Iso‘𝐶) | |
| 6 | invid.i | . . 3 ⊢ 𝐼 = (Id‘𝐶) | |
| 7 | 1, 6, 3, 4 | invid 17743 | . 2 ⊢ (𝜑 → (𝐼‘𝑋)(𝑋(Inv‘𝐶)𝑋)(𝐼‘𝑋)) |
| 8 | 1, 2, 3, 4, 4, 5, 7 | inviso1 17722 | 1 ⊢ (𝜑 → (𝐼‘𝑋) ∈ (𝑋(Iso‘𝐶)𝑋)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 ‘cfv 6490 (class class class)co 7358 Basecbs 17168 Catccat 17619 Idccid 17620 Invcinv 17701 Isociso 17702 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5517 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-1st 7933 df-2nd 7934 df-cat 17623 df-cid 17624 df-sect 17703 df-inv 17704 df-iso 17705 |
| This theorem is referenced by: invisoinvl 17746 cicref 17757 |
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