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| Mirrors > Home > MPE Home > Th. List > invid | Structured version Visualization version GIF version | ||
| Description: The inverse of the identity is the identity. (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 |
|---|---|
| invid | ⊢ (𝜑 → (𝐼‘𝑋)(𝑋(Inv‘𝐶)𝑋)(𝐼‘𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | invid.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | invid.i | . . 3 ⊢ 𝐼 = (Id‘𝐶) | |
| 3 | invid.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | invid.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | 1, 2, 3, 4 | sectid 17688 | . 2 ⊢ (𝜑 → (𝐼‘𝑋)(𝑋(Sect‘𝐶)𝑋)(𝐼‘𝑋)) |
| 6 | eqid 2731 | . . 3 ⊢ (Inv‘𝐶) = (Inv‘𝐶) | |
| 7 | eqid 2731 | . . 3 ⊢ (Sect‘𝐶) = (Sect‘𝐶) | |
| 8 | 1, 6, 3, 4, 4, 7 | isinv 17662 | . 2 ⊢ (𝜑 → ((𝐼‘𝑋)(𝑋(Inv‘𝐶)𝑋)(𝐼‘𝑋) ↔ ((𝐼‘𝑋)(𝑋(Sect‘𝐶)𝑋)(𝐼‘𝑋) ∧ (𝐼‘𝑋)(𝑋(Sect‘𝐶)𝑋)(𝐼‘𝑋)))) |
| 9 | 5, 5, 8 | mpbir2and 713 | 1 ⊢ (𝜑 → (𝐼‘𝑋)(𝑋(Inv‘𝐶)𝑋)(𝐼‘𝑋)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2111 class class class wbr 5086 ‘cfv 6476 (class class class)co 7341 Basecbs 17115 Catccat 17565 Idccid 17566 Sectcsect 17646 Invcinv 17647 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5212 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4855 df-iun 4938 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5506 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-1st 7916 df-2nd 7917 df-cat 17569 df-cid 17570 df-sect 17649 df-inv 17650 |
| This theorem is referenced by: idiso 17690 idinv 17691 |
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