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| Mirrors > Home > MPE Home > Th. List > idacd | Structured version Visualization version GIF version | ||
| Description: Codomain of the identity arrow. (Contributed by Mario Carneiro, 11-Jan-2017.) |
| Ref | Expression |
|---|---|
| idafval.i | ⊢ 𝐼 = (Ida‘𝐶) |
| idafval.b | ⊢ 𝐵 = (Base‘𝐶) |
| idafval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| idahom.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| Ref | Expression |
|---|---|
| idacd | ⊢ (𝜑 → (coda‘(𝐼‘𝑋)) = 𝑋) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | idafval.i | . . 3 ⊢ 𝐼 = (Ida‘𝐶) | |
| 2 | idafval.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 3 | idafval.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 4 | idahom.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | eqid 2735 | . . 3 ⊢ (Homa‘𝐶) = (Homa‘𝐶) | |
| 6 | 1, 2, 3, 4, 5 | idahom 18073 | . 2 ⊢ (𝜑 → (𝐼‘𝑋) ∈ (𝑋(Homa‘𝐶)𝑋)) |
| 7 | 5 | homacd 18054 | . 2 ⊢ ((𝐼‘𝑋) ∈ (𝑋(Homa‘𝐶)𝑋) → (coda‘(𝐼‘𝑋)) = 𝑋) |
| 8 | 6, 7 | syl 17 | 1 ⊢ (𝜑 → (coda‘(𝐼‘𝑋)) = 𝑋) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2108 ‘cfv 6531 (class class class)co 7405 Basecbs 17228 Catccat 17676 codaccoda 18034 Homachoma 18036 Idacida 18066 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-rep 5249 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-ot 4610 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-id 5548 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7362 df-ov 7408 df-1st 7988 df-2nd 7989 df-cat 17680 df-cid 17681 df-coda 18038 df-homa 18039 df-ida 18068 |
| This theorem is referenced by: (None) |
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