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| Mirrors > Home > MPE Home > Th. List > idaf | Structured version Visualization version GIF version | ||
| Description: The identity arrow function is a function from objects to arrows. (Contributed by Mario Carneiro, 11-Jan-2017.) |
| Ref | Expression |
|---|---|
| idafval.i | ⊢ 𝐼 = (Ida‘𝐶) |
| idafval.b | ⊢ 𝐵 = (Base‘𝐶) |
| idafval.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| idaf.a | ⊢ 𝐴 = (Arrow‘𝐶) |
| Ref | Expression |
|---|---|
| idaf | ⊢ (𝜑 → 𝐼:𝐵⟶𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | otex 5420 | . . 3 ⊢ 〈𝑥, 𝑥, ((Id‘𝐶)‘𝑥)〉 ∈ V | |
| 2 | 1 | a1i 11 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 〈𝑥, 𝑥, ((Id‘𝐶)‘𝑥)〉 ∈ V) |
| 3 | idafval.i | . . 3 ⊢ 𝐼 = (Ida‘𝐶) | |
| 4 | idafval.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 5 | idafval.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 6 | eqid 2729 | . . 3 ⊢ (Id‘𝐶) = (Id‘𝐶) | |
| 7 | 3, 4, 5, 6 | idafval 17995 | . 2 ⊢ (𝜑 → 𝐼 = (𝑥 ∈ 𝐵 ↦ 〈𝑥, 𝑥, ((Id‘𝐶)‘𝑥)〉)) |
| 8 | idaf.a | . . . 4 ⊢ 𝐴 = (Arrow‘𝐶) | |
| 9 | eqid 2729 | . . . 4 ⊢ (Homa‘𝐶) = (Homa‘𝐶) | |
| 10 | 8, 9 | homarw 17984 | . . 3 ⊢ (𝑥(Homa‘𝐶)𝑥) ⊆ 𝐴 |
| 11 | 5 | adantr 480 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ Cat) |
| 12 | simpr 484 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 13 | 3, 4, 11, 12, 9 | idahom 17998 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐼‘𝑥) ∈ (𝑥(Homa‘𝐶)𝑥)) |
| 14 | 10, 13 | sselid 3941 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐼‘𝑥) ∈ 𝐴) |
| 15 | 2, 7, 14 | fmpt2d 7078 | 1 ⊢ (𝜑 → 𝐼:𝐵⟶𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3444 〈cotp 4593 ⟶wf 6495 ‘cfv 6499 (class class class)co 7369 Basecbs 17155 Catccat 17601 Idccid 17602 Arrowcarw 17960 Homachoma 17961 Idacida 17991 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 |
| 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 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-ot 4594 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7326 df-ov 7372 df-cat 17605 df-cid 17606 df-homa 17964 df-arw 17965 df-ida 17993 |
| This theorem is referenced by: (None) |
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