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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 5449 | . . 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 2765 | . . 3 ⊢ (Id‘𝐶) = (Id‘𝐶) | |
| 7 | 3, 4, 5, 6 | idafval 18138 | . 2 ⊢ (𝜑 → 𝐼 = (𝑥 ∈ 𝐵 ↦ 〈𝑥, 𝑥, ((Id‘𝐶)‘𝑥)〉)) |
| 8 | idaf.a | . . . 4 ⊢ 𝐴 = (Arrow‘𝐶) | |
| 9 | eqid 2765 | . . . 4 ⊢ (Homa‘𝐶) = (Homa‘𝐶) | |
| 10 | 8, 9 | homarw 18127 | . . 3 ⊢ (𝑥(Homa‘𝐶)𝑥) ⊆ 𝐴 |
| 11 | 5 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ Cat) |
| 12 | simpr 490 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 13 | 3, 4, 11, 12, 9 | idahom 18141 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐼‘𝑥) ∈ (𝑥(Homa‘𝐶)𝑥)) |
| 14 | 10, 13 | sselid 3936 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐼‘𝑥) ∈ 𝐴) |
| 15 | 2, 7, 14 | fmpt2d 7124 | 1 ⊢ (𝜑 → 𝐼:𝐵⟶𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2146 Vcvv 3457 〈cotp 4599 ⟶wf 6536 ‘cfv 6540 (class class class)co 7419 Basecbs 17293 Catccat 17744 Idccid 17745 Arrowcarw 18103 Homachoma 18104 Idacida 18134 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-ot 4600 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-cat 17748 df-cid 17749 df-homa 18107 df-arw 18108 df-ida 18136 |
| This theorem is used by: (None) |
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