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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 5447 | . . 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 2763 | . . 3 ⊢ (Id‘𝐶) = (Id‘𝐶) | |
| 7 | 3, 4, 5, 6 | idafval 18109 | . 2 ⊢ (𝜑 → 𝐼 = (𝑥 ∈ 𝐵 ↦ 〈𝑥, 𝑥, ((Id‘𝐶)‘𝑥)〉)) |
| 8 | idaf.a | . . . 4 ⊢ 𝐴 = (Arrow‘𝐶) | |
| 9 | eqid 2763 | . . . 4 ⊢ (Homa‘𝐶) = (Homa‘𝐶) | |
| 10 | 8, 9 | homarw 18098 | . . 3 ⊢ (𝑥(Homa‘𝐶)𝑥) ⊆ 𝐴 |
| 11 | 5 | adantr 485 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐶 ∈ Cat) |
| 12 | simpr 489 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 13 | 3, 4, 11, 12, 9 | idahom 18112 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐼‘𝑥) ∈ (𝑥(Homa‘𝐶)𝑥)) |
| 14 | 10, 13 | sselid 3935 | . 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝐼‘𝑥) ∈ 𝐴) |
| 15 | 2, 7, 14 | fmpt2d 7120 | 1 ⊢ (𝜑 → 𝐼:𝐵⟶𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1570 ∈ wcel 2143 Vcvv 3455 〈cotp 4597 ⟶wf 6532 ‘cfv 6536 (class class class)co 7410 Basecbs 17264 Catccat 17715 Idccid 17716 Arrowcarw 18074 Homachoma 18075 Idacida 18105 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-ot 4598 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-id 5556 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-cat 17719 df-cid 17720 df-homa 18078 df-arw 18079 df-ida 18107 |
| This theorem is referenced by: (None) |
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