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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fucof1 | Structured version Visualization version GIF version | ||
| Description: The object part of the functor composition bifunctor maps ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)) into (𝐶 Func 𝐸). (Contributed by Zhi Wang, 29-Sep-2025.) |
| Ref | Expression |
|---|---|
| fucofval.c | ⊢ (𝜑 → 𝐶 ∈ 𝑇) |
| fucofval.d | ⊢ (𝜑 → 𝐷 ∈ 𝑈) |
| fucofval.e | ⊢ (𝜑 → 𝐸 ∈ 𝑉) |
| fuco1.o | ⊢ (𝜑 → (〈𝐶, 𝐷〉 ∘F 𝐸) = 〈𝑂, 𝑃〉) |
| fuco1.w | ⊢ (𝜑 → 𝑊 = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) |
| Ref | Expression |
|---|---|
| fucof1 | ⊢ (𝜑 → 𝑂:𝑊⟶(𝐶 Func 𝐸)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rescofuf 49082 | . 2 ⊢ ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))):((𝐷 Func 𝐸) × (𝐶 Func 𝐷))⟶(𝐶 Func 𝐸) | |
| 2 | fucofval.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ 𝑇) | |
| 3 | fucofval.d | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ 𝑈) | |
| 4 | fucofval.e | . . . . 5 ⊢ (𝜑 → 𝐸 ∈ 𝑉) | |
| 5 | fuco1.o | . . . . 5 ⊢ (𝜑 → (〈𝐶, 𝐷〉 ∘F 𝐸) = 〈𝑂, 𝑃〉) | |
| 6 | fuco1.w | . . . . 5 ⊢ (𝜑 → 𝑊 = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) | |
| 7 | 2, 3, 4, 5, 6 | fuco1 49310 | . . . 4 ⊢ (𝜑 → 𝑂 = ( ∘func ↾ 𝑊)) |
| 8 | 6 | reseq2d 5950 | . . . 4 ⊢ (𝜑 → ( ∘func ↾ 𝑊) = ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))) |
| 9 | 7, 8 | eqtrd 2764 | . . 3 ⊢ (𝜑 → 𝑂 = ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))) |
| 10 | 9, 6 | feq12d 6676 | . 2 ⊢ (𝜑 → (𝑂:𝑊⟶(𝐶 Func 𝐸) ↔ ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))):((𝐷 Func 𝐸) × (𝐶 Func 𝐷))⟶(𝐶 Func 𝐸))) |
| 11 | 1, 10 | mpbiri 258 | 1 ⊢ (𝜑 → 𝑂:𝑊⟶(𝐶 Func 𝐸)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 〈cop 4595 × cxp 5636 ↾ cres 5640 ⟶wf 6507 (class class class)co 7387 Func cfunc 17816 ∘func ccofu 17818 ∘F cfuco 49305 |
| 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 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 |
| 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 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-1st 7968 df-2nd 7969 df-map 8801 df-ixp 8871 df-cat 17629 df-cid 17630 df-func 17820 df-cofu 17822 df-fuco 49306 |
| This theorem is referenced by: fuco11cl 49316 fucofunc 49348 |
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