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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fuco11 | Structured version Visualization version GIF version | ||
| Description: The object part of the functor composition bifunctor maps two functors to their composition. (Contributed by Zhi Wang, 30-Sep-2025.) |
| Ref | Expression |
|---|---|
| fuco11.o | ⊢ (𝜑 → (〈𝐶, 𝐷〉 ∘F 𝐸) = 〈𝑂, 𝑃〉) |
| fuco11.f | ⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺) |
| fuco11.k | ⊢ (𝜑 → 𝐾(𝐷 Func 𝐸)𝐿) |
| fuco11.u | ⊢ (𝜑 → 𝑈 = 〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉) |
| Ref | Expression |
|---|---|
| fuco11 | ⊢ (𝜑 → (𝑂‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fuco11.f | . . . . 5 ⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺) | |
| 2 | 1 | funcrcl2 49898 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 3 | fuco11.k | . . . . 5 ⊢ (𝜑 → 𝐾(𝐷 Func 𝐸)𝐿) | |
| 4 | 3 | funcrcl2 49898 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 5 | 3 | funcrcl3 49899 | . . . 4 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 6 | fuco11.o | . . . 4 ⊢ (𝜑 → (〈𝐶, 𝐷〉 ∘F 𝐸) = 〈𝑂, 𝑃〉) | |
| 7 | eqidd 2767 | . . . 4 ⊢ (𝜑 → ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)) = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) | |
| 8 | 2, 4, 5, 6, 7 | fuco1 50140 | . . 3 ⊢ (𝜑 → 𝑂 = ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))) |
| 9 | 8 | fveq1d 6890 | . 2 ⊢ (𝜑 → (𝑂‘𝑈) = (( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))‘𝑈)) |
| 10 | fuco11.u | . . . 4 ⊢ (𝜑 → 𝑈 = 〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉) | |
| 11 | 7, 10, 3, 1 | fuco2eld 50132 | . . 3 ⊢ (𝜑 → 𝑈 ∈ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) |
| 12 | 11 | fvresd 6908 | . 2 ⊢ (𝜑 → (( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))‘𝑈) = ( ∘func ‘𝑈)) |
| 13 | 10 | fveq2d 6892 | . . 3 ⊢ (𝜑 → ( ∘func ‘𝑈) = ( ∘func ‘〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉)) |
| 14 | df-ov 7426 | . . 3 ⊢ (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉) = ( ∘func ‘〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉) | |
| 15 | 13, 14 | eqtr4di 2819 | . 2 ⊢ (𝜑 → ( ∘func ‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| 16 | 9, 12, 15 | 3eqtrd 2805 | 1 ⊢ (𝜑 → (𝑂‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 〈cop 4600 class class class wbr 5114 × cxp 5664 ↾ cres 5668 ‘cfv 6543 (class class class)co 7423 Catccat 17745 Func cfunc 17936 ∘func ccofu 17938 ∘F cfuco 50135 |
| 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 2738 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5341 ax-pr 5409 ax-un 7745 |
| 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 2570 df-eu 2600 df-clab 2745 df-cleq 2758 df-clel 2841 df-nfc 2915 df-ne 2962 df-ral 3083 df-rex 3093 df-reu 3373 df-rab 3420 df-v 3460 df-sbc 3748 df-csb 3857 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-id 5561 df-xp 5672 df-rel 5673 df-cnv 5674 df-co 5675 df-dm 5676 df-rn 5677 df-res 5678 df-ima 5679 df-iota 6499 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-ov 7426 df-oprab 7427 df-mpo 7428 df-1st 7995 df-2nd 7996 df-func 17940 df-cofu 17942 df-fuco 50136 |
| This theorem is used by: fuco11a 50147 fuco11bALT 50157 precofvalALT 50187 |
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