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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 48865 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 3 | fuco11.k | . . . . 5 ⊢ (𝜑 → 𝐾(𝐷 Func 𝐸)𝐿) | |
| 4 | 3 | funcrcl2 48865 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 5 | 3 | funcrcl3 48866 | . . . 4 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 6 | fuco11.o | . . . 4 ⊢ (𝜑 → (〈𝐶, 𝐷〉 ∘F 𝐸) = 〈𝑂, 𝑃〉) | |
| 7 | eqidd 2735 | . . . 4 ⊢ (𝜑 → ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)) = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) | |
| 8 | 2, 4, 5, 6, 7 | fuco1 48976 | . . 3 ⊢ (𝜑 → 𝑂 = ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))) |
| 9 | 8 | fveq1d 6889 | . 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 48968 | . . 3 ⊢ (𝜑 → 𝑈 ∈ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) |
| 12 | 11 | fvresd 6907 | . 2 ⊢ (𝜑 → (( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))‘𝑈) = ( ∘func ‘𝑈)) |
| 13 | 10 | fveq2d 6891 | . . 3 ⊢ (𝜑 → ( ∘func ‘𝑈) = ( ∘func ‘〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉)) |
| 14 | df-ov 7417 | . . 3 ⊢ (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉) = ( ∘func ‘〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉) | |
| 15 | 13, 14 | eqtr4di 2787 | . 2 ⊢ (𝜑 → ( ∘func ‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| 16 | 9, 12, 15 | 3eqtrd 2773 | 1 ⊢ (𝜑 → (𝑂‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1539 〈cop 4614 class class class wbr 5125 × cxp 5665 ↾ cres 5669 ‘cfv 6542 (class class class)co 7414 Catccat 17679 Func cfunc 17871 ∘func ccofu 17873 ∘F cfuco 48971 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-rep 5261 ax-sep 5278 ax-nul 5288 ax-pow 5347 ax-pr 5414 ax-un 7738 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-ral 3051 df-rex 3060 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3773 df-csb 3882 df-dif 3936 df-un 3938 df-in 3940 df-ss 3950 df-nul 4316 df-if 4508 df-pw 4584 df-sn 4609 df-pr 4611 df-op 4615 df-uni 4890 df-iun 4975 df-br 5126 df-opab 5188 df-mpt 5208 df-id 5560 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-iota 6495 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7997 df-2nd 7998 df-func 17875 df-cofu 17877 df-fuco 48972 |
| This theorem is referenced by: fuco11a 48983 fuco11bALT 48993 precofvalALT 49023 |
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