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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 50286 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 3 | fuco11.k | . . . . 5 ⊢ (𝜑 → 𝐾(𝐷 Func 𝐸)𝐿) | |
| 4 | 3 | funcrcl2 50286 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 5 | 3 | funcrcl3 50287 | . . . 4 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 6 | fuco11.o | . . . 4 ⊢ (𝜑 → (〈𝐶, 𝐷〉 ∘F 𝐸) = 〈𝑂, 𝑃〉) | |
| 7 | eqidd 2761 | . . . 4 ⊢ (𝜑 → ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)) = ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) | |
| 8 | 2, 4, 5, 6, 7 | fuco1 50536 | . . 3 ⊢ (𝜑 → 𝑂 = ( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))) |
| 9 | 8 | fveq1d 6887 | . 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 50528 | . . 3 ⊢ (𝜑 → 𝑈 ∈ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷))) |
| 12 | 11 | fvresd 6905 | . 2 ⊢ (𝜑 → (( ∘func ↾ ((𝐷 Func 𝐸) × (𝐶 Func 𝐷)))‘𝑈) = ( ∘func ‘𝑈)) |
| 13 | 10 | fveq2d 6889 | . . 3 ⊢ (𝜑 → ( ∘func ‘𝑈) = ( ∘func ‘〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉)) |
| 14 | df-ov 7423 | . . 3 ⊢ (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉) = ( ∘func ‘〈〈𝐾, 𝐿〉, 〈𝐹, 𝐺〉〉) | |
| 15 | 13, 14 | eqtr4di 2813 | . 2 ⊢ (𝜑 → ( ∘func ‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| 16 | 9, 12, 15 | 3eqtrd 2799 | 1 ⊢ (𝜑 → (𝑂‘𝑈) = (〈𝐾, 𝐿〉 ∘func 〈𝐹, 𝐺〉)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 〈cop 4834 class class class wbr 5102 × cxp 5648 ↾ cres 5652 ‘cfv 6538 (class class class)co 7420 Catccat 17843 Func cfunc 18034 ∘func ccofu 18036 ∘F cfuco 50531 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-func 18038 df-cofu 18040 df-fuco 50532 |
| This theorem is used by: fuco11a 50543 fuco11bALT 50553 precofvalALT 50596 |
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