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| Mirrors > Home > MPE Home > Th. List > Mathboxes > funcrcl3 | Structured version Visualization version GIF version | ||
| Description: Reverse closure for a functor. (Contributed by Zhi Wang, 17-Sep-2025.) |
| Ref | Expression |
|---|---|
| funcrcl2.f | ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺) |
| Ref | Expression |
|---|---|
| funcrcl3 | ⊢ (𝜑 → 𝐸 ∈ Cat) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funcrcl2.f | . . 3 ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺) | |
| 2 | df-br 5112 | . . . 4 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 ↔ 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) | |
| 3 | 2 | biimpi 219 | . . 3 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 → 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) |
| 4 | funcrcl 17938 | . . 3 ⊢ (〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸) → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) | |
| 5 | 1, 3, 4 | 3syl 19 | . 2 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) |
| 6 | 5 | simprd 501 | 1 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2146 〈cop 4597 class class class wbr 5111 (class class class)co 7416 Catccat 17738 Func cfunc 17929 |
| 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 2737 ax-sep 5259 ax-nul 5271 ax-pr 5406 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-xp 5669 df-dm 5673 df-iota 6496 df-fv 6548 df-ov 7419 df-oprab 7420 df-mpo 7421 df-func 17933 |
| This theorem is used by: imasubc2 49963 imasubc3 49967 upciclem2 49978 upciclem3 49979 upeu2 49983 uobrcl 50004 natoppfb 50042 fuco11 50137 fuco11cl 50138 fuco21 50147 fuco11b 50148 fuco11bALT 50149 fuco22natlem2 50154 fuco22natlem 50156 fucoid 50159 fucocolem1 50164 fucolid 50172 fucorid 50173 postcofval 50175 postcofcl 50176 precofval 50178 precofvalALT 50179 precofcl 50181 prcoftposcurfuco 50194 prcof1 50199 prcof2a 50200 prcof2 50201 prcofdiag1 50204 prcofdiag 50205 fucoppclem 50218 fucoppcid 50219 eufunclem 50332 diag1f1olem 50344 diag2f1olem 50347 lanval 50430 ranval 50431 lanup 50452 ranup 50453 lmdpropd 50468 cmdpropd 50469 concl 50472 coccl 50473 concom 50474 coccom 50475 islmd 50476 iscmd 50477 termolmd 50481 lmdran 50482 cmdlan 50483 |
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