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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 5099 | . . . 4 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 ↔ 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) | |
| 3 | 2 | biimpi 216 | . . 3 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 → 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) |
| 4 | funcrcl 17787 | . . 3 ⊢ (〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸) → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) | |
| 5 | 1, 3, 4 | 3syl 18 | . 2 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) |
| 6 | 5 | simprd 495 | 1 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2113 〈cop 4586 class class class wbr 5098 (class class class)co 7358 Catccat 17587 Func cfunc 17778 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-xp 5630 df-dm 5634 df-iota 6448 df-fv 6500 df-ov 7361 df-oprab 7362 df-mpo 7363 df-func 17782 |
| This theorem is referenced by: imasubc2 49397 imasubc3 49401 upciclem2 49412 upciclem3 49413 upeu2 49417 uobrcl 49438 natoppfb 49476 fuco11 49571 fuco11cl 49572 fuco21 49581 fuco11b 49582 fuco11bALT 49583 fuco22natlem2 49588 fuco22natlem 49590 fucoid 49593 fucocolem1 49598 fucolid 49606 fucorid 49607 postcofval 49609 postcofcl 49610 precofval 49612 precofvalALT 49613 precofcl 49615 prcoftposcurfuco 49628 prcof1 49633 prcof2a 49634 prcof2 49635 prcofdiag1 49638 prcofdiag 49639 fucoppclem 49652 fucoppcid 49653 eufunclem 49766 diag1f1olem 49778 diag2f1olem 49781 lanval 49864 ranval 49865 lanup 49886 ranup 49887 lmdpropd 49902 cmdpropd 49903 concl 49906 coccl 49907 concom 49908 coccom 49909 islmd 49910 iscmd 49911 termolmd 49915 lmdran 49916 cmdlan 49917 |
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