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| Mirrors > Home > MPE Home > Th. List > funcf1 | Structured version Visualization version GIF version | ||
| Description: The object part of a functor is a function on objects. (Contributed by Mario Carneiro, 2-Jan-2017.) |
| Ref | Expression |
|---|---|
| funcf1.b | ⊢ 𝐵 = (Base‘𝐷) |
| funcf1.c | ⊢ 𝐶 = (Base‘𝐸) |
| funcf1.f | ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺) |
| Ref | Expression |
|---|---|
| funcf1 | ⊢ (𝜑 → 𝐹:𝐵⟶𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funcf1.f | . . 3 ⊢ (𝜑 → 𝐹(𝐷 Func 𝐸)𝐺) | |
| 2 | funcf1.b | . . . 4 ⊢ 𝐵 = (Base‘𝐷) | |
| 3 | funcf1.c | . . . 4 ⊢ 𝐶 = (Base‘𝐸) | |
| 4 | eqid 2740 | . . . 4 ⊢ (Hom ‘𝐷) = (Hom ‘𝐷) | |
| 5 | eqid 2740 | . . . 4 ⊢ (Hom ‘𝐸) = (Hom ‘𝐸) | |
| 6 | eqid 2740 | . . . 4 ⊢ (Id‘𝐷) = (Id‘𝐷) | |
| 7 | eqid 2740 | . . . 4 ⊢ (Id‘𝐸) = (Id‘𝐸) | |
| 8 | eqid 2740 | . . . 4 ⊢ (comp‘𝐷) = (comp‘𝐷) | |
| 9 | eqid 2740 | . . . 4 ⊢ (comp‘𝐸) = (comp‘𝐸) | |
| 10 | df-br 5080 | . . . . . . 7 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 ↔ 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) | |
| 11 | 1, 10 | sylib 219 | . . . . . 6 ⊢ (𝜑 → 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) |
| 12 | funcrcl 17828 | . . . . . 6 ⊢ (〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸) → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) | |
| 13 | 11, 12 | syl 17 | . . . . 5 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) |
| 14 | 13 | simpld 495 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 15 | 13 | simprd 496 | . . . 4 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 16 | 2, 3, 4, 5, 6, 7, 8, 9, 14, 15 | isfunc 17829 | . . 3 ⊢ (𝜑 → (𝐹(𝐷 Func 𝐸)𝐺 ↔ (𝐹:𝐵⟶𝐶 ∧ 𝐺 ∈ X𝑧 ∈ (𝐵 × 𝐵)(((𝐹‘(1st ‘𝑧))(Hom ‘𝐸)(𝐹‘(2nd ‘𝑧))) ↑m ((Hom ‘𝐷)‘𝑧)) ∧ ∀𝑥 ∈ 𝐵 (((𝑥𝐺𝑥)‘((Id‘𝐷)‘𝑥)) = ((Id‘𝐸)‘(𝐹‘𝑥)) ∧ ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑚 ∈ (𝑥(Hom ‘𝐷)𝑦)∀𝑛 ∈ (𝑦(Hom ‘𝐷)𝑧)((𝑥𝐺𝑧)‘(𝑛(〈𝑥, 𝑦〉(comp‘𝐷)𝑧)𝑚)) = (((𝑦𝐺𝑧)‘𝑛)(〈(𝐹‘𝑥), (𝐹‘𝑦)〉(comp‘𝐸)(𝐹‘𝑧))((𝑥𝐺𝑦)‘𝑚)))))) |
| 17 | 1, 16 | mpbid 233 | . 2 ⊢ (𝜑 → (𝐹:𝐵⟶𝐶 ∧ 𝐺 ∈ X𝑧 ∈ (𝐵 × 𝐵)(((𝐹‘(1st ‘𝑧))(Hom ‘𝐸)(𝐹‘(2nd ‘𝑧))) ↑m ((Hom ‘𝐷)‘𝑧)) ∧ ∀𝑥 ∈ 𝐵 (((𝑥𝐺𝑥)‘((Id‘𝐷)‘𝑥)) = ((Id‘𝐸)‘(𝐹‘𝑥)) ∧ ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑚 ∈ (𝑥(Hom ‘𝐷)𝑦)∀𝑛 ∈ (𝑦(Hom ‘𝐷)𝑧)((𝑥𝐺𝑧)‘(𝑛(〈𝑥, 𝑦〉(comp‘𝐷)𝑧)𝑚)) = (((𝑦𝐺𝑧)‘𝑛)(〈(𝐹‘𝑥), (𝐹‘𝑦)〉(comp‘𝐸)(𝐹‘𝑧))((𝑥𝐺𝑦)‘𝑚))))) |
| 18 | 17 | simp1d 1148 | 1 ⊢ (𝜑 → 𝐹:𝐵⟶𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 ∧ w3a 1092 = wceq 1547 ∈ wcel 2119 ∀wral 3054 〈cop 4568 class class class wbr 5079 × cxp 5623 ⟶wf 6488 ‘cfv 6492 (class class class)co 7363 1st c1st 7936 2nd c2nd 7937 ↑m cmap 8770 Xcixp 8842 Basecbs 17177 Hom chom 17229 compcco 17230 Catccat 17628 Idccid 17629 Func cfunc 17819 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-rep 5206 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-iun 4930 df-br 5080 df-opab 5142 df-mpt 5161 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-fv 6500 df-ov 7366 df-oprab 7367 df-mpo 7368 df-map 8772 df-ixp 8843 df-func 17823 |
| This theorem is referenced by: funcsect 17837 funcinv 17838 funciso 17839 funcoppc 17840 cofu1 17849 cofucl 17853 cofuass 17854 cofulid 17855 cofurid 17856 funcres 17861 funcres2 17863 wunfunc 17866 funcres2c 17868 fullpropd 17887 fthsect 17892 fthinv 17893 fthmon 17894 ffthiso 17896 cofull 17901 cofth 17902 fuccocl 17932 fucidcl 17933 fuclid 17934 fucrid 17935 fucass 17936 fucsect 17940 fucinv 17941 invfuc 17942 fuciso 17943 natpropd 17944 fucpropd 17945 catciso 18076 prfval 18163 prfcl 18167 prf1st 18168 prf2nd 18169 1st2ndprf 18170 evlfcllem 18185 evlfcl 18186 curf1cl 18192 curfcl 18196 uncf1 18200 uncf2 18201 curfuncf 18202 uncfcurf 18203 diag1cl 18206 curf2ndf 18211 yon1cl 18227 oyon1cl 18235 yonedalem3a 18238 yonedalem4c 18241 yonedalem3b 18243 yonedalem3 18244 yonedainv 18245 yonffthlem 18246 yoniso 18249 func0g 49586 funchomf 49594 cofidf2a 49614 cofidf1a 49615 cofidf1 49618 imasubc 49648 imassc 49650 imaid 49651 imasubc3 49653 upciclem2 49664 upciclem3 49665 upeu2 49669 uppropd 49678 oppcup 49704 uptrlem1 49707 uptrlem3 49709 uptrar 49713 natoppf 49726 diag1 49801 diag1f1 49804 fuco111x 49828 fuco11idx 49832 fuco22natlem1 49839 fuco22natlem2 49840 fuco22natlem3 49841 fuco22natlem 49842 fucoid 49845 fuco23alem 49848 fucocolem1 49850 fucocolem2 49851 fucocolem3 49852 fucocolem4 49853 fucoco 49854 fucolid 49858 fucorid 49859 fucorid2 49860 precofvallem 49863 precofvalALT 49865 precofval2 49866 prcof22a 49889 prcofdiag1 49890 prcofdiag 49891 fucoppcco 49906 oppfdiag1 49911 oppfdiag 49913 functhincfun 49946 fullthinc 49947 thincciso2 49952 functermc 50005 fulltermc 50008 termcfuncval 50029 funcsn 50038 uobeqterm 50043 concom 50160 coccom 50161 |
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