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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 2762 | . . . 4 ⊢ (Hom ‘𝐷) = (Hom ‘𝐷) | |
| 5 | eqid 2762 | . . . 4 ⊢ (Hom ‘𝐸) = (Hom ‘𝐸) | |
| 6 | eqid 2762 | . . . 4 ⊢ (Id‘𝐷) = (Id‘𝐷) | |
| 7 | eqid 2762 | . . . 4 ⊢ (Id‘𝐸) = (Id‘𝐸) | |
| 8 | eqid 2762 | . . . 4 ⊢ (comp‘𝐷) = (comp‘𝐷) | |
| 9 | eqid 2762 | . . . 4 ⊢ (comp‘𝐸) = (comp‘𝐸) | |
| 10 | df-br 5108 | . . . . . . 7 ⊢ (𝐹(𝐷 Func 𝐸)𝐺 ↔ 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) | |
| 11 | 1, 10 | sylib 221 | . . . . . 6 ⊢ (𝜑 → 〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸)) |
| 12 | funcrcl 17958 | . . . . . 6 ⊢ (〈𝐹, 𝐺〉 ∈ (𝐷 Func 𝐸) → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) | |
| 13 | 11, 12 | syl 18 | . . . . 5 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ 𝐸 ∈ Cat)) |
| 14 | 13 | simpld 500 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 15 | 13 | simprd 501 | . . . 4 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 16 | 2, 3, 4, 5, 6, 7, 8, 9, 14, 15 | isfunc 17959 | . . 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 235 | . 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 1160 | 1 ⊢ (𝜑 → 𝐹:𝐵⟶𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ∀wral 3078 〈cop 4593 class class class wbr 5107 × cxp 5657 ⟶wf 6533 ‘cfv 6537 (class class class)co 7417 1st c1st 7988 2nd c2nd 7989 ↑m cmap 8830 Xcixp 8908 Basecbs 17307 Hom chom 17359 compcco 17360 Catccat 17758 Idccid 17759 Func cfunc 17949 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-fv 6545 df-ov 7420 df-oprab 7421 df-mpo 7422 df-map 8832 df-ixp 8909 df-func 17953 |
| This theorem is used by: funcsect 17967 funcinv 17968 funciso 17969 funcoppc 17970 cofu1 17979 cofucl 17983 cofuass 17984 cofulid 17985 cofurid 17986 funcres 17991 funcres2 17993 wunfunc 17996 funcres2c 17998 fullpropd 18017 fthsect 18022 fthinv 18023 fthmon 18024 ffthiso 18026 cofull 18031 cofth 18032 fuccocl 18062 fucidcl 18063 fuclid 18064 fucrid 18065 fucass 18066 fucsect 18070 fucinv 18071 invfuc 18072 fuciso 18073 natpropd 18074 fucpropd 18075 catciso 18206 prfval 18293 prfcl 18297 prf1st 18298 prf2nd 18299 1st2ndprf 18300 evlfcllem 18315 evlfcl 18316 curf1cl 18322 curfcl 18326 uncf1 18330 uncf2 18331 curfuncf 18332 uncfcurf 18333 diag1cl 18336 curf2ndf 18341 yon1cl 18357 oyon1cl 18365 yonedalem3a 18368 yonedalem4c 18371 yonedalem3b 18373 yonedalem3 18374 yonedainv 18375 yonffthlem 18376 yoniso 18379 func0g 50023 funchomf 50031 cofidf2a 50051 cofidf1a 50052 cofidf1 50055 imasubc 50085 imassc 50087 imaid 50088 imasubc3 50090 upciclem2 50101 upciclem3 50102 upeu2 50106 uppropd 50115 oppcup 50141 uptrlem1 50144 uptrlem3 50146 uptrar 50150 natoppf 50163 diag1 50238 diag1f1 50241 fuco111x 50265 fuco11idx 50269 fuco22natlem1 50276 fuco22natlem2 50277 fuco22natlem3 50278 fuco22natlem 50279 fucoid 50282 fuco23alem 50285 fucocolem1 50287 fucocolem2 50288 fucocolem3 50289 fucocolem4 50290 fucoco 50291 fucolid 50295 fucorid 50296 fucorid2 50297 precofvallem 50300 precofvalALT 50302 precofval2 50303 prcof22a 50326 prcofdiag1 50327 prcofdiag 50328 fucoppcco 50343 oppfdiag1 50348 oppfdiag 50350 functhincfun 50383 fullthinc 50384 thincciso2 50389 functermc 50442 fulltermc 50445 termcfuncval 50466 funcsn 50475 uobeqterm 50480 concom 50597 coccom 50598 |
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