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| Mirrors > Home > MPE Home > Th. List > fuchom | Structured version Visualization version GIF version | ||
| Description: The morphisms in the functor category are natural transformations. (Contributed by Mario Carneiro, 6-Jan-2017.) (Proof shortened by AV, 14-Oct-2024.) |
| Ref | Expression |
|---|---|
| fucbas.q | ⊢ 𝑄 = (𝐶 FuncCat 𝐷) |
| fuchom.n | ⊢ 𝑁 = (𝐶 Nat 𝐷) |
| Ref | Expression |
|---|---|
| fuchom | ⊢ 𝑁 = (Hom ‘𝑄) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fucbas.q | . . . . 5 ⊢ 𝑄 = (𝐶 FuncCat 𝐷) | |
| 2 | eqid 2765 | . . . . 5 ⊢ (𝐶 Func 𝐷) = (𝐶 Func 𝐷) | |
| 3 | fuchom.n | . . . . 5 ⊢ 𝑁 = (𝐶 Nat 𝐷) | |
| 4 | eqid 2765 | . . . . 5 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 5 | eqid 2765 | . . . . 5 ⊢ (comp‘𝐷) = (comp‘𝐷) | |
| 6 | simpl 488 | . . . . 5 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝐶 ∈ Cat) | |
| 7 | simpr 490 | . . . . 5 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝐷 ∈ Cat) | |
| 8 | eqid 2765 | . . . . . 6 ⊢ (comp‘𝑄) = (comp‘𝑄) | |
| 9 | 1, 2, 3, 4, 5, 6, 7, 8 | fuccofval 18043 | . . . . 5 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → (comp‘𝑄) = (𝑣 ∈ ((𝐶 Func 𝐷) × (𝐶 Func 𝐷)), ℎ ∈ (𝐶 Func 𝐷) ↦ ⦋(1st ‘𝑣) / 𝑓⦌⦋(2nd ‘𝑣) / 𝑔⦌(𝑏 ∈ (𝑔𝑁ℎ), 𝑎 ∈ (𝑓𝑁𝑔) ↦ (𝑥 ∈ (Base‘𝐶) ↦ ((𝑏‘𝑥)(〈((1st ‘𝑓)‘𝑥), ((1st ‘𝑔)‘𝑥)〉(comp‘𝐷)((1st ‘ℎ)‘𝑥))(𝑎‘𝑥)))))) |
| 10 | 1, 2, 3, 4, 5, 6, 7, 9 | fucval 18042 | . . . 4 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑄 = {〈(Base‘ndx), (𝐶 Func 𝐷)〉, 〈(Hom ‘ndx), 𝑁〉, 〈(comp‘ndx), (comp‘𝑄)〉}) |
| 11 | catstr 18041 | . . . 4 ⊢ {〈(Base‘ndx), (𝐶 Func 𝐷)〉, 〈(Hom ‘ndx), 𝑁〉, 〈(comp‘ndx), (comp‘𝑄)〉} Struct 〈1, ;15〉 | |
| 12 | homid 17489 | . . . 4 ⊢ Hom = Slot (Hom ‘ndx) | |
| 13 | snsstp2 4785 | . . . 4 ⊢ {〈(Hom ‘ndx), 𝑁〉} ⊆ {〈(Base‘ndx), (𝐶 Func 𝐷)〉, 〈(Hom ‘ndx), 𝑁〉, 〈(comp‘ndx), (comp‘𝑄)〉} | |
| 14 | 3 | ovexi 7453 | . . . . 5 ⊢ 𝑁 ∈ V |
| 15 | 14 | a1i 11 | . . . 4 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑁 ∈ V) |
| 16 | eqid 2765 | . . . 4 ⊢ (Hom ‘𝑄) = (Hom ‘𝑄) | |
| 17 | 10, 11, 12, 13, 15, 16 | strfv3 17288 | . . 3 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → (Hom ‘𝑄) = 𝑁) |
| 18 | 17 | eqcomd 2771 | . 2 ⊢ ((𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑁 = (Hom ‘𝑄)) |
| 19 | 12 | str0 17273 | . . 3 ⊢ ∅ = (Hom ‘∅) |
| 20 | 3 | natffn 18033 | . . . . 5 ⊢ 𝑁 Fn ((𝐶 Func 𝐷) × (𝐶 Func 𝐷)) |
| 21 | funcrcl 17944 | . . . . . . . . . 10 ⊢ (𝑓 ∈ (𝐶 Func 𝐷) → (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat)) | |
| 22 | 21 | con3i 155 | . . . . . . . . 9 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → ¬ 𝑓 ∈ (𝐶 Func 𝐷)) |
| 23 | 22 | eq0rdv 4372 | . . . . . . . 8 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → (𝐶 Func 𝐷) = ∅) |
| 24 | 23 | xpeq2d 5693 | . . . . . . 7 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → ((𝐶 Func 𝐷) × (𝐶 Func 𝐷)) = ((𝐶 Func 𝐷) × ∅)) |
| 25 | xp0 5763 | . . . . . . 7 ⊢ ((𝐶 Func 𝐷) × ∅) = ∅ | |
| 26 | 24, 25 | eqtrdi 2816 | . . . . . 6 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → ((𝐶 Func 𝐷) × (𝐶 Func 𝐷)) = ∅) |
| 27 | 26 | fneq2d 6633 | . . . . 5 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → (𝑁 Fn ((𝐶 Func 𝐷) × (𝐶 Func 𝐷)) ↔ 𝑁 Fn ∅)) |
| 28 | 20, 27 | mpbii 236 | . . . 4 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑁 Fn ∅) |
| 29 | fn0 6670 | . . . 4 ⊢ (𝑁 Fn ∅ ↔ 𝑁 = ∅) | |
| 30 | 28, 29 | sylib 221 | . . 3 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑁 = ∅) |
| 31 | fnfuc 18029 | . . . . . . 7 ⊢ FuncCat Fn (Cat × Cat) | |
| 32 | 31 | fndmi 6643 | . . . . . 6 ⊢ dom FuncCat = (Cat × Cat) |
| 33 | 32 | ndmov 7604 | . . . . 5 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → (𝐶 FuncCat 𝐷) = ∅) |
| 34 | 1, 33 | eqtrid 2812 | . . . 4 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑄 = ∅) |
| 35 | 34 | fveq2d 6889 | . . 3 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → (Hom ‘𝑄) = (Hom ‘∅)) |
| 36 | 19, 30, 35 | 3eqtr4a 2826 | . 2 ⊢ (¬ (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat) → 𝑁 = (Hom ‘𝑄)) |
| 37 | 18, 36 | pm2.61i 184 | 1 ⊢ 𝑁 = (Hom ‘𝑄) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ∧ wa 401 = wceq 1570 ∈ wcel 2146 Vcvv 3457 ∅c0 4286 {ctp 4595 〈cop 4597 × cxp 5661 Fn wfn 6535 ‘cfv 6540 (class class class)co 7419 1c1 11118 5c5 12315 ;cdc 12729 ndxcnx 17277 Basecbs 17293 Hom chom 17345 compcco 17346 Catccat 17744 Func cfunc 17935 Nat cnat 18025 FuncCat cfuc 18026 |
| 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-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11173 ax-resscn 11174 ax-1cn 11175 ax-icn 11176 ax-addcl 11177 ax-addrcl 11178 ax-mulcl 11179 ax-mulrcl 11180 ax-mulcom 11181 ax-addass 11182 ax-mulass 11183 ax-distr 11184 ax-i2m1 11185 ax-1ne0 11186 ax-1rid 11187 ax-rnegex 11188 ax-rrecex 11189 ax-cnre 11190 ax-pre-lttri 11191 ax-pre-lttrn 11192 ax-pre-ltadd 11193 ax-pre-mulgt0 11194 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 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-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-er 8700 df-ixp 8902 df-en 8950 df-dom 8951 df-sdom 8952 df-fin 8953 df-pnf 11262 df-mnf 11263 df-xr 11264 df-ltxr 11265 df-le 11266 df-sub 11460 df-neg 11461 df-nn 12251 df-2 12320 df-3 12321 df-4 12322 df-5 12323 df-6 12324 df-7 12325 df-8 12326 df-9 12327 df-n0 12522 df-z 12609 df-dec 12730 df-uz 12881 df-fz 13554 df-struct 17231 df-slot 17266 df-ndx 17278 df-base 17294 df-hom 17358 df-cco 17359 df-func 17939 df-nat 18027 df-fuc 18028 |
| This theorem is used by: fuccatid 18053 fucsect 18056 fuciso 18059 evlfcllem 18301 evlfcl 18302 curfcl 18312 uncf2 18317 curfuncf 18318 diag2cl 18326 curf2ndf 18327 yonedalem21 18353 yonedalem22 18358 yonedalem3b 18359 yonedalem3 18360 yonffthlem 18362 xpcfuchomfval 50090 xpcfuchom 50091 xpcfuchom2 50092 xpcfucco2 50093 diag2f1 50146 fucoid 50185 fucofunc 50196 postcofval 50201 precofval 50204 precofvalALT 50205 fucoppcco 50246 fucoppc 50247 oppfdiag 50253 diagffth 50375 funcsn 50378 0fucterm 50380 lanrcl5 50472 ranrcl5 50477 lanup 50478 ranup 50479 islmd 50502 iscmd 50503 lmddu 50504 |
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