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| Mirrors > Home > MPE Home > Th. List > Mathboxes > elcatchom | Structured version Visualization version GIF version | ||
| Description: A morphism of the category of categories (in a universe) is a functor. See df-catc 18144 for the definition of the category Cat, which consists of all categories in the universe 𝑢 (i.e., "𝑢-small categories", see Definition 3.44. of [Adamek] p. 39), with functors as the morphisms (catchom 18148). (Contributed by Zhi Wang, 14-Nov-2025.) |
| Ref | Expression |
|---|---|
| catcrcl.c | ⊢ 𝐶 = (CatCat‘𝑈) |
| catcrcl.h | ⊢ 𝐻 = (Hom ‘𝐶) |
| catcrcl.f | ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) |
| Ref | Expression |
|---|---|
| elcatchom | ⊢ (𝜑 → 𝐹 ∈ (𝑋 Func 𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | catcrcl.f | . 2 ⊢ (𝜑 → 𝐹 ∈ (𝑋𝐻𝑌)) | |
| 2 | catcrcl.c | . . 3 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 3 | eqid 2765 | . . 3 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 4 | catcrcl.h | . . . 4 ⊢ 𝐻 = (Hom ‘𝐶) | |
| 5 | 2, 4, 1 | catcrcl 50025 | . . 3 ⊢ (𝜑 → 𝑈 ∈ V) |
| 6 | 2, 4, 1, 3 | catcrcl2 50026 | . . . 4 ⊢ (𝜑 → (𝑋 ∈ (Base‘𝐶) ∧ 𝑌 ∈ (Base‘𝐶))) |
| 7 | 6 | simpld 499 | . . 3 ⊢ (𝜑 → 𝑋 ∈ (Base‘𝐶)) |
| 8 | 6 | simprd 500 | . . 3 ⊢ (𝜑 → 𝑌 ∈ (Base‘𝐶)) |
| 9 | 2, 3, 5, 4, 7, 8 | catchom 18148 | . 2 ⊢ (𝜑 → (𝑋𝐻𝑌) = (𝑋 Func 𝑌)) |
| 10 | 1, 9 | eleqtrd 2867 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝑋 Func 𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 Vcvv 3457 ‘cfv 6525 (class class class)co 7400 Basecbs 17257 Hom chom 17309 Func cfunc 17899 CatCatccatc 18143 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5231 ax-sep 5250 ax-nul 5260 ax-pow 5326 ax-pr 5394 ax-un 7722 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4868 df-iun 4953 df-br 5105 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6291 df-ord 6352 df-on 6353 df-lim 6354 df-suc 6355 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-1st 7974 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-1o 8441 df-er 8682 df-en 8932 df-dom 8933 df-sdom 8934 df-fin 8935 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-nn 12222 df-2 12291 df-3 12292 df-4 12293 df-5 12294 df-6 12295 df-7 12296 df-8 12297 df-9 12298 df-n0 12493 df-z 12580 df-dec 12700 df-uz 12851 df-fz 13524 df-struct 17195 df-slot 17230 df-ndx 17242 df-base 17258 df-hom 17322 df-cco 17323 df-catc 18144 |
| This theorem is referenced by: catcsect 50028 uobeq2 50031 |
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