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| Mirrors > Home > MPE Home > Th. List > yon1cl | Structured version Visualization version GIF version | ||
| Description: The Yoneda embedding at an object of 𝐶 is a presheaf on 𝐶, also known as the contravariant Hom functor. (Contributed by Mario Carneiro, 17-Jan-2017.) |
| Ref | Expression |
|---|---|
| yon11.y | ⊢ 𝑌 = (Yon‘𝐶) |
| yon11.b | ⊢ 𝐵 = (Base‘𝐶) |
| yon11.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| yon11.p | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| yon1cl.o | ⊢ 𝑂 = (oppCat‘𝐶) |
| yon1cl.s | ⊢ 𝑆 = (SetCat‘𝑈) |
| yon1cl.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| yon1cl.h | ⊢ (𝜑 → ran (Homf ‘𝐶) ⊆ 𝑈) |
| Ref | Expression |
|---|---|
| yon1cl | ⊢ (𝜑 → ((1st ‘𝑌)‘𝑋) ∈ (𝑂 Func 𝑆)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | yon11.b | . . 3 ⊢ 𝐵 = (Base‘𝐶) | |
| 2 | eqid 2761 | . . . 4 ⊢ (𝑂 FuncCat 𝑆) = (𝑂 FuncCat 𝑆) | |
| 3 | 2 | fucbas 17987 | . . 3 ⊢ (𝑂 Func 𝑆) = (Base‘(𝑂 FuncCat 𝑆)) |
| 4 | relfunc 17886 | . . . 4 ⊢ Rel (𝐶 Func (𝑂 FuncCat 𝑆)) | |
| 5 | yon11.y | . . . . 5 ⊢ 𝑌 = (Yon‘𝐶) | |
| 6 | yon11.c | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 7 | yon1cl.o | . . . . 5 ⊢ 𝑂 = (oppCat‘𝐶) | |
| 8 | yon1cl.s | . . . . 5 ⊢ 𝑆 = (SetCat‘𝑈) | |
| 9 | yon1cl.u | . . . . 5 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 10 | yon1cl.h | . . . . 5 ⊢ (𝜑 → ran (Homf ‘𝐶) ⊆ 𝑈) | |
| 11 | 5, 6, 7, 8, 2, 9, 10 | yoncl 18285 | . . . 4 ⊢ (𝜑 → 𝑌 ∈ (𝐶 Func (𝑂 FuncCat 𝑆))) |
| 12 | 1st2ndbr 8018 | . . . 4 ⊢ ((Rel (𝐶 Func (𝑂 FuncCat 𝑆)) ∧ 𝑌 ∈ (𝐶 Func (𝑂 FuncCat 𝑆))) → (1st ‘𝑌)(𝐶 Func (𝑂 FuncCat 𝑆))(2nd ‘𝑌)) | |
| 13 | 4, 11, 12 | sylancr 596 | . . 3 ⊢ (𝜑 → (1st ‘𝑌)(𝐶 Func (𝑂 FuncCat 𝑆))(2nd ‘𝑌)) |
| 14 | 1, 3, 13 | funcf1 17890 | . 2 ⊢ (𝜑 → (1st ‘𝑌):𝐵⟶(𝑂 Func 𝑆)) |
| 15 | yon11.p | . 2 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 16 | 14, 15 | ffvelcdmd 7061 | 1 ⊢ (𝜑 → ((1st ‘𝑌)‘𝑋) ∈ (𝑂 Func 𝑆)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1559 ∈ wcel 2141 ⊆ wss 3902 class class class wbr 5097 ran crn 5644 Rel wrel 5648 ‘cfv 6516 (class class class)co 7391 1st c1st 7963 2nd c2nd 7964 Basecbs 17236 Catccat 17687 Homf chomf 17689 oppCatcoppc 17734 Func cfunc 17878 FuncCat cfuc 17969 SetCatcsetc 18099 Yoncyon 18272 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5224 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7713 ax-cnex 11123 ax-resscn 11124 ax-1cn 11125 ax-icn 11126 ax-addcl 11127 ax-addrcl 11128 ax-mulcl 11129 ax-mulrcl 11130 ax-mulcom 11131 ax-addass 11132 ax-mulass 11133 ax-distr 11134 ax-i2m1 11135 ax-1ne0 11136 ax-1rid 11137 ax-rnegex 11138 ax-rrecex 11139 ax-cnre 11140 ax-pre-lttri 11141 ax-pre-lttrn 11142 ax-pre-ltadd 11143 ax-pre-mulgt0 11144 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-tp 4584 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6283 df-ord 6344 df-on 6345 df-lim 6346 df-suc 6347 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-riota 7348 df-ov 7394 df-oprab 7395 df-mpo 7396 df-om 7842 df-1st 7965 df-2nd 7966 df-tpos 8200 df-frecs 8256 df-wrecs 8287 df-recs 8336 df-rdg 8375 df-1o 8431 df-er 8672 df-map 8804 df-ixp 8874 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-pnf 11212 df-mnf 11213 df-xr 11214 df-ltxr 11215 df-le 11216 df-sub 11410 df-neg 11411 df-nn 12205 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12476 df-z 12563 df-dec 12683 df-uz 12834 df-fz 13507 df-struct 17174 df-sets 17191 df-slot 17209 df-ndx 17221 df-base 17237 df-hom 17301 df-cco 17302 df-cat 17691 df-cid 17692 df-homf 17693 df-comf 17694 df-oppc 17735 df-func 17882 df-nat 17970 df-fuc 17971 df-setc 18100 df-xpc 18195 df-curf 18237 df-hof 18273 df-yon 18274 |
| This theorem is referenced by: yonedalem21 18296 yonedalem3a 18297 yonedalem4c 18300 |
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