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| Mirrors > Home > MPE Home > Th. List > idfusubc0 | Structured version Visualization version GIF version | ||
| Description: The identity functor for a subcategory is an "inclusion functor" from the subcategory into its supercategory. (Contributed by AV, 29-Mar-2020.) |
| Ref | Expression |
|---|---|
| idfusubc.s | ⊢ 𝑆 = (𝐶 ↾cat 𝐽) |
| idfusubc.i | ⊢ 𝐼 = (idfunc‘𝑆) |
| idfusubc.b | ⊢ 𝐵 = (Base‘𝑆) |
| Ref | Expression |
|---|---|
| idfusubc0 | ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦)))〉) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | idfusubc.i | . . 3 ⊢ 𝐼 = (idfunc‘𝑆) | |
| 2 | idfusubc.b | . . 3 ⊢ 𝐵 = (Base‘𝑆) | |
| 3 | idfusubc.s | . . . 4 ⊢ 𝑆 = (𝐶 ↾cat 𝐽) | |
| 4 | id 22 | . . . 4 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐽 ∈ (Subcat‘𝐶)) | |
| 5 | 3, 4 | subccat 17816 | . . 3 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝑆 ∈ Cat) |
| 6 | eqid 2730 | . . 3 ⊢ (Hom ‘𝑆) = (Hom ‘𝑆) | |
| 7 | 1, 2, 5, 6 | idfuval 17844 | . 2 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑧 ∈ (𝐵 × 𝐵) ↦ ( I ↾ ((Hom ‘𝑆)‘𝑧)))〉) |
| 8 | fveq2 6865 | . . . . . . 7 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ((Hom ‘𝑆)‘𝑧) = ((Hom ‘𝑆)‘〈𝑥, 𝑦〉)) | |
| 9 | df-ov 7397 | . . . . . . 7 ⊢ (𝑥(Hom ‘𝑆)𝑦) = ((Hom ‘𝑆)‘〈𝑥, 𝑦〉) | |
| 10 | 8, 9 | eqtr4di 2783 | . . . . . 6 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ((Hom ‘𝑆)‘𝑧) = (𝑥(Hom ‘𝑆)𝑦)) |
| 11 | 10 | reseq2d 5958 | . . . . 5 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ( I ↾ ((Hom ‘𝑆)‘𝑧)) = ( I ↾ (𝑥(Hom ‘𝑆)𝑦))) |
| 12 | 11 | mpompt 7510 | . . . 4 ⊢ (𝑧 ∈ (𝐵 × 𝐵) ↦ ( I ↾ ((Hom ‘𝑆)‘𝑧))) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦))) |
| 13 | 12 | a1i 11 | . . 3 ⊢ (𝐽 ∈ (Subcat‘𝐶) → (𝑧 ∈ (𝐵 × 𝐵) ↦ ( I ↾ ((Hom ‘𝑆)‘𝑧))) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦)))) |
| 14 | 13 | opeq2d 4852 | . 2 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 〈( I ↾ 𝐵), (𝑧 ∈ (𝐵 × 𝐵) ↦ ( I ↾ ((Hom ‘𝑆)‘𝑧)))〉 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦)))〉) |
| 15 | 7, 14 | eqtrd 2765 | 1 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦)))〉) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 〈cop 4603 ↦ cmpt 5196 I cid 5540 × cxp 5644 ↾ cres 5648 ‘cfv 6519 (class class class)co 7394 ∈ cmpo 7396 Basecbs 17185 Hom chom 17237 ↾cat cresc 17776 Subcatcsubc 17777 idfunccidfu 17823 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5242 ax-sep 5259 ax-nul 5269 ax-pow 5328 ax-pr 5395 ax-un 7718 ax-cnex 11142 ax-resscn 11143 ax-1cn 11144 ax-icn 11145 ax-addcl 11146 ax-addrcl 11147 ax-mulcl 11148 ax-mulrcl 11149 ax-mulcom 11150 ax-addass 11151 ax-mulass 11152 ax-distr 11153 ax-i2m1 11154 ax-1ne0 11155 ax-1rid 11156 ax-rnegex 11157 ax-rrecex 11158 ax-cnre 11159 ax-pre-lttri 11160 ax-pre-lttrn 11161 ax-pre-ltadd 11162 ax-pre-mulgt0 11163 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2880 df-ne 2928 df-nel 3032 df-ral 3047 df-rex 3056 df-rmo 3357 df-reu 3358 df-rab 3412 df-v 3457 df-sbc 3762 df-csb 3871 df-dif 3925 df-un 3927 df-in 3929 df-ss 3939 df-pss 3942 df-nul 4305 df-if 4497 df-pw 4573 df-sn 4598 df-pr 4600 df-op 4604 df-uni 4880 df-iun 4965 df-br 5116 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5541 df-eprel 5546 df-po 5554 df-so 5555 df-fr 5599 df-we 5601 df-xp 5652 df-rel 5653 df-cnv 5654 df-co 5655 df-dm 5656 df-rn 5657 df-res 5658 df-ima 5659 df-pred 6282 df-ord 6343 df-on 6344 df-lim 6345 df-suc 6346 df-iota 6472 df-fun 6521 df-fn 6522 df-f 6523 df-f1 6524 df-fo 6525 df-f1o 6526 df-fv 6527 df-riota 7351 df-ov 7397 df-oprab 7398 df-mpo 7399 df-om 7851 df-1st 7977 df-2nd 7978 df-frecs 8269 df-wrecs 8300 df-recs 8349 df-rdg 8387 df-er 8682 df-pm 8806 df-ixp 8875 df-en 8923 df-dom 8924 df-sdom 8925 df-pnf 11228 df-mnf 11229 df-xr 11230 df-ltxr 11231 df-le 11232 df-sub 11425 df-neg 11426 df-nn 12198 df-2 12260 df-3 12261 df-4 12262 df-5 12263 df-6 12264 df-7 12265 df-8 12266 df-9 12267 df-n0 12459 df-z 12546 df-dec 12666 df-sets 17140 df-slot 17158 df-ndx 17170 df-base 17186 df-ress 17207 df-hom 17250 df-cco 17251 df-cat 17635 df-cid 17636 df-homf 17637 df-ssc 17778 df-resc 17779 df-subc 17780 df-idfu 17827 |
| This theorem is referenced by: idfusubc 17868 |
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