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Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > 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 17110 | . . 3 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝑆 ∈ Cat) |
6 | eqid 2798 | . . 3 ⊢ (Hom ‘𝑆) = (Hom ‘𝑆) | |
7 | 1, 2, 5, 6 | idfuval 17138 | . 2 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑧 ∈ (𝐵 × 𝐵) ↦ ( I ↾ ((Hom ‘𝑆)‘𝑧)))〉) |
8 | fveq2 6645 | . . . . . . 7 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ((Hom ‘𝑆)‘𝑧) = ((Hom ‘𝑆)‘〈𝑥, 𝑦〉)) | |
9 | df-ov 7138 | . . . . . . 7 ⊢ (𝑥(Hom ‘𝑆)𝑦) = ((Hom ‘𝑆)‘〈𝑥, 𝑦〉) | |
10 | 8, 9 | eqtr4di 2851 | . . . . . 6 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ((Hom ‘𝑆)‘𝑧) = (𝑥(Hom ‘𝑆)𝑦)) |
11 | 10 | reseq2d 5818 | . . . . 5 ⊢ (𝑧 = 〈𝑥, 𝑦〉 → ( I ↾ ((Hom ‘𝑆)‘𝑧)) = ( I ↾ (𝑥(Hom ‘𝑆)𝑦))) |
12 | 11 | mpompt 7245 | . . . 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 4772 | . 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 2833 | 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 1538 ∈ wcel 2111 〈cop 4531 ↦ cmpt 5110 I cid 5424 × cxp 5517 ↾ cres 5521 ‘cfv 6324 (class class class)co 7135 ∈ cmpo 7137 Basecbs 16475 Hom chom 16568 ↾cat cresc 17070 Subcatcsubc 17071 idfunccidfu 17117 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5231 ax-pr 5295 ax-un 7441 ax-cnex 10582 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-nel 3092 df-ral 3111 df-rex 3112 df-reu 3113 df-rmo 3114 df-rab 3115 df-v 3443 df-sbc 3721 df-csb 3829 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-iun 4883 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5425 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-xp 5525 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-res 5531 df-ima 5532 df-pred 6116 df-ord 6162 df-on 6163 df-lim 6164 df-suc 6165 df-iota 6283 df-fun 6326 df-fn 6327 df-f 6328 df-f1 6329 df-fo 6330 df-f1o 6331 df-fv 6332 df-riota 7093 df-ov 7138 df-oprab 7139 df-mpo 7140 df-om 7561 df-1st 7671 df-2nd 7672 df-wrecs 7930 df-recs 7991 df-rdg 8029 df-er 8272 df-pm 8392 df-ixp 8445 df-en 8493 df-dom 8494 df-sdom 8495 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-nn 11626 df-2 11688 df-3 11689 df-4 11690 df-5 11691 df-6 11692 df-7 11693 df-8 11694 df-9 11695 df-n0 11886 df-z 11970 df-dec 12087 df-ndx 16478 df-slot 16479 df-base 16481 df-sets 16482 df-ress 16483 df-hom 16581 df-cco 16582 df-cat 16931 df-cid 16932 df-homf 16933 df-ssc 17072 df-resc 17073 df-subc 17074 df-idfu 17121 |
This theorem is referenced by: idfusubc 44490 |
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