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| Mirrors > Home > MPE Home > Th. List > idfusubc | 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 |
|---|---|
| idfusubc | ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))〉) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | idfusubc.s | . . 3 ⊢ 𝑆 = (𝐶 ↾cat 𝐽) | |
| 2 | idfusubc.i | . . 3 ⊢ 𝐼 = (idfunc‘𝑆) | |
| 3 | idfusubc.b | . . 3 ⊢ 𝐵 = (Base‘𝑆) | |
| 4 | 1, 2, 3 | idfusubc0 18124 | . 2 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦)))〉) |
| 5 | eqid 2763 | . . . . . . . 8 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 6 | subcrcl 18041 | . . . . . . . 8 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐶 ∈ Cat) | |
| 7 | id 23 | . . . . . . . . 9 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐽 ∈ (Subcat‘𝐶)) | |
| 8 | eqidd 2764 | . . . . . . . . 9 ⊢ (𝐽 ∈ (Subcat‘𝐶) → dom dom 𝐽 = dom dom 𝐽) | |
| 9 | 7, 8 | subcfn 18066 | . . . . . . . 8 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐽 Fn (dom dom 𝐽 × dom dom 𝐽)) |
| 10 | 7, 9, 5 | subcss1 18067 | . . . . . . . 8 ⊢ (𝐽 ∈ (Subcat‘𝐶) → dom dom 𝐽 ⊆ (Base‘𝐶)) |
| 11 | 1, 5, 6, 9, 10 | reschom 18055 | . . . . . . 7 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐽 = (Hom ‘𝑆)) |
| 12 | 11 | eqcomd 2769 | . . . . . 6 ⊢ (𝐽 ∈ (Subcat‘𝐶) → (Hom ‘𝑆) = 𝐽) |
| 13 | 12 | oveqd 7468 | . . . . 5 ⊢ (𝐽 ∈ (Subcat‘𝐶) → (𝑥(Hom ‘𝑆)𝑦) = (𝑥𝐽𝑦)) |
| 14 | 13 | reseq2d 5986 | . . . 4 ⊢ (𝐽 ∈ (Subcat‘𝐶) → ( I ↾ (𝑥(Hom ‘𝑆)𝑦)) = ( I ↾ (𝑥𝐽𝑦))) |
| 15 | 14 | mpoeq3dv 7530 | . . 3 ⊢ (𝐽 ∈ (Subcat‘𝐶) → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦))) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))) |
| 16 | 15 | opeq2d 4852 | . 2 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥(Hom ‘𝑆)𝑦)))〉 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))〉) |
| 17 | 4, 16 | eqtrd 2798 | 1 ⊢ (𝐽 ∈ (Subcat‘𝐶) → 𝐼 = 〈( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))〉) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 〈cop 4840 I cid 5552 dom cdm 5658 ↾ cres 5660 ‘cfv 6566 (class class class)co 7451 ∈ cmpo 7453 Basecbs 17431 Hom chom 17483 Catccat 17888 ↾cat cresc 18033 Subcatcsubc 18034 idfunccidfu 18080 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-er 8755 df-pm 8888 df-ixp 8964 df-en 9012 df-dom 9013 df-sdom 9014 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-nn 12376 df-2 12445 df-3 12446 df-4 12447 df-5 12448 df-6 12449 df-7 12450 df-8 12451 df-9 12452 df-n0 12647 df-z 12734 df-dec 12855 df-sets 17386 df-slot 17404 df-ndx 17416 df-base 17432 df-ress 17453 df-hom 17497 df-cco 17498 df-cat 17892 df-cid 17893 df-homf 17894 df-ssc 18035 df-resc 18036 df-subc 18037 df-idfu 18084 |
| This theorem is used by: inclfusubc 18168 |
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