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Mirrors > Home > MPE Home > Th. List > subcid | Structured version Visualization version GIF version |
Description: The identity in a subcategory is the same as the original category. (Contributed by Mario Carneiro, 4-Jan-2017.) |
Ref | Expression |
---|---|
subccat.1 | ⊢ 𝐷 = (𝐶 ↾cat 𝐽) |
subccat.j | ⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶)) |
subccatid.1 | ⊢ (𝜑 → 𝐽 Fn (𝑆 × 𝑆)) |
subccatid.2 | ⊢ 1 = (Id‘𝐶) |
subcid.x | ⊢ (𝜑 → 𝑋 ∈ 𝑆) |
Ref | Expression |
---|---|
subcid | ⊢ (𝜑 → ( 1 ‘𝑋) = ((Id‘𝐷)‘𝑋)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | subccat.1 | . . . . 5 ⊢ 𝐷 = (𝐶 ↾cat 𝐽) | |
2 | subccat.j | . . . . 5 ⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶)) | |
3 | subccatid.1 | . . . . 5 ⊢ (𝜑 → 𝐽 Fn (𝑆 × 𝑆)) | |
4 | subccatid.2 | . . . . 5 ⊢ 1 = (Id‘𝐶) | |
5 | 1, 2, 3, 4 | subccatid 16712 | . . . 4 ⊢ (𝜑 → (𝐷 ∈ Cat ∧ (Id‘𝐷) = (𝑥 ∈ 𝑆 ↦ ( 1 ‘𝑥)))) |
6 | 5 | simprd 477 | . . 3 ⊢ (𝜑 → (Id‘𝐷) = (𝑥 ∈ 𝑆 ↦ ( 1 ‘𝑥))) |
7 | simpr 471 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 = 𝑋) → 𝑥 = 𝑋) | |
8 | 7 | fveq2d 6336 | . . 3 ⊢ ((𝜑 ∧ 𝑥 = 𝑋) → ( 1 ‘𝑥) = ( 1 ‘𝑋)) |
9 | subcid.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝑆) | |
10 | fvexd 6344 | . . 3 ⊢ (𝜑 → ( 1 ‘𝑋) ∈ V) | |
11 | 6, 8, 9, 10 | fvmptd 6430 | . 2 ⊢ (𝜑 → ((Id‘𝐷)‘𝑋) = ( 1 ‘𝑋)) |
12 | 11 | eqcomd 2776 | 1 ⊢ (𝜑 → ( 1 ‘𝑋) = ((Id‘𝐷)‘𝑋)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 382 = wceq 1630 ∈ wcel 2144 Vcvv 3349 ↦ cmpt 4861 × cxp 5247 Fn wfn 6026 ‘cfv 6031 (class class class)co 6792 Catccat 16531 Idccid 16532 ↾cat cresc 16674 Subcatcsubc 16675 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1869 ax-4 1884 ax-5 1990 ax-6 2056 ax-7 2092 ax-8 2146 ax-9 2153 ax-10 2173 ax-11 2189 ax-12 2202 ax-13 2407 ax-ext 2750 ax-rep 4902 ax-sep 4912 ax-nul 4920 ax-pow 4971 ax-pr 5034 ax-un 7095 ax-cnex 10193 ax-resscn 10194 ax-1cn 10195 ax-icn 10196 ax-addcl 10197 ax-addrcl 10198 ax-mulcl 10199 ax-mulrcl 10200 ax-mulcom 10201 ax-addass 10202 ax-mulass 10203 ax-distr 10204 ax-i2m1 10205 ax-1ne0 10206 ax-1rid 10207 ax-rnegex 10208 ax-rrecex 10209 ax-cnre 10210 ax-pre-lttri 10211 ax-pre-lttrn 10212 ax-pre-ltadd 10213 ax-pre-mulgt0 10214 |
This theorem depends on definitions: df-bi 197 df-an 383 df-or 827 df-3or 1071 df-3an 1072 df-tru 1633 df-fal 1636 df-ex 1852 df-nf 1857 df-sb 2049 df-eu 2621 df-mo 2622 df-clab 2757 df-cleq 2763 df-clel 2766 df-nfc 2901 df-ne 2943 df-nel 3046 df-ral 3065 df-rex 3066 df-reu 3067 df-rmo 3068 df-rab 3069 df-v 3351 df-sbc 3586 df-csb 3681 df-dif 3724 df-un 3726 df-in 3728 df-ss 3735 df-pss 3737 df-nul 4062 df-if 4224 df-pw 4297 df-sn 4315 df-pr 4317 df-tp 4319 df-op 4321 df-uni 4573 df-iun 4654 df-br 4785 df-opab 4845 df-mpt 4862 df-tr 4885 df-id 5157 df-eprel 5162 df-po 5170 df-so 5171 df-fr 5208 df-we 5210 df-xp 5255 df-rel 5256 df-cnv 5257 df-co 5258 df-dm 5259 df-rn 5260 df-res 5261 df-ima 5262 df-pred 5823 df-ord 5869 df-on 5870 df-lim 5871 df-suc 5872 df-iota 5994 df-fun 6033 df-fn 6034 df-f 6035 df-f1 6036 df-fo 6037 df-f1o 6038 df-fv 6039 df-riota 6753 df-ov 6795 df-oprab 6796 df-mpt2 6797 df-om 7212 df-1st 7314 df-2nd 7315 df-wrecs 7558 df-recs 7620 df-rdg 7658 df-er 7895 df-pm 8011 df-ixp 8062 df-en 8109 df-dom 8110 df-sdom 8111 df-pnf 10277 df-mnf 10278 df-xr 10279 df-ltxr 10280 df-le 10281 df-sub 10469 df-neg 10470 df-nn 11222 df-2 11280 df-3 11281 df-4 11282 df-5 11283 df-6 11284 df-7 11285 df-8 11286 df-9 11287 df-n0 11494 df-z 11579 df-dec 11695 df-ndx 16066 df-slot 16067 df-base 16069 df-sets 16070 df-ress 16071 df-hom 16173 df-cco 16174 df-cat 16535 df-cid 16536 df-homf 16537 df-ssc 16676 df-resc 16677 df-subc 16678 |
This theorem is referenced by: subsubc 16719 funcres 16762 funcres2b 16763 rngcid 42497 ringcid 42543 |
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