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Mirrors > Home > MPE Home > Th. List > catcid | Structured version Visualization version GIF version |
Description: The identity arrow in the category of categories is the identity functor. (Contributed by Mario Carneiro, 3-Jan-2017.) |
Ref | Expression |
---|---|
catccatid.c | β’ πΆ = (CatCatβπ) |
catccatid.b | β’ π΅ = (BaseβπΆ) |
catcid.o | β’ 1 = (IdβπΆ) |
catcid.i | β’ πΌ = (idfuncβπ) |
catcid.u | β’ (π β π β π) |
catcid.x | β’ (π β π β π΅) |
Ref | Expression |
---|---|
catcid | β’ (π β ( 1 βπ) = πΌ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | catcid.o | . . . 4 β’ 1 = (IdβπΆ) | |
2 | catcid.u | . . . . . 6 β’ (π β π β π) | |
3 | catccatid.c | . . . . . . 7 β’ πΆ = (CatCatβπ) | |
4 | catccatid.b | . . . . . . 7 β’ π΅ = (BaseβπΆ) | |
5 | 3, 4 | catccatid 18066 | . . . . . 6 β’ (π β π β (πΆ β Cat β§ (IdβπΆ) = (π₯ β π΅ β¦ (idfuncβπ₯)))) |
6 | 2, 5 | syl 17 | . . . . 5 β’ (π β (πΆ β Cat β§ (IdβπΆ) = (π₯ β π΅ β¦ (idfuncβπ₯)))) |
7 | 6 | simprd 495 | . . . 4 β’ (π β (IdβπΆ) = (π₯ β π΅ β¦ (idfuncβπ₯))) |
8 | 1, 7 | eqtrid 2778 | . . 3 β’ (π β 1 = (π₯ β π΅ β¦ (idfuncβπ₯))) |
9 | simpr 484 | . . . 4 β’ ((π β§ π₯ = π) β π₯ = π) | |
10 | 9 | fveq2d 6888 | . . 3 β’ ((π β§ π₯ = π) β (idfuncβπ₯) = (idfuncβπ)) |
11 | catcid.x | . . 3 β’ (π β π β π΅) | |
12 | fvexd 6899 | . . 3 β’ (π β (idfuncβπ) β V) | |
13 | 8, 10, 11, 12 | fvmptd 6998 | . 2 β’ (π β ( 1 βπ) = (idfuncβπ)) |
14 | catcid.i | . 2 β’ πΌ = (idfuncβπ) | |
15 | 13, 14 | eqtr4di 2784 | 1 β’ (π β ( 1 βπ) = πΌ) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β§ wa 395 = wceq 1533 β wcel 2098 Vcvv 3468 β¦ cmpt 5224 βcfv 6536 Basecbs 17151 Catccat 17615 Idccid 17616 idfunccidfu 17812 CatCatccatc 18058 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7721 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6293 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6488 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7360 df-ov 7407 df-oprab 7408 df-mpo 7409 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8264 df-wrecs 8295 df-recs 8369 df-rdg 8408 df-1o 8464 df-er 8702 df-map 8821 df-ixp 8891 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11447 df-neg 11448 df-nn 12214 df-2 12276 df-3 12277 df-4 12278 df-5 12279 df-6 12280 df-7 12281 df-8 12282 df-9 12283 df-n0 12474 df-z 12560 df-dec 12679 df-uz 12824 df-fz 13488 df-struct 17087 df-slot 17122 df-ndx 17134 df-base 17152 df-hom 17228 df-cco 17229 df-cat 17619 df-cid 17620 df-func 17815 df-idfu 17816 df-cofu 17817 df-catc 18059 |
This theorem is referenced by: catcisolem 18070 catciso 18071 |
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