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Mirrors > Home > MPE Home > Th. List > fucid | Structured version Visualization version GIF version |
Description: The identity morphism in the functor category. (Contributed by Mario Carneiro, 6-Jan-2017.) |
Ref | Expression |
---|---|
fucid.q | ⊢ 𝑄 = (𝐶 FuncCat 𝐷) |
fucid.i | ⊢ 𝐼 = (Id‘𝑄) |
fucid.1 | ⊢ 1 = (Id‘𝐷) |
fucid.f | ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷)) |
Ref | Expression |
---|---|
fucid | ⊢ (𝜑 → (𝐼‘𝐹) = ( 1 ∘ (1st ‘𝐹))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fucid.i | . . 3 ⊢ 𝐼 = (Id‘𝑄) | |
2 | fucid.q | . . . . 5 ⊢ 𝑄 = (𝐶 FuncCat 𝐷) | |
3 | fucid.f | . . . . . . 7 ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷)) | |
4 | funcrcl 17494 | . . . . . . 7 ⊢ (𝐹 ∈ (𝐶 Func 𝐷) → (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat)) | |
5 | 3, 4 | syl 17 | . . . . . 6 ⊢ (𝜑 → (𝐶 ∈ Cat ∧ 𝐷 ∈ Cat)) |
6 | 5 | simpld 494 | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ Cat) |
7 | 5 | simprd 495 | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ Cat) |
8 | fucid.1 | . . . . 5 ⊢ 1 = (Id‘𝐷) | |
9 | 2, 6, 7, 8 | fuccatid 17603 | . . . 4 ⊢ (𝜑 → (𝑄 ∈ Cat ∧ (Id‘𝑄) = (𝑓 ∈ (𝐶 Func 𝐷) ↦ ( 1 ∘ (1st ‘𝑓))))) |
10 | 9 | simprd 495 | . . 3 ⊢ (𝜑 → (Id‘𝑄) = (𝑓 ∈ (𝐶 Func 𝐷) ↦ ( 1 ∘ (1st ‘𝑓)))) |
11 | 1, 10 | eqtrid 2790 | . 2 ⊢ (𝜑 → 𝐼 = (𝑓 ∈ (𝐶 Func 𝐷) ↦ ( 1 ∘ (1st ‘𝑓)))) |
12 | simpr 484 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → 𝑓 = 𝐹) | |
13 | 12 | fveq2d 6760 | . . 3 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → (1st ‘𝑓) = (1st ‘𝐹)) |
14 | 13 | coeq2d 5760 | . 2 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → ( 1 ∘ (1st ‘𝑓)) = ( 1 ∘ (1st ‘𝐹))) |
15 | 8 | fvexi 6770 | . . . 4 ⊢ 1 ∈ V |
16 | fvex 6769 | . . . 4 ⊢ (1st ‘𝐹) ∈ V | |
17 | 15, 16 | coex 7751 | . . 3 ⊢ ( 1 ∘ (1st ‘𝐹)) ∈ V |
18 | 17 | a1i 11 | . 2 ⊢ (𝜑 → ( 1 ∘ (1st ‘𝐹)) ∈ V) |
19 | 11, 14, 3, 18 | fvmptd 6864 | 1 ⊢ (𝜑 → (𝐼‘𝐹) = ( 1 ∘ (1st ‘𝐹))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 ∈ wcel 2108 Vcvv 3422 ↦ cmpt 5153 ∘ ccom 5584 ‘cfv 6418 (class class class)co 7255 1st c1st 7802 Catccat 17290 Idccid 17291 Func cfunc 17485 FuncCat cfuc 17574 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 df-ixp 8644 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-nn 11904 df-2 11966 df-3 11967 df-4 11968 df-5 11969 df-6 11970 df-7 11971 df-8 11972 df-9 11973 df-n0 12164 df-z 12250 df-dec 12367 df-uz 12512 df-fz 13169 df-struct 16776 df-slot 16811 df-ndx 16823 df-base 16841 df-hom 16912 df-cco 16913 df-cat 17294 df-cid 17295 df-func 17489 df-nat 17575 df-fuc 17576 |
This theorem is referenced by: fucsect 17606 evlfcl 17856 curfcl 17866 curfuncf 17872 curf2ndf 17881 |
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