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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 17849 | . . . . . . 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 17961 | . . . 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 2780 | . 2 ⊢ (𝜑 → 𝐼 = (𝑓 ∈ (𝐶 Func 𝐷) ↦ ( 1 ∘ (1st ‘𝑓)))) |
12 | simpr 484 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → 𝑓 = 𝐹) | |
13 | 12 | fveq2d 6901 | . . 3 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → (1st ‘𝑓) = (1st ‘𝐹)) |
14 | 13 | coeq2d 5865 | . 2 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → ( 1 ∘ (1st ‘𝑓)) = ( 1 ∘ (1st ‘𝐹))) |
15 | 8 | fvexi 6911 | . . . 4 ⊢ 1 ∈ V |
16 | fvex 6910 | . . . 4 ⊢ (1st ‘𝐹) ∈ V | |
17 | 15, 16 | coex 7938 | . . 3 ⊢ ( 1 ∘ (1st ‘𝐹)) ∈ V |
18 | 17 | a1i 11 | . 2 ⊢ (𝜑 → ( 1 ∘ (1st ‘𝐹)) ∈ V) |
19 | 11, 14, 3, 18 | fvmptd 7012 | 1 ⊢ (𝜑 → (𝐼‘𝐹) = ( 1 ∘ (1st ‘𝐹))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1534 ∈ wcel 2099 Vcvv 3471 ↦ cmpt 5231 ∘ ccom 5682 ‘cfv 6548 (class class class)co 7420 1st c1st 7991 Catccat 17644 Idccid 17645 Func cfunc 17840 FuncCat cfuc 17932 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-cnex 11195 ax-resscn 11196 ax-1cn 11197 ax-icn 11198 ax-addcl 11199 ax-addrcl 11200 ax-mulcl 11201 ax-mulrcl 11202 ax-mulcom 11203 ax-addass 11204 ax-mulass 11205 ax-distr 11206 ax-i2m1 11207 ax-1ne0 11208 ax-1rid 11209 ax-rnegex 11210 ax-rrecex 11211 ax-cnre 11212 ax-pre-lttri 11213 ax-pre-lttrn 11214 ax-pre-ltadd 11215 ax-pre-mulgt0 11216 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3373 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4909 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-riota 7376 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7871 df-1st 7993 df-2nd 7994 df-frecs 8287 df-wrecs 8318 df-recs 8392 df-rdg 8431 df-1o 8487 df-er 8725 df-map 8847 df-ixp 8917 df-en 8965 df-dom 8966 df-sdom 8967 df-fin 8968 df-pnf 11281 df-mnf 11282 df-xr 11283 df-ltxr 11284 df-le 11285 df-sub 11477 df-neg 11478 df-nn 12244 df-2 12306 df-3 12307 df-4 12308 df-5 12309 df-6 12310 df-7 12311 df-8 12312 df-9 12313 df-n0 12504 df-z 12590 df-dec 12709 df-uz 12854 df-fz 13518 df-struct 17116 df-slot 17151 df-ndx 17163 df-base 17181 df-hom 17257 df-cco 17258 df-cat 17648 df-cid 17649 df-func 17844 df-nat 17933 df-fuc 17934 |
This theorem is referenced by: fucsect 17964 evlfcl 18214 curfcl 18224 curfuncf 18230 curf2ndf 18239 |
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