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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 17927 | . . . . . . 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 18039 | . . . 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 2792 | . 2 ⊢ (𝜑 → 𝐼 = (𝑓 ∈ (𝐶 Func 𝐷) ↦ ( 1 ∘ (1st ‘𝑓)))) |
12 | simpr 484 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → 𝑓 = 𝐹) | |
13 | 12 | fveq2d 6924 | . . 3 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → (1st ‘𝑓) = (1st ‘𝐹)) |
14 | 13 | coeq2d 5887 | . 2 ⊢ ((𝜑 ∧ 𝑓 = 𝐹) → ( 1 ∘ (1st ‘𝑓)) = ( 1 ∘ (1st ‘𝐹))) |
15 | 8 | fvexi 6934 | . . . 4 ⊢ 1 ∈ V |
16 | fvex 6933 | . . . 4 ⊢ (1st ‘𝐹) ∈ V | |
17 | 15, 16 | coex 7970 | . . 3 ⊢ ( 1 ∘ (1st ‘𝐹)) ∈ V |
18 | 17 | a1i 11 | . 2 ⊢ (𝜑 → ( 1 ∘ (1st ‘𝐹)) ∈ V) |
19 | 11, 14, 3, 18 | fvmptd 7036 | 1 ⊢ (𝜑 → (𝐼‘𝐹) = ( 1 ∘ (1st ‘𝐹))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1537 ∈ wcel 2108 Vcvv 3488 ↦ cmpt 5249 ∘ ccom 5704 ‘cfv 6573 (class class class)co 7448 1st c1st 8028 Catccat 17722 Idccid 17723 Func cfunc 17918 FuncCat cfuc 18010 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-rep 5303 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-cnex 11240 ax-resscn 11241 ax-1cn 11242 ax-icn 11243 ax-addcl 11244 ax-addrcl 11245 ax-mulcl 11246 ax-mulrcl 11247 ax-mulcom 11248 ax-addass 11249 ax-mulass 11250 ax-distr 11251 ax-i2m1 11252 ax-1ne0 11253 ax-1rid 11254 ax-rnegex 11255 ax-rrecex 11256 ax-cnre 11257 ax-pre-lttri 11258 ax-pre-lttrn 11259 ax-pre-ltadd 11260 ax-pre-mulgt0 11261 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rmo 3388 df-reu 3389 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-pss 3996 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-tp 4653 df-op 4655 df-uni 4932 df-iun 5017 df-br 5167 df-opab 5229 df-mpt 5250 df-tr 5284 df-id 5593 df-eprel 5599 df-po 5607 df-so 5608 df-fr 5652 df-we 5654 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-pred 6332 df-ord 6398 df-on 6399 df-lim 6400 df-suc 6401 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-riota 7404 df-ov 7451 df-oprab 7452 df-mpo 7453 df-om 7904 df-1st 8030 df-2nd 8031 df-frecs 8322 df-wrecs 8353 df-recs 8427 df-rdg 8466 df-1o 8522 df-er 8763 df-map 8886 df-ixp 8956 df-en 9004 df-dom 9005 df-sdom 9006 df-fin 9007 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11522 df-neg 11523 df-nn 12294 df-2 12356 df-3 12357 df-4 12358 df-5 12359 df-6 12360 df-7 12361 df-8 12362 df-9 12363 df-n0 12554 df-z 12640 df-dec 12759 df-uz 12904 df-fz 13568 df-struct 17194 df-slot 17229 df-ndx 17241 df-base 17259 df-hom 17335 df-cco 17336 df-cat 17726 df-cid 17727 df-func 17922 df-nat 18011 df-fuc 18012 |
This theorem is referenced by: fucsect 18042 evlfcl 18292 curfcl 18302 curfuncf 18308 curf2ndf 18317 |
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