fuco11id - Mathbox for Zhi Wang

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Theorem fuco11id 49365

Description: The identity morphism of the mapped object. (Contributed by Zhi Wang, 30-Sep-2025.)

**Hypotheses**
Ref	Expression
fuco11.o	⊢ (𝜑 → (⟨𝐶, 𝐷⟩ ∘_F 𝐸) = ⟨𝑂, 𝑃⟩)
fuco11.f	⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺)
fuco11.k	⊢ (𝜑 → 𝐾(𝐷 Func 𝐸)𝐿)
fuco11.u	⊢ (𝜑 → 𝑈 = ⟨⟨𝐾, 𝐿⟩, ⟨𝐹, 𝐺⟩⟩)
fuco11id.q	⊢ 𝑄 = (𝐶 FuncCat 𝐸)
fuco11id.i	⊢ 𝐼 = (Id‘𝑄)
fuco11id.1	⊢ 1 = (Id‘𝐸)

**Assertion**
Ref	Expression
fuco11id	⊢ (𝜑 → (𝐼‘(𝑂‘𝑈)) = ( 1 ∘ (𝐾 ∘ 𝐹)))

**Proof of Theorem fuco11id**
Step	Hyp	Ref	Expression
1		fuco11id.q	. . 3 ⊢ 𝑄 = (𝐶 FuncCat 𝐸)
2		fuco11id.i	. . 3 ⊢ 𝐼 = (Id‘𝑄)
3		fuco11id.1	. . 3 ⊢ 1 = (Id‘𝐸)
4		fuco11.o	. . . 4 ⊢ (𝜑 → (⟨𝐶, 𝐷⟩ ∘_F 𝐸) = ⟨𝑂, 𝑃⟩)
5		fuco11.f	. . . 4 ⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺)
6		fuco11.k	. . . 4 ⊢ (𝜑 → 𝐾(𝐷 Func 𝐸)𝐿)
7		fuco11.u	. . . 4 ⊢ (𝜑 → 𝑈 = ⟨⟨𝐾, 𝐿⟩, ⟨𝐹, 𝐺⟩⟩)
8	4, 5, 6, 7	fuco11cl 49358	. . 3 ⊢ (𝜑 → (𝑂‘𝑈) ∈ (𝐶 Func 𝐸))
9	1, 2, 3, 8	fucid 17878	. 2 ⊢ (𝜑 → (𝐼‘(𝑂‘𝑈)) = ( 1 ∘ (1^st ‘(𝑂‘𝑈))))
10	4, 5, 6, 7	fuco111 49361	. . 3 ⊢ (𝜑 → (1^st ‘(𝑂‘𝑈)) = (𝐾 ∘ 𝐹))
11	10	coeq2d 5802	. 2 ⊢ (𝜑 → ( 1 ∘ (1^st ‘(𝑂‘𝑈))) = ( 1 ∘ (𝐾 ∘ 𝐹)))
12	9, 11	eqtrd 2766	1 ⊢ (𝜑 → (𝐼‘(𝑂‘𝑈)) = ( 1 ∘ (𝐾 ∘ 𝐹)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1541 ⟨cop 4582 class class class wbr 5091 ∘ ccom 5620 ‘cfv 6481 (class class class)co 7346 1^st c1st 7919 Idccid 17568 Func cfunc 17758 FuncCat cfuc 17849 ∘_F cfuco 49347

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5217 ax-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 ax-cnex 11059 ax-resscn 11060 ax-1cn 11061 ax-icn 11062 ax-addcl 11063 ax-addrcl 11064 ax-mulcl 11065 ax-mulrcl 11066 ax-mulcom 11067 ax-addass 11068 ax-mulass 11069 ax-distr 11070 ax-i2m1 11071 ax-1ne0 11072 ax-1rid 11073 ax-rnegex 11074 ax-rrecex 11075 ax-cnre 11076 ax-pre-lttri 11077 ax-pre-lttrn 11078 ax-pre-ltadd 11079 ax-pre-mulgt0 11080

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-tp 4581 df-op 4583 df-uni 4860 df-iun 4943 df-br 5092 df-opab 5154 df-mpt 5173 df-tr 5199 df-id 5511 df-eprel 5516 df-po 5524 df-so 5525 df-fr 5569 df-we 5571 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-er 8622 df-map 8752 df-ixp 8822 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-pnf 11145 df-mnf 11146 df-xr 11147 df-ltxr 11148 df-le 11149 df-sub 11343 df-neg 11344 df-nn 12123 df-2 12185 df-3 12186 df-4 12187 df-5 12188 df-6 12189 df-7 12190 df-8 12191 df-9 12192 df-n0 12379 df-z 12466 df-dec 12586 df-uz 12730 df-fz 13405 df-struct 17055 df-slot 17090 df-ndx 17102 df-base 17118 df-hom 17182 df-cco 17183 df-cat 17571 df-cid 17572 df-func 17762 df-cofu 17764 df-nat 17850 df-fuc 17851 df-fuco 49348

This theorem is referenced by: fuco11idx 49366 fucoid 49379

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