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Theorem inclfusubc 17988

Description: The "inclusion functor" from a subcategory of a category into the category itself. (Contributed by AV, 30-Mar-2020.)

**Hypotheses**
Ref	Expression
inclfusubc.j	⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶))
inclfusubc.s	⊢ 𝑆 = (𝐶 ↾_cat 𝐽)
inclfusubc.b	⊢ 𝐵 = (Base‘𝑆)
inclfusubc.f	⊢ (𝜑 → 𝐹 = ( I ↾ 𝐵))
inclfusubc.g	⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦))))

**Assertion**
Ref	Expression
inclfusubc	⊢ (𝜑 → 𝐹(𝑆 Func 𝐶)𝐺)

Distinct variable groups: 𝑥,𝐵,𝑦 𝑥,𝐶,𝑦 𝑥,𝐽,𝑦 𝑥,𝑆,𝑦 Allowed substitution hints: 𝜑(𝑥,𝑦) 𝐹(𝑥,𝑦) 𝐺(𝑥,𝑦)

**Proof of Theorem inclfusubc**
Step	Hyp	Ref	Expression
1		fthfunc 17954	. . 3 ⊢ (𝑆 Faith 𝐶) ⊆ (𝑆 Func 𝐶)
2		inclfusubc.j	. . . 4 ⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶))
3		inclfusubc.s	. . . . 5 ⊢ 𝑆 = (𝐶 ↾_cat 𝐽)
4		eqid 2737	. . . . 5 ⊢ (id_func‘𝑆) = (id_func‘𝑆)
5	3, 4	rescfth 17984	. . . 4 ⊢ (𝐽 ∈ (Subcat‘𝐶) → (id_func‘𝑆) ∈ (𝑆 Faith 𝐶))
6	2, 5	syl 17	. . 3 ⊢ (𝜑 → (id_func‘𝑆) ∈ (𝑆 Faith 𝐶))
7	1, 6	sselid 3981	. 2 ⊢ (𝜑 → (id_func‘𝑆) ∈ (𝑆 Func 𝐶))
8		df-br 5144	. . 3 ⊢ (𝐹(𝑆 Func 𝐶)𝐺 ↔ ⟨𝐹, 𝐺⟩ ∈ (𝑆 Func 𝐶))
9		inclfusubc.f	. . . . . 6 ⊢ (𝜑 → 𝐹 = ( I ↾ 𝐵))
10		inclfusubc.g	. . . . . 6 ⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦))))
11	9, 10	opeq12d 4881	. . . . 5 ⊢ (𝜑 → ⟨𝐹, 𝐺⟩ = ⟨( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))⟩)
12		inclfusubc.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝑆)
13	3, 4, 12	idfusubc 17945	. . . . . 6 ⊢ (𝐽 ∈ (Subcat‘𝐶) → (id_func‘𝑆) = ⟨( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))⟩)
14	2, 13	syl 17	. . . . 5 ⊢ (𝜑 → (id_func‘𝑆) = ⟨( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))⟩)
15	11, 14	eqtr4d 2780	. . . 4 ⊢ (𝜑 → ⟨𝐹, 𝐺⟩ = (id_func‘𝑆))
16	15	eleq1d 2826	. . 3 ⊢ (𝜑 → (⟨𝐹, 𝐺⟩ ∈ (𝑆 Func 𝐶) ↔ (id_func‘𝑆) ∈ (𝑆 Func 𝐶)))
17	8, 16	bitrid 283	. 2 ⊢ (𝜑 → (𝐹(𝑆 Func 𝐶)𝐺 ↔ (id_func‘𝑆) ∈ (𝑆 Func 𝐶)))
18	7, 17	mpbird 257	1 ⊢ (𝜑 → 𝐹(𝑆 Func 𝐶)𝐺)

Colors of variables: wff setvar class

Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2108 ⟨cop 4632 class class class wbr 5143 I cid 5577 ↾ cres 5687 ‘cfv 6561 (class class class)co 7431 ∈ cmpo 7433 Basecbs 17247 ↾_cat cresc 17852 Subcatcsubc 17853 Func cfunc 17899 id_funccidfu 17900 Faith cfth 17950

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 ax-1cn 11213 ax-icn 11214 ax-addcl 11215 ax-addrcl 11216 ax-mulcl 11217 ax-mulrcl 11218 ax-mulcom 11219 ax-addass 11220 ax-mulass 11221 ax-distr 11222 ax-i2m1 11223 ax-1ne0 11224 ax-1rid 11225 ax-rnegex 11226 ax-rrecex 11227 ax-cnre 11228 ax-pre-lttri 11229 ax-pre-lttrn 11230 ax-pre-ltadd 11231 ax-pre-mulgt0 11232

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3380 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-op 4633 df-uni 4908 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7388 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-1st 8014 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-er 8745 df-map 8868 df-pm 8869 df-ixp 8938 df-en 8986 df-dom 8987 df-sdom 8988 df-pnf 11297 df-mnf 11298 df-xr 11299 df-ltxr 11300 df-le 11301 df-sub 11494 df-neg 11495 df-nn 12267 df-2 12329 df-3 12330 df-4 12331 df-5 12332 df-6 12333 df-7 12334 df-8 12335 df-9 12336 df-n0 12527 df-z 12614 df-dec 12734 df-sets 17201 df-slot 17219 df-ndx 17231 df-base 17248 df-ress 17275 df-hom 17321 df-cco 17322 df-cat 17711 df-cid 17712 df-homf 17713 df-ssc 17854 df-resc 17855 df-subc 17856 df-func 17903 df-idfu 17904 df-full 17951 df-fth 17952

This theorem is referenced by: rngcifuestrc 20639

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