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Theorem inclfusubc 17901

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 17867	. . 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 17897	. . . 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 3920	. 2 ⊢ (𝜑 → (id_func‘𝑆) ∈ (𝑆 Func 𝐶))
8		df-br 5087	. . 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 4825	. . . . 5 ⊢ (𝜑 → ⟨𝐹, 𝐺⟩ = ⟨( I ↾ 𝐵), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑥𝐽𝑦)))⟩)
12		inclfusubc.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝑆)
13	3, 4, 12	idfusubc 17858	. . . . . 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 2775	. . . 4 ⊢ (𝜑 → ⟨𝐹, 𝐺⟩ = (id_func‘𝑆))
16	15	eleq1d 2822	. . 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 1542 ∈ wcel 2114 ⟨cop 4574 class class class wbr 5086 I cid 5518 ↾ cres 5626 ‘cfv 6492 (class class class)co 7360 ∈ cmpo 7362 Basecbs 17170 ↾_cat cresc 17766 Subcatcsubc 17767 Func cfunc 17812 id_funccidfu 17813 Faith cfth 17863

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-map 8768 df-pm 8769 df-ixp 8839 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12166 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 df-n0 12429 df-z 12516 df-dec 12636 df-sets 17125 df-slot 17143 df-ndx 17155 df-base 17171 df-ress 17192 df-hom 17235 df-cco 17236 df-cat 17625 df-cid 17626 df-homf 17627 df-ssc 17768 df-resc 17769 df-subc 17770 df-func 17816 df-idfu 17817 df-full 17864 df-fth 17865

This theorem is referenced by: rngcifuestrc 20607

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