Theorem funcres2 16558

Description: A functor into a restricted category is also a functor into the whole category. (Contributed by Mario Carneiro, 6-Jan-2017.)

Assertion

Ref	Expression
funcres2	⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝐶 Func (𝐷 ↾cat 𝑅)) ⊆ (𝐶 Func 𝐷))

Proof of Theorem funcres2

Dummy variables 𝑓 𝑔 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		relfunc 16522	. . 3 ⊢ Rel (𝐶 Func (𝐷 ↾cat 𝑅))
2	1	a1i 11	. 2 ⊢ (𝑅 ∈ (Subcat‘𝐷) → Rel (𝐶 Func (𝐷 ↾cat 𝑅)))
3		simpr 477	. . . . 5 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔)
4		eqid 2622	. . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝐶)
5		eqid 2622	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
6		simpl 473	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 ∈ (Subcat‘𝐷))
7		eqidd 2623	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = dom dom 𝑅)
8	6, 7	subcfn 16501	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 Fn (dom dom 𝑅 × dom dom 𝑅))
9		eqid 2622	. . . . . . . 8 ⊢ (Base‘(𝐷 ↾cat 𝑅)) = (Base‘(𝐷 ↾cat 𝑅))
10	4, 9, 3	funcf1 16526	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶(Base‘(𝐷 ↾cat 𝑅)))
11		eqid 2622	. . . . . . . . 9 ⊢ (𝐷 ↾cat 𝑅) = (𝐷 ↾cat 𝑅)
12		eqid 2622	. . . . . . . . 9 ⊢ (Base‘𝐷) = (Base‘𝐷)
13		subcrcl 16476	. . . . . . . . . 10 ⊢ (𝑅 ∈ (Subcat‘𝐷) → 𝐷 ∈ Cat)
14	13	adantr 481	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝐷 ∈ Cat)
15	6, 8, 12	subcss1 16502	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 ⊆ (Base‘𝐷))
16	11, 12, 14, 8, 15	rescbas 16489	. . . . . . . 8 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = (Base‘(𝐷 ↾cat 𝑅)))
17	16	feq3d 6032	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → (𝑓:(Base‘𝐶)⟶dom dom 𝑅 ↔ 𝑓:(Base‘𝐶)⟶(Base‘(𝐷 ↾cat 𝑅))))
18	10, 17	mpbird 247	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶dom dom 𝑅)
19		eqid 2622	. . . . . . . 8 ⊢ (Hom ‘(𝐷 ↾cat 𝑅)) = (Hom ‘(𝐷 ↾cat 𝑅))
20		simplr 792	. . . . . . . 8 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔)
21		simprl 794	. . . . . . . 8 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑥 ∈ (Base‘𝐶))
22		simprr 796	. . . . . . . 8 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑦 ∈ (Base‘𝐶))
23	4, 5, 19, 20, 21, 22	funcf2 16528	. . . . . . 7 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥𝑔𝑦):(𝑥(Hom ‘𝐶)𝑦)⟶((𝑓‘𝑥)(Hom ‘(𝐷 ↾cat 𝑅))(𝑓‘𝑦)))
24	11, 12, 14, 8, 15	reschom 16490	. . . . . . . . . 10 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 = (Hom ‘(𝐷 ↾cat 𝑅)))
25	24	adantr 481	. . . . . . . . 9 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑅 = (Hom ‘(𝐷 ↾cat 𝑅)))
26	25	oveqd 6667	. . . . . . . 8 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → ((𝑓‘𝑥)𝑅(𝑓‘𝑦)) = ((𝑓‘𝑥)(Hom ‘(𝐷 ↾cat 𝑅))(𝑓‘𝑦)))
27	26	feq3d 6032	. . . . . . 7 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → ((𝑥𝑔𝑦):(𝑥(Hom ‘𝐶)𝑦)⟶((𝑓‘𝑥)𝑅(𝑓‘𝑦)) ↔ (𝑥𝑔𝑦):(𝑥(Hom ‘𝐶)𝑦)⟶((𝑓‘𝑥)(Hom ‘(𝐷 ↾cat 𝑅))(𝑓‘𝑦))))
28	23, 27	mpbird 247	. . . . . 6 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑥𝑔𝑦):(𝑥(Hom ‘𝐶)𝑦)⟶((𝑓‘𝑥)𝑅(𝑓‘𝑦)))
29	4, 5, 6, 8, 18, 28	funcres2b 16557	. . . . 5 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → (𝑓(𝐶 Func 𝐷)𝑔 ↔ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔))
30	3, 29	mpbird 247	. . . 4 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓(𝐶 Func 𝐷)𝑔)
31	30	ex 450	. . 3 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 → 𝑓(𝐶 Func 𝐷)𝑔))
32		df-br 4654	. . 3 ⊢ (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)))
33		df-br 4654	. . 3 ⊢ (𝑓(𝐶 Func 𝐷)𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func 𝐷))
34	31, 32, 33	3imtr3g 284	. 2 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)) → ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func 𝐷)))
35	2, 34	relssdv 5212	1 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝐶 Func (𝐷 ↾cat 𝑅)) ⊆ (𝐶 Func 𝐷))

Syntax hints:   → wi 4   ∧ wa 384   = wceq 1483   ∈ wcel 1990   ⊆ wss 3574  ⟨cop 4183   class class class wbr 4653  dom cdm 5114  Rel wrel 5119  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650  Basecbs 15857  Hom chom 15952  Catccat 16325   ↾_cat cresc 16468  Subcatcsubc 16469   Func cfunc 16514

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-fal 1489  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-er 7742  df-map 7859  df-pm 7860  df-ixp 7909  df-en 7956  df-dom 7957  df-sdom 7958  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-3 11080  df-4 11081  df-5 11082  df-6 11083  df-7 11084  df-8 11085  df-9 11086  df-n0 11293  df-z 11378  df-dec 11494  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-ress 15865  df-hom 15966  df-cco 15967  df-cat 16329  df-cid 16330  df-homf 16331  df-ssc 16470  df-resc 16471  df-subc 16472  df-func 16518

This theorem is referenced by:  fthres2  16592  ressffth  16598  funcsetcres2  16743