Theorem funcres2 17170

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 17134	. . 3 ⊢ Rel (𝐶 Func (𝐷 ↾cat 𝑅))
2	1	a1i 11	. 2 ⊢ (𝑅 ∈ (Subcat‘𝐷) → Rel (𝐶 Func (𝐷 ↾cat 𝑅)))
3		simpr 487	. . . . 5 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔)
4		eqid 2823	. . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝐶)
5		eqid 2823	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
6		simpl 485	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 ∈ (Subcat‘𝐷))
7		eqidd 2824	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = dom dom 𝑅)
8	6, 7	subcfn 17113	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 Fn (dom dom 𝑅 × dom dom 𝑅))
9		eqid 2823	. . . . . . . 8 ⊢ (Base‘(𝐷 ↾cat 𝑅)) = (Base‘(𝐷 ↾cat 𝑅))
10	4, 9, 3	funcf1 17138	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶(Base‘(𝐷 ↾cat 𝑅)))
11		eqid 2823	. . . . . . . . 9 ⊢ (𝐷 ↾cat 𝑅) = (𝐷 ↾cat 𝑅)
12		eqid 2823	. . . . . . . . 9 ⊢ (Base‘𝐷) = (Base‘𝐷)
13		subcrcl 17088	. . . . . . . . . 10 ⊢ (𝑅 ∈ (Subcat‘𝐷) → 𝐷 ∈ Cat)
14	13	adantr 483	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝐷 ∈ Cat)
15	6, 8, 12	subcss1 17114	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 ⊆ (Base‘𝐷))
16	11, 12, 14, 8, 15	rescbas 17101	. . . . . . . 8 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = (Base‘(𝐷 ↾cat 𝑅)))
17	16	feq3d 6503	. . . . . . 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 259	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶dom dom 𝑅)
19		eqid 2823	. . . . . . . 8 ⊢ (Hom ‘(𝐷 ↾cat 𝑅)) = (Hom ‘(𝐷 ↾cat 𝑅))
20		simplr 767	. . . . . . . 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 769	. . . . . . . 8 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑥 ∈ (Base‘𝐶))
22		simprr 771	. . . . . . . 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 17140	. . . . . . 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 17102	. . . . . . . . . 10 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 = (Hom ‘(𝐷 ↾cat 𝑅)))
25	24	adantr 483	. . . . . . . . 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 7175	. . . . . . . 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 6503	. . . . . . 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 259	. . . . . 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 17169	. . . . 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 259	. . . 4 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓(𝐶 Func 𝐷)𝑔)
31	30	ex 415	. . 3 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 → 𝑓(𝐶 Func 𝐷)𝑔))
32		df-br 5069	. . 3 ⊢ (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)))
33		df-br 5069	. . 3 ⊢ (𝑓(𝐶 Func 𝐷)𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func 𝐷))
34	31, 32, 33	3imtr3g 297	. 2 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)) → ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func 𝐷)))
35	2, 34	relssdv 5663	1 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝐶 Func (𝐷 ↾cat 𝑅)) ⊆ (𝐶 Func 𝐷))

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1537   ∈ wcel 2114   ⊆ wss 3938  ⟨cop 4575   class class class wbr 5068  dom cdm 5557  Rel wrel 5562  ⟶wf 6353  ‘cfv 6357  (class class class)co 7158  Basecbs 16485  Hom chom 16578  Catccat 16937   ↾_cat cresc 17080  Subcatcsubc 17081   Func cfunc 17126

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 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-fal 1550  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-om 7583  df-1st 7691  df-2nd 7692  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-er 8291  df-map 8410  df-pm 8411  df-ixp 8464  df-en 8512  df-dom 8513  df-sdom 8514  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-nn 11641  df-2 11703  df-3 11704  df-4 11705  df-5 11706  df-6 11707  df-7 11708  df-8 11709  df-9 11710  df-n0 11901  df-z 11985  df-dec 12102  df-ndx 16488  df-slot 16489  df-base 16491  df-sets 16492  df-ress 16493  df-hom 16591  df-cco 16592  df-cat 16941  df-cid 16942  df-homf 16943  df-ssc 17082  df-resc 17083  df-subc 17084  df-func 17130

This theorem is referenced by:  fthres2  17204  ressffth  17210  funcsetcres2  17355