Theorem funcres2 17146

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 17110	. . 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 2820	. . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝐶)
5		eqid 2820	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
6		simpl 485	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 ∈ (Subcat‘𝐷))
7		eqidd 2821	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = dom dom 𝑅)
8	6, 7	subcfn 17089	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 Fn (dom dom 𝑅 × dom dom 𝑅))
9		eqid 2820	. . . . . . . 8 ⊢ (Base‘(𝐷 ↾cat 𝑅)) = (Base‘(𝐷 ↾cat 𝑅))
10	4, 9, 3	funcf1 17114	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶(Base‘(𝐷 ↾cat 𝑅)))
11		eqid 2820	. . . . . . . . 9 ⊢ (𝐷 ↾cat 𝑅) = (𝐷 ↾cat 𝑅)
12		eqid 2820	. . . . . . . . 9 ⊢ (Base‘𝐷) = (Base‘𝐷)
13		subcrcl 17064	. . . . . . . . . 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 17090	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 ⊆ (Base‘𝐷))
16	11, 12, 14, 8, 15	rescbas 17077	. . . . . . . 8 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = (Base‘(𝐷 ↾cat 𝑅)))
17	16	feq3d 6482	. . . . . . 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 2820	. . . . . . . 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 17116	. . . . . . 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 17078	. . . . . . . . . 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 7154	. . . . . . . 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 6482	. . . . . . 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 17145	. . . . 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 5048	. . 3 ⊢ (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)))
33		df-br 5048	. . 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 5642	1 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝐶 Func (𝐷 ↾cat 𝑅)) ⊆ (𝐶 Func 𝐷))

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1537   ∈ wcel 2114   ⊆ wss 3919  ⟨cop 4554   class class class wbr 5047  dom cdm 5536  Rel wrel 5541  ⟶wf 6332  ‘cfv 6336  (class class class)co 7137  Basecbs 16461  Hom chom 16554  Catccat 16913   ↾_cat cresc 17056  Subcatcsubc 17057   Func cfunc 17102

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 2792  ax-rep 5171  ax-sep 5184  ax-nul 5191  ax-pow 5247  ax-pr 5311  ax-un 7442  ax-cnex 10574  ax-resscn 10575  ax-1cn 10576  ax-icn 10577  ax-addcl 10578  ax-addrcl 10579  ax-mulcl 10580  ax-mulrcl 10581  ax-mulcom 10582  ax-addass 10583  ax-mulass 10584  ax-distr 10585  ax-i2m1 10586  ax-1ne0 10587  ax-1rid 10588  ax-rnegex 10589  ax-rrecex 10590  ax-cnre 10591  ax-pre-lttri 10592  ax-pre-lttrn 10593  ax-pre-ltadd 10594  ax-pre-mulgt0 10595

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 2653  df-clab 2799  df-cleq 2813  df-clel 2891  df-nfc 2959  df-ne 3012  df-nel 3119  df-ral 3138  df-rex 3139  df-reu 3140  df-rmo 3141  df-rab 3142  df-v 3483  df-sbc 3759  df-csb 3867  df-dif 3922  df-un 3924  df-in 3926  df-ss 3935  df-pss 3937  df-nul 4275  df-if 4449  df-pw 4522  df-sn 4549  df-pr 4551  df-tp 4553  df-op 4555  df-uni 4820  df-iun 4902  df-br 5048  df-opab 5110  df-mpt 5128  df-tr 5154  df-id 5441  df-eprel 5446  df-po 5455  df-so 5456  df-fr 5495  df-we 5497  df-xp 5542  df-rel 5543  df-cnv 5544  df-co 5545  df-dm 5546  df-rn 5547  df-res 5548  df-ima 5549  df-pred 6129  df-ord 6175  df-on 6176  df-lim 6177  df-suc 6178  df-iota 6295  df-fun 6338  df-fn 6339  df-f 6340  df-f1 6341  df-fo 6342  df-f1o 6343  df-fv 6344  df-riota 7095  df-ov 7140  df-oprab 7141  df-mpo 7142  df-om 7562  df-1st 7670  df-2nd 7671  df-wrecs 7928  df-recs 7989  df-rdg 8027  df-er 8270  df-map 8389  df-pm 8390  df-ixp 8443  df-en 8491  df-dom 8492  df-sdom 8493  df-pnf 10658  df-mnf 10659  df-xr 10660  df-ltxr 10661  df-le 10662  df-sub 10853  df-neg 10854  df-nn 11620  df-2 11682  df-3 11683  df-4 11684  df-5 11685  df-6 11686  df-7 11687  df-8 11688  df-9 11689  df-n0 11880  df-z 11964  df-dec 12081  df-ndx 16464  df-slot 16465  df-base 16467  df-sets 16468  df-ress 16469  df-hom 16567  df-cco 16568  df-cat 16917  df-cid 16918  df-homf 16919  df-ssc 17058  df-resc 17059  df-subc 17060  df-func 17106

This theorem is referenced by:  fthres2  17180  ressffth  17186  funcsetcres2  17331