Theorem funcres2 17807

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 17771	. . 3 ⊢ Rel (𝐶 Func (𝐷 ↾cat 𝑅))
2	1	a1i 11	. 2 ⊢ (𝑅 ∈ (Subcat‘𝐷) → Rel (𝐶 Func (𝐷 ↾cat 𝑅)))
3		simpr 484	. . . . 5 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔)
4		eqid 2733	. . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝐶)
5		eqid 2733	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
6		simpl 482	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 ∈ (Subcat‘𝐷))
7		eqidd 2734	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = dom dom 𝑅)
8	6, 7	subcfn 17750	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 Fn (dom dom 𝑅 × dom dom 𝑅))
9		eqid 2733	. . . . . . . 8 ⊢ (Base‘(𝐷 ↾cat 𝑅)) = (Base‘(𝐷 ↾cat 𝑅))
10	4, 9, 3	funcf1 17775	. . . . . . 7 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶(Base‘(𝐷 ↾cat 𝑅)))
11		eqid 2733	. . . . . . . . 9 ⊢ (𝐷 ↾cat 𝑅) = (𝐷 ↾cat 𝑅)
12		eqid 2733	. . . . . . . . 9 ⊢ (Base‘𝐷) = (Base‘𝐷)
13		subcrcl 17725	. . . . . . . . . 10 ⊢ (𝑅 ∈ (Subcat‘𝐷) → 𝐷 ∈ Cat)
14	13	adantr 480	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝐷 ∈ Cat)
15	6, 8, 12	subcss1 17751	. . . . . . . . 9 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 ⊆ (Base‘𝐷))
16	11, 12, 14, 8, 15	rescbas 17738	. . . . . . . 8 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → dom dom 𝑅 = (Base‘(𝐷 ↾cat 𝑅)))
17	16	feq3d 6641	. . . . . . 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 257	. . . . . 6 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓:(Base‘𝐶)⟶dom dom 𝑅)
19		eqid 2733	. . . . . . . 8 ⊢ (Hom ‘(𝐷 ↾cat 𝑅)) = (Hom ‘(𝐷 ↾cat 𝑅))
20		simplr 768	. . . . . . . 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 770	. . . . . . . 8 ⊢ (((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑥 ∈ (Base‘𝐶))
22		simprr 772	. . . . . . . 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 17777	. . . . . . 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 17739	. . . . . . . . . 10 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑅 = (Hom ‘(𝐷 ↾cat 𝑅)))
25	24	adantr 480	. . . . . . . . 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 7369	. . . . . . . 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 6641	. . . . . . 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 257	. . . . . 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 17806	. . . . 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 257	. . . 4 ⊢ ((𝑅 ∈ (Subcat‘𝐷) ∧ 𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔) → 𝑓(𝐶 Func 𝐷)𝑔)
31	30	ex 412	. . 3 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 → 𝑓(𝐶 Func 𝐷)𝑔))
32		df-br 5094	. . 3 ⊢ (𝑓(𝐶 Func (𝐷 ↾cat 𝑅))𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)))
33		df-br 5094	. . 3 ⊢ (𝑓(𝐶 Func 𝐷)𝑔 ↔ ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func 𝐷))
34	31, 32, 33	3imtr3g 295	. 2 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (⟨𝑓, 𝑔⟩ ∈ (𝐶 Func (𝐷 ↾cat 𝑅)) → ⟨𝑓, 𝑔⟩ ∈ (𝐶 Func 𝐷)))
35	2, 34	relssdv 5732	1 ⊢ (𝑅 ∈ (Subcat‘𝐷) → (𝐶 Func (𝐷 ↾cat 𝑅)) ⊆ (𝐶 Func 𝐷))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1541   ∈ wcel 2113   ⊆ wss 3898  ⟨cop 4581   class class class wbr 5093  dom cdm 5619  Rel wrel 5624  ⟶wf 6482  ‘cfv 6486  (class class class)co 7352  Basecbs 17122  Hom chom 17174  Catccat 17572   ↾_cat cresc 17717  Subcatcsubc 17718   Func cfunc 17763

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 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2182  ax-ext 2705  ax-rep 5219  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674  ax-cnex 11069  ax-resscn 11070  ax-1cn 11071  ax-icn 11072  ax-addcl 11073  ax-addrcl 11074  ax-mulcl 11075  ax-mulrcl 11076  ax-mulcom 11077  ax-addass 11078  ax-mulass 11079  ax-distr 11080  ax-i2m1 11081  ax-1ne0 11082  ax-1rid 11083  ax-rnegex 11084  ax-rrecex 11085  ax-cnre 11086  ax-pre-lttri 11087  ax-pre-lttrn 11088  ax-pre-ltadd 11089  ax-pre-mulgt0 11090

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-nfc 2882  df-ne 2930  df-nel 3034  df-ral 3049  df-rex 3058  df-rmo 3347  df-reu 3348  df-rab 3397  df-v 3439  df-sbc 3738  df-csb 3847  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-pss 3918  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-iun 4943  df-br 5094  df-opab 5156  df-mpt 5175  df-tr 5201  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6253  df-ord 6314  df-on 6315  df-lim 6316  df-suc 6317  df-iota 6442  df-fun 6488  df-fn 6489  df-f 6490  df-f1 6491  df-fo 6492  df-f1o 6493  df-fv 6494  df-riota 7309  df-ov 7355  df-oprab 7356  df-mpo 7357  df-om 7803  df-1st 7927  df-2nd 7928  df-frecs 8217  df-wrecs 8248  df-recs 8297  df-rdg 8335  df-er 8628  df-map 8758  df-pm 8759  df-ixp 8828  df-en 8876  df-dom 8877  df-sdom 8878  df-pnf 11155  df-mnf 11156  df-xr 11157  df-ltxr 11158  df-le 11159  df-sub 11353  df-neg 11354  df-nn 12133  df-2 12195  df-3 12196  df-4 12197  df-5 12198  df-6 12199  df-7 12200  df-8 12201  df-9 12202  df-n0 12389  df-z 12476  df-dec 12595  df-sets 17077  df-slot 17095  df-ndx 17107  df-base 17123  df-ress 17144  df-hom 17187  df-cco 17188  df-cat 17576  df-cid 17577  df-homf 17578  df-ssc 17719  df-resc 17720  df-subc 17721  df-func 17767

This theorem is referenced by:  fthres2  17843  ressffth  17849  funcsetcres2  18002