Theorem oduoppcciso 49561

Description: The dual of a preordered set and the opposite category are category-isomorphic. Example 3.6(1) of [Adamek] p. 25. (Contributed by Zhi Wang, 22-Sep-2025.)

Hypotheses

Ref	Expression
prstcnid.c	⊢ (𝜑 → 𝐶 = (ProsetToCat‘𝐾))
prstcnid.k	⊢ (𝜑 → 𝐾 ∈ Proset )
oduoppcbas.d	⊢ (𝜑 → 𝐷 = (ProsetToCat‘(ODual‘𝐾)))
oduoppcbas.o	⊢ 𝑂 = (oppCat‘𝐶)
oduoppcciso.u	⊢ (𝜑 → 𝑈 ∈ 𝑉)
oduoppcciso.d	⊢ (𝜑 → 𝐷 ∈ 𝑈)
oduoppcciso.o	⊢ (𝜑 → 𝑂 ∈ 𝑈)

Assertion

Ref	Expression
oduoppcciso	⊢ (𝜑 → 𝐷( ≃𝑐 ‘(CatCat‘𝑈))𝑂)

Proof of Theorem oduoppcciso

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

Step	Hyp	Ref	Expression
1		eqid 2729	. 2 ⊢ (CatCat‘𝑈) = (CatCat‘𝑈)
2		eqid 2729	. 2 ⊢ (Base‘𝐷) = (Base‘𝐷)
3		eqid 2729	. 2 ⊢ (Base‘𝑂) = (Base‘𝑂)
4		eqid 2729	. 2 ⊢ (Hom ‘𝐷) = (Hom ‘𝐷)
5		eqid 2729	. 2 ⊢ (Hom ‘𝑂) = (Hom ‘𝑂)
6		oduoppcciso.u	. 2 ⊢ (𝜑 → 𝑈 ∈ 𝑉)
7		oduoppcciso.d	. 2 ⊢ (𝜑 → 𝐷 ∈ 𝑈)
8		oduoppcciso.o	. 2 ⊢ (𝜑 → 𝑂 ∈ 𝑈)
9		oduoppcbas.d	. . 3 ⊢ (𝜑 → 𝐷 = (ProsetToCat‘(ODual‘𝐾)))
10		prstcnid.k	. . . 4 ⊢ (𝜑 → 𝐾 ∈ Proset )
11		eqid 2729	. . . . 5 ⊢ (ODual‘𝐾) = (ODual‘𝐾)
12	11	oduprs 18206	. . . 4 ⊢ (𝐾 ∈ Proset → (ODual‘𝐾) ∈ Proset )
13	10, 12	syl 17	. . 3 ⊢ (𝜑 → (ODual‘𝐾) ∈ Proset )
14	9, 13	prstcthin 49556	. 2 ⊢ (𝜑 → 𝐷 ∈ ThinCat)
15		prstcnid.c	. . . 4 ⊢ (𝜑 → 𝐶 = (ProsetToCat‘𝐾))
16	15, 10	prstcthin 49556	. . 3 ⊢ (𝜑 → 𝐶 ∈ ThinCat)
17		oduoppcbas.o	. . . 4 ⊢ 𝑂 = (oppCat‘𝐶)
18	17	oppcthin 49433	. . 3 ⊢ (𝐶 ∈ ThinCat → 𝑂 ∈ ThinCat)
19	16, 18	syl 17	. 2 ⊢ (𝜑 → 𝑂 ∈ ThinCat)
20		f1oi 6802	. . 3 ⊢ ( I ↾ (Base‘𝐷)):(Base‘𝐷)–1-1-onto→(Base‘𝐷)
21	15, 10, 9, 17	oduoppcbas 49560	. . . 4 ⊢ (𝜑 → (Base‘𝐷) = (Base‘𝑂))
22	21	f1oeq3d 6761	. . 3 ⊢ (𝜑 → (( I ↾ (Base‘𝐷)):(Base‘𝐷)–1-1-onto→(Base‘𝐷) ↔ ( I ↾ (Base‘𝐷)):(Base‘𝐷)–1-1-onto→(Base‘𝑂)))
23	20, 22	mpbii 233	. 2 ⊢ (𝜑 → ( I ↾ (Base‘𝐷)):(Base‘𝐷)–1-1-onto→(Base‘𝑂))
24		eqid 2729	. . . . . . 7 ⊢ (le‘𝐾) = (le‘𝐾)
25		eqid 2729	. . . . . . 7 ⊢ (le‘(ODual‘𝐾)) = (le‘(ODual‘𝐾))
26	11, 24, 25	oduleg 18196	. . . . . 6 ⊢ ((𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷)) → (𝑥(le‘(ODual‘𝐾))𝑦 ↔ 𝑦(le‘𝐾)𝑥))
27	26	adantl 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (𝑥(le‘(ODual‘𝐾))𝑦 ↔ 𝑦(le‘𝐾)𝑥))
28	9	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝐷 = (ProsetToCat‘(ODual‘𝐾)))
29	10	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝐾 ∈ Proset )
30	29, 12	syl 17	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (ODual‘𝐾) ∈ Proset )
31		eqidd 2730	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (le‘(ODual‘𝐾)) = (le‘(ODual‘𝐾)))
32	28, 30, 31	prstcleval 49550	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (le‘(ODual‘𝐾)) = (le‘𝐷))
33		eqidd 2730	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (Hom ‘𝐷) = (Hom ‘𝐷))
34		simprl 770	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝑥 ∈ (Base‘𝐷))
35		simprr 772	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝑦 ∈ (Base‘𝐷))
36	28, 30, 32, 33, 34, 35	prstchom 49557	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (𝑥(le‘(ODual‘𝐾))𝑦 ↔ (𝑥(Hom ‘𝐷)𝑦) ≠ ∅))
37	15	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝐶 = (ProsetToCat‘𝐾))
38		eqidd 2730	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (le‘𝐾) = (le‘𝐾))
39	37, 29, 38	prstcleval 49550	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (le‘𝐾) = (le‘𝐶))
40		eqidd 2730	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (Hom ‘𝐶) = (Hom ‘𝐶))
41		eqid 2729	. . . . . . . . . 10 ⊢ (Base‘𝐶) = (Base‘𝐶)
42	17, 41	oppcbas 17624	. . . . . . . . 9 ⊢ (Base‘𝐶) = (Base‘𝑂)
43	21, 42	eqtr4di 2782	. . . . . . . 8 ⊢ (𝜑 → (Base‘𝐷) = (Base‘𝐶))
44	43	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (Base‘𝐷) = (Base‘𝐶))
45	35, 44	eleqtrd 2830	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝑦 ∈ (Base‘𝐶))
46	34, 44	eleqtrd 2830	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → 𝑥 ∈ (Base‘𝐶))
47	37, 29, 39, 40, 45, 46	prstchom 49557	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (𝑦(le‘𝐾)𝑥 ↔ (𝑦(Hom ‘𝐶)𝑥) ≠ ∅))
48	27, 36, 47	3bitr3d 309	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → ((𝑥(Hom ‘𝐷)𝑦) ≠ ∅ ↔ (𝑦(Hom ‘𝐶)𝑥) ≠ ∅))
49	48	necon4bid 2970	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → ((𝑥(Hom ‘𝐷)𝑦) = ∅ ↔ (𝑦(Hom ‘𝐶)𝑥) = ∅))
50		fvresi 7109	. . . . . . 7 ⊢ (𝑥 ∈ (Base‘𝐷) → (( I ↾ (Base‘𝐷))‘𝑥) = 𝑥)
51	50	ad2antrl 728	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (( I ↾ (Base‘𝐷))‘𝑥) = 𝑥)
52		fvresi 7109	. . . . . . 7 ⊢ (𝑦 ∈ (Base‘𝐷) → (( I ↾ (Base‘𝐷))‘𝑦) = 𝑦)
53	52	ad2antll 729	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (( I ↾ (Base‘𝐷))‘𝑦) = 𝑦)
54	51, 53	oveq12d 7367	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → ((( I ↾ (Base‘𝐷))‘𝑥)(Hom ‘𝑂)(( I ↾ (Base‘𝐷))‘𝑦)) = (𝑥(Hom ‘𝑂)𝑦))
55		eqid 2729	. . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶)
56	55, 17	oppchom 17621	. . . . 5 ⊢ (𝑥(Hom ‘𝑂)𝑦) = (𝑦(Hom ‘𝐶)𝑥)
57	54, 56	eqtrdi 2780	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → ((( I ↾ (Base‘𝐷))‘𝑥)(Hom ‘𝑂)(( I ↾ (Base‘𝐷))‘𝑦)) = (𝑦(Hom ‘𝐶)𝑥))
58	57	eqeq1d 2731	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → (((( I ↾ (Base‘𝐷))‘𝑥)(Hom ‘𝑂)(( I ↾ (Base‘𝐷))‘𝑦)) = ∅ ↔ (𝑦(Hom ‘𝐶)𝑥) = ∅))
59	49, 58	bitr4d 282	. 2 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐷) ∧ 𝑦 ∈ (Base‘𝐷))) → ((𝑥(Hom ‘𝐷)𝑦) = ∅ ↔ ((( I ↾ (Base‘𝐷))‘𝑥)(Hom ‘𝑂)(( I ↾ (Base‘𝐷))‘𝑦)) = ∅))
60	1, 2, 3, 4, 5, 6, 7, 8, 14, 19, 23, 59	thinccisod 49449	1 ⊢ (𝜑 → 𝐷( ≃𝑐 ‘(CatCat‘𝑈))𝑂)

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   = wceq 1540   ∈ wcel 2109   ≠ wne 2925  ∅c0 4284   class class class wbr 5092   I cid 5513   ↾ cres 5621  –1-1-onto→wf1o 6481  ‘cfv 6482  (class class class)co 7349  Basecbs 17120  lecple 17168  Hom chom 17172  oppCatcoppc 17617   ≃_𝑐 ccic 17702  CatCatccatc 18005  ODualcodu 18192   Proset cproset 18198  ThinCatcthinc 49412  ProsetToCatcprstc 49544

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5218  ax-sep 5235  ax-nul 5245  ax-pow 5304  ax-pr 5371  ax-un 7671  ax-cnex 11065  ax-resscn 11066  ax-1cn 11067  ax-icn 11068  ax-addcl 11069  ax-addrcl 11070  ax-mulcl 11071  ax-mulrcl 11072  ax-mulcom 11073  ax-addass 11074  ax-mulass 11075  ax-distr 11076  ax-i2m1 11077  ax-1ne0 11078  ax-1rid 11079  ax-rnegex 11080  ax-rrecex 11081  ax-cnre 11082  ax-pre-lttri 11083  ax-pre-lttrn 11084  ax-pre-ltadd 11085  ax-pre-mulgt0 11086

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-rmo 3343  df-reu 3344  df-rab 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-tp 4582  df-op 4584  df-uni 4859  df-iun 4943  df-br 5093  df-opab 5155  df-mpt 5174  df-tr 5200  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 6249  df-ord 6310  df-on 6311  df-lim 6312  df-suc 6313  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-riota 7306  df-ov 7352  df-oprab 7353  df-mpo 7354  df-om 7800  df-1st 7924  df-2nd 7925  df-supp 8094  df-tpos 8159  df-frecs 8214  df-wrecs 8245  df-recs 8294  df-rdg 8332  df-1o 8388  df-er 8625  df-map 8755  df-ixp 8825  df-en 8873  df-dom 8874  df-sdom 8875  df-fin 8876  df-pnf 11151  df-mnf 11152  df-xr 11153  df-ltxr 11154  df-le 11155  df-sub 11349  df-neg 11350  df-nn 12129  df-2 12191  df-3 12192  df-4 12193  df-5 12194  df-6 12195  df-7 12196  df-8 12197  df-9 12198  df-n0 12385  df-z 12472  df-dec 12592  df-uz 12736  df-fz 13411  df-struct 17058  df-sets 17075  df-slot 17093  df-ndx 17105  df-base 17121  df-ple 17181  df-hom 17185  df-cco 17186  df-cat 17574  df-cid 17575  df-oppc 17618  df-sect 17654  df-inv 17655  df-iso 17656  df-cic 17703  df-func 17765  df-idfu 17766  df-cofu 17767  df-full 17813  df-fth 17814  df-catc 18006  df-odu 18193  df-proset 18200  df-thinc 49413  df-prstc 49545

This theorem is referenced by: (None)