Theorem lanpropd 49870

Description: If the categories have the same set of objects, morphisms, and compositions, then they have the same left Kan extensions. (Contributed by Zhi Wang, 21-Nov-2025.)

Hypotheses

Ref	Expression
lanpropd.1	⊢ (𝜑 → (Homf ‘𝐴) = (Homf ‘𝐵))
lanpropd.2	⊢ (𝜑 → (compf‘𝐴) = (compf‘𝐵))
lanpropd.3	⊢ (𝜑 → (Homf ‘𝐶) = (Homf ‘𝐷))
lanpropd.4	⊢ (𝜑 → (compf‘𝐶) = (compf‘𝐷))
lanpropd.5	⊢ (𝜑 → (Homf ‘𝐸) = (Homf ‘𝐹))
lanpropd.6	⊢ (𝜑 → (compf‘𝐸) = (compf‘𝐹))
lanpropd.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
lanpropd.b	⊢ (𝜑 → 𝐵 ∈ 𝑉)
lanpropd.c	⊢ (𝜑 → 𝐶 ∈ 𝑉)
lanpropd.d	⊢ (𝜑 → 𝐷 ∈ 𝑉)
lanpropd.e	⊢ (𝜑 → 𝐸 ∈ 𝑉)
lanpropd.f	⊢ (𝜑 → 𝐹 ∈ 𝑉)

Assertion

Ref	Expression
lanpropd	⊢ (𝜑 → (⟨𝐴, 𝐶⟩ Lan 𝐸) = (⟨𝐵, 𝐷⟩ Lan 𝐹))

Proof of Theorem lanpropd

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

Step	Hyp	Ref	Expression
1		lanpropd.1	. . . 4 ⊢ (𝜑 → (Homf ‘𝐴) = (Homf ‘𝐵))
2		lanpropd.2	. . . 4 ⊢ (𝜑 → (compf‘𝐴) = (compf‘𝐵))
3		lanpropd.3	. . . 4 ⊢ (𝜑 → (Homf ‘𝐶) = (Homf ‘𝐷))
4		lanpropd.4	. . . 4 ⊢ (𝜑 → (compf‘𝐶) = (compf‘𝐷))
5		lanpropd.a	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
6		lanpropd.b	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑉)
7		lanpropd.c	. . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑉)
8		lanpropd.d	. . . 4 ⊢ (𝜑 → 𝐷 ∈ 𝑉)
9	1, 2, 3, 4, 5, 6, 7, 8	funcpropd 17826	. . 3 ⊢ (𝜑 → (𝐴 Func 𝐶) = (𝐵 Func 𝐷))
10		lanpropd.5	. . . . 5 ⊢ (𝜑 → (Homf ‘𝐸) = (Homf ‘𝐹))
11		lanpropd.6	. . . . 5 ⊢ (𝜑 → (compf‘𝐸) = (compf‘𝐹))
12		lanpropd.e	. . . . 5 ⊢ (𝜑 → 𝐸 ∈ 𝑉)
13		lanpropd.f	. . . . 5 ⊢ (𝜑 → 𝐹 ∈ 𝑉)
14	1, 2, 10, 11, 5, 6, 12, 13	funcpropd 17826	. . . 4 ⊢ (𝜑 → (𝐴 Func 𝐸) = (𝐵 Func 𝐹))
15	14	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝐴 Func 𝐶)) → (𝐴 Func 𝐸) = (𝐵 Func 𝐹))
16	3	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (Homf ‘𝐶) = (Homf ‘𝐷))
17	4	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (compf‘𝐶) = (compf‘𝐷))
18	10	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (Homf ‘𝐸) = (Homf ‘𝐹))
19	11	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (compf‘𝐸) = (compf‘𝐹))
20		funcrcl 17787	. . . . . . . 8 ⊢ (𝑓 ∈ (𝐴 Func 𝐶) → (𝐴 ∈ Cat ∧ 𝐶 ∈ Cat))
21	20	ad2antrl 728	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐴 ∈ Cat ∧ 𝐶 ∈ Cat))
22	21	simprd 495	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐶 ∈ Cat)
23	8	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐷 ∈ 𝑉)
24	16, 17, 22, 23	catpropd 17632	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐶 ∈ Cat ↔ 𝐷 ∈ Cat))
25	22, 24	mpbid 232	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐷 ∈ Cat)
26		funcrcl 17787	. . . . . . . 8 ⊢ (𝑥 ∈ (𝐴 Func 𝐸) → (𝐴 ∈ Cat ∧ 𝐸 ∈ Cat))
27	26	ad2antll 729	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐴 ∈ Cat ∧ 𝐸 ∈ Cat))
28	27	simprd 495	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐸 ∈ Cat)
29	13	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐹 ∈ 𝑉)
30	18, 19, 28, 29	catpropd 17632	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐸 ∈ Cat ↔ 𝐹 ∈ Cat))
31	28, 30	mpbid 232	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐹 ∈ Cat)
32	16, 17, 18, 19, 22, 25, 28, 31	fucpropd 17904	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐶 FuncCat 𝐸) = (𝐷 FuncCat 𝐹))
33	1	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (Homf ‘𝐴) = (Homf ‘𝐵))
34	2	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (compf‘𝐴) = (compf‘𝐵))
35	21	simpld 494	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐴 ∈ Cat)
36	6	adantr 480	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐵 ∈ 𝑉)
37	33, 34, 35, 36	catpropd 17632	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐴 ∈ Cat ↔ 𝐵 ∈ Cat))
38	35, 37	mpbid 232	. . . . . 6 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝐵 ∈ Cat)
39	33, 34, 18, 19, 35, 38, 28, 31	fucpropd 17904	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (𝐴 FuncCat 𝐸) = (𝐵 FuncCat 𝐹))
40	32, 39	oveq12d 7376	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → ((𝐶 FuncCat 𝐸) UP (𝐴 FuncCat 𝐸)) = ((𝐷 FuncCat 𝐹) UP (𝐵 FuncCat 𝐹)))
41		simprl 770	. . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝑓 ∈ (𝐴 Func 𝐶))
42	16, 17, 18, 19, 22, 25, 28, 31, 41	prcofpropd 49634	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → (⟨𝐶, 𝐸⟩ −∘F 𝑓) = (⟨𝐷, 𝐹⟩ −∘F 𝑓))
43		eqidd 2737	. . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → 𝑥 = 𝑥)
44	40, 42, 43	oveq123d 7379	. . 3 ⊢ ((𝜑 ∧ (𝑓 ∈ (𝐴 Func 𝐶) ∧ 𝑥 ∈ (𝐴 Func 𝐸))) → ((⟨𝐶, 𝐸⟩ −∘F 𝑓)((𝐶 FuncCat 𝐸) UP (𝐴 FuncCat 𝐸))𝑥) = ((⟨𝐷, 𝐹⟩ −∘F 𝑓)((𝐷 FuncCat 𝐹) UP (𝐵 FuncCat 𝐹))𝑥))
45	9, 15, 44	mpoeq123dva 7432	. 2 ⊢ (𝜑 → (𝑓 ∈ (𝐴 Func 𝐶), 𝑥 ∈ (𝐴 Func 𝐸) ↦ ((⟨𝐶, 𝐸⟩ −∘F 𝑓)((𝐶 FuncCat 𝐸) UP (𝐴 FuncCat 𝐸))𝑥)) = (𝑓 ∈ (𝐵 Func 𝐷), 𝑥 ∈ (𝐵 Func 𝐹) ↦ ((⟨𝐷, 𝐹⟩ −∘F 𝑓)((𝐷 FuncCat 𝐹) UP (𝐵 FuncCat 𝐹))𝑥)))
46		eqid 2736	. . 3 ⊢ (𝐶 FuncCat 𝐸) = (𝐶 FuncCat 𝐸)
47		eqid 2736	. . 3 ⊢ (𝐴 FuncCat 𝐸) = (𝐴 FuncCat 𝐸)
48	46, 47, 5, 7, 12	lanfval 49868	. 2 ⊢ (𝜑 → (⟨𝐴, 𝐶⟩ Lan 𝐸) = (𝑓 ∈ (𝐴 Func 𝐶), 𝑥 ∈ (𝐴 Func 𝐸) ↦ ((⟨𝐶, 𝐸⟩ −∘F 𝑓)((𝐶 FuncCat 𝐸) UP (𝐴 FuncCat 𝐸))𝑥)))
49		eqid 2736	. . 3 ⊢ (𝐷 FuncCat 𝐹) = (𝐷 FuncCat 𝐹)
50		eqid 2736	. . 3 ⊢ (𝐵 FuncCat 𝐹) = (𝐵 FuncCat 𝐹)
51	49, 50, 6, 8, 13	lanfval 49868	. 2 ⊢ (𝜑 → (⟨𝐵, 𝐷⟩ Lan 𝐹) = (𝑓 ∈ (𝐵 Func 𝐷), 𝑥 ∈ (𝐵 Func 𝐹) ↦ ((⟨𝐷, 𝐹⟩ −∘F 𝑓)((𝐷 FuncCat 𝐹) UP (𝐵 FuncCat 𝐹))𝑥)))
52	45, 48, 51	3eqtr4d 2781	1 ⊢ (𝜑 → (⟨𝐴, 𝐶⟩ Lan 𝐸) = (⟨𝐵, 𝐷⟩ Lan 𝐹))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1541   ∈ wcel 2113  ⟨cop 4586  ‘cfv 6492  (class class class)co 7358   ∈ cmpo 7360  Catccat 17587  Hom_f chomf 17589  comp_fccomf 17590   Func cfunc 17778   FuncCat cfuc 17869   UP cup 49428   −∘_F cprcof 49628   Lan clan 49860

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 2184  ax-ext 2708  ax-rep 5224  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-ral 3052  df-rex 3061  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-tp 4585  df-op 4587  df-uni 4864  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-riota 7315  df-ov 7361  df-oprab 7362  df-mpo 7363  df-1st 7933  df-2nd 7934  df-map 8765  df-ixp 8836  df-cat 17591  df-cid 17592  df-homf 17593  df-comf 17594  df-func 17782  df-nat 17870  df-fuc 17871  df-prcof 49629  df-lan 49862

This theorem is referenced by: (None)