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Definition df-xpc 17425
Description: Define the binary product of categories, which has objects for each pair of objects of the factors, and morphisms for each pair of morphisms of the factors. Composition is componentwise. (Contributed by Mario Carneiro, 10-Jan-2017.)
Assertion
Ref Expression
df-xpc ×c = (𝑟 ∈ V, 𝑠 ∈ V ↦ ((Base‘𝑟) × (Base‘𝑠)) / 𝑏(𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))) / {⟨(Base‘ndx), 𝑏⟩, ⟨(Hom ‘ndx), ⟩, ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩})
Distinct variable group:   𝑓,𝑏,𝑔,,𝑟,𝑠,𝑢,𝑣,𝑥,𝑦

Detailed syntax breakdown of Definition df-xpc
StepHypRef Expression
1 cxpc 17421 . 2 class ×c
2 vr . . 3 setvar 𝑟
3 vs . . 3 setvar 𝑠
4 cvv 3497 . . 3 class V
5 vb . . . 4 setvar 𝑏
62cv 1535 . . . . . 6 class 𝑟
7 cbs 16486 . . . . . 6 class Base
86, 7cfv 6358 . . . . 5 class (Base‘𝑟)
93cv 1535 . . . . . 6 class 𝑠
109, 7cfv 6358 . . . . 5 class (Base‘𝑠)
118, 10cxp 5556 . . . 4 class ((Base‘𝑟) × (Base‘𝑠))
12 vh . . . . 5 setvar
13 vu . . . . . 6 setvar 𝑢
14 vv . . . . . 6 setvar 𝑣
155cv 1535 . . . . . 6 class 𝑏
1613cv 1535 . . . . . . . . 9 class 𝑢
17 c1st 7690 . . . . . . . . 9 class 1st
1816, 17cfv 6358 . . . . . . . 8 class (1st𝑢)
1914cv 1535 . . . . . . . . 9 class 𝑣
2019, 17cfv 6358 . . . . . . . 8 class (1st𝑣)
21 chom 16579 . . . . . . . . 9 class Hom
226, 21cfv 6358 . . . . . . . 8 class (Hom ‘𝑟)
2318, 20, 22co 7159 . . . . . . 7 class ((1st𝑢)(Hom ‘𝑟)(1st𝑣))
24 c2nd 7691 . . . . . . . . 9 class 2nd
2516, 24cfv 6358 . . . . . . . 8 class (2nd𝑢)
2619, 24cfv 6358 . . . . . . . 8 class (2nd𝑣)
279, 21cfv 6358 . . . . . . . 8 class (Hom ‘𝑠)
2825, 26, 27co 7159 . . . . . . 7 class ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))
2923, 28cxp 5556 . . . . . 6 class (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))
3013, 14, 15, 15, 29cmpo 7161 . . . . 5 class (𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))))
31 cnx 16483 . . . . . . . 8 class ndx
3231, 7cfv 6358 . . . . . . 7 class (Base‘ndx)
3332, 15cop 4576 . . . . . 6 class ⟨(Base‘ndx), 𝑏
3431, 21cfv 6358 . . . . . . 7 class (Hom ‘ndx)
3512cv 1535 . . . . . . 7 class
3634, 35cop 4576 . . . . . 6 class ⟨(Hom ‘ndx),
37 cco 16580 . . . . . . . 8 class comp
3831, 37cfv 6358 . . . . . . 7 class (comp‘ndx)
39 vx . . . . . . . 8 setvar 𝑥
40 vy . . . . . . . 8 setvar 𝑦
4115, 15cxp 5556 . . . . . . . 8 class (𝑏 × 𝑏)
42 vg . . . . . . . . 9 setvar 𝑔
43 vf . . . . . . . . 9 setvar 𝑓
4439cv 1535 . . . . . . . . . . 11 class 𝑥
4544, 24cfv 6358 . . . . . . . . . 10 class (2nd𝑥)
4640cv 1535 . . . . . . . . . 10 class 𝑦
4745, 46, 35co 7159 . . . . . . . . 9 class ((2nd𝑥)𝑦)
4844, 35cfv 6358 . . . . . . . . 9 class (𝑥)
4942cv 1535 . . . . . . . . . . . 12 class 𝑔
5049, 17cfv 6358 . . . . . . . . . . 11 class (1st𝑔)
5143cv 1535 . . . . . . . . . . . 12 class 𝑓
5251, 17cfv 6358 . . . . . . . . . . 11 class (1st𝑓)
5344, 17cfv 6358 . . . . . . . . . . . . . 14 class (1st𝑥)
5453, 17cfv 6358 . . . . . . . . . . . . 13 class (1st ‘(1st𝑥))
5545, 17cfv 6358 . . . . . . . . . . . . 13 class (1st ‘(2nd𝑥))
5654, 55cop 4576 . . . . . . . . . . . 12 class ⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩
5746, 17cfv 6358 . . . . . . . . . . . 12 class (1st𝑦)
586, 37cfv 6358 . . . . . . . . . . . 12 class (comp‘𝑟)
5956, 57, 58co 7159 . . . . . . . . . . 11 class (⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))
6050, 52, 59co 7159 . . . . . . . . . 10 class ((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓))
6149, 24cfv 6358 . . . . . . . . . . 11 class (2nd𝑔)
6251, 24cfv 6358 . . . . . . . . . . 11 class (2nd𝑓)
6353, 24cfv 6358 . . . . . . . . . . . . 13 class (2nd ‘(1st𝑥))
6445, 24cfv 6358 . . . . . . . . . . . . 13 class (2nd ‘(2nd𝑥))
6563, 64cop 4576 . . . . . . . . . . . 12 class ⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩
6646, 24cfv 6358 . . . . . . . . . . . 12 class (2nd𝑦)
679, 37cfv 6358 . . . . . . . . . . . 12 class (comp‘𝑠)
6865, 66, 67co 7159 . . . . . . . . . . 11 class (⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))
6961, 62, 68co 7159 . . . . . . . . . 10 class ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))
7060, 69cop 4576 . . . . . . . . 9 class ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩
7142, 43, 47, 48, 70cmpo 7161 . . . . . . . 8 class (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩)
7239, 40, 41, 15, 71cmpo 7161 . . . . . . 7 class (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))
7338, 72cop 4576 . . . . . 6 class ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩
7433, 36, 73ctp 4574 . . . . 5 class {⟨(Base‘ndx), 𝑏⟩, ⟨(Hom ‘ndx), ⟩, ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩}
7512, 30, 74csb 3886 . . . 4 class (𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))) / {⟨(Base‘ndx), 𝑏⟩, ⟨(Hom ‘ndx), ⟩, ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩}
765, 11, 75csb 3886 . . 3 class ((Base‘𝑟) × (Base‘𝑠)) / 𝑏(𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))) / {⟨(Base‘ndx), 𝑏⟩, ⟨(Hom ‘ndx), ⟩, ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩}
772, 3, 4, 4, 76cmpo 7161 . 2 class (𝑟 ∈ V, 𝑠 ∈ V ↦ ((Base‘𝑟) × (Base‘𝑠)) / 𝑏(𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))) / {⟨(Base‘ndx), 𝑏⟩, ⟨(Hom ‘ndx), ⟩, ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩})
781, 77wceq 1536 1 wff ×c = (𝑟 ∈ V, 𝑠 ∈ V ↦ ((Base‘𝑟) × (Base‘𝑠)) / 𝑏(𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))) / {⟨(Base‘ndx), 𝑏⟩, ⟨(Hom ‘ndx), ⟩, ⟨(comp‘ndx), (𝑥 ∈ (𝑏 × 𝑏), 𝑦𝑏 ↦ (𝑔 ∈ ((2nd𝑥)𝑦), 𝑓 ∈ (𝑥) ↦ ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩))⟩})
Colors of variables: wff setvar class
This definition is referenced by:  fnxpc  17429  xpcval  17430
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