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Definition df-xpc 16635
 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 16631 . 2 class ×c
2 vr . . 3 setvar 𝑟
3 vs . . 3 setvar 𝑠
4 cvv 3173 . . 3 class V
5 vb . . . 4 setvar 𝑏
62cv 1474 . . . . . 6 class 𝑟
7 cbs 15695 . . . . . 6 class Base
86, 7cfv 5804 . . . . 5 class (Base‘𝑟)
93cv 1474 . . . . . 6 class 𝑠
109, 7cfv 5804 . . . . 5 class (Base‘𝑠)
118, 10cxp 5036 . . . 4 class ((Base‘𝑟) × (Base‘𝑠))
12 vh . . . . 5 setvar
13 vu . . . . . 6 setvar 𝑢
14 vv . . . . . 6 setvar 𝑣
155cv 1474 . . . . . 6 class 𝑏
1613cv 1474 . . . . . . . . 9 class 𝑢
17 c1st 7057 . . . . . . . . 9 class 1st
1816, 17cfv 5804 . . . . . . . 8 class (1st𝑢)
1914cv 1474 . . . . . . . . 9 class 𝑣
2019, 17cfv 5804 . . . . . . . 8 class (1st𝑣)
21 chom 15779 . . . . . . . . 9 class Hom
226, 21cfv 5804 . . . . . . . 8 class (Hom ‘𝑟)
2318, 20, 22co 6549 . . . . . . 7 class ((1st𝑢)(Hom ‘𝑟)(1st𝑣))
24 c2nd 7058 . . . . . . . . 9 class 2nd
2516, 24cfv 5804 . . . . . . . 8 class (2nd𝑢)
2619, 24cfv 5804 . . . . . . . 8 class (2nd𝑣)
279, 21cfv 5804 . . . . . . . 8 class (Hom ‘𝑠)
2825, 26, 27co 6549 . . . . . . 7 class ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))
2923, 28cxp 5036 . . . . . 6 class (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))
3013, 14, 15, 15, 29cmpt2 6551 . . . . 5 class (𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))))
31 cnx 15692 . . . . . . . 8 class ndx
3231, 7cfv 5804 . . . . . . 7 class (Base‘ndx)
3332, 15cop 4131 . . . . . 6 class ⟨(Base‘ndx), 𝑏
3431, 21cfv 5804 . . . . . . 7 class (Hom ‘ndx)
3512cv 1474 . . . . . . 7 class
3634, 35cop 4131 . . . . . 6 class ⟨(Hom ‘ndx),
37 cco 15780 . . . . . . . 8 class comp
3831, 37cfv 5804 . . . . . . 7 class (comp‘ndx)
39 vx . . . . . . . 8 setvar 𝑥
40 vy . . . . . . . 8 setvar 𝑦
4115, 15cxp 5036 . . . . . . . 8 class (𝑏 × 𝑏)
42 vg . . . . . . . . 9 setvar 𝑔
43 vf . . . . . . . . 9 setvar 𝑓
4439cv 1474 . . . . . . . . . . 11 class 𝑥
4544, 24cfv 5804 . . . . . . . . . 10 class (2nd𝑥)
4640cv 1474 . . . . . . . . . 10 class 𝑦
4745, 46, 35co 6549 . . . . . . . . 9 class ((2nd𝑥)𝑦)
4844, 35cfv 5804 . . . . . . . . 9 class (𝑥)
4942cv 1474 . . . . . . . . . . . 12 class 𝑔
5049, 17cfv 5804 . . . . . . . . . . 11 class (1st𝑔)
5143cv 1474 . . . . . . . . . . . 12 class 𝑓
5251, 17cfv 5804 . . . . . . . . . . 11 class (1st𝑓)
5344, 17cfv 5804 . . . . . . . . . . . . . 14 class (1st𝑥)
5453, 17cfv 5804 . . . . . . . . . . . . 13 class (1st ‘(1st𝑥))
5545, 17cfv 5804 . . . . . . . . . . . . 13 class (1st ‘(2nd𝑥))
5654, 55cop 4131 . . . . . . . . . . . 12 class ⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩
5746, 17cfv 5804 . . . . . . . . . . . 12 class (1st𝑦)
586, 37cfv 5804 . . . . . . . . . . . 12 class (comp‘𝑟)
5956, 57, 58co 6549 . . . . . . . . . . 11 class (⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))
6050, 52, 59co 6549 . . . . . . . . . 10 class ((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓))
6149, 24cfv 5804 . . . . . . . . . . 11 class (2nd𝑔)
6251, 24cfv 5804 . . . . . . . . . . 11 class (2nd𝑓)
6353, 24cfv 5804 . . . . . . . . . . . . 13 class (2nd ‘(1st𝑥))
6445, 24cfv 5804 . . . . . . . . . . . . 13 class (2nd ‘(2nd𝑥))
6563, 64cop 4131 . . . . . . . . . . . 12 class ⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩
6646, 24cfv 5804 . . . . . . . . . . . 12 class (2nd𝑦)
679, 37cfv 5804 . . . . . . . . . . . 12 class (comp‘𝑠)
6865, 66, 67co 6549 . . . . . . . . . . 11 class (⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))
6961, 62, 68co 6549 . . . . . . . . . 10 class ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))
7060, 69cop 4131 . . . . . . . . 9 class ⟨((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓)), ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))⟩
7142, 43, 47, 48, 70cmpt2 6551 . . . . . . . 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, 71cmpt2 6551 . . . . . . 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 4131 . . . . . 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 4129 . . . . 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 3499 . . . 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 3499 . . 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, 76cmpt2 6551 . 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 1475 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  16639  xpcval  16640
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