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Definition df-xpc 16581
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 16577 . 2 class ×c
2 vr . . 3 setvar 𝑟
3 vs . . 3 setvar 𝑠
4 cvv 3172 . . 3 class V
5 vb . . . 4 setvar 𝑏
62cv 1473 . . . . . 6 class 𝑟
7 cbs 15641 . . . . . 6 class Base
86, 7cfv 5790 . . . . 5 class (Base‘𝑟)
93cv 1473 . . . . . 6 class 𝑠
109, 7cfv 5790 . . . . 5 class (Base‘𝑠)
118, 10cxp 5026 . . . 4 class ((Base‘𝑟) × (Base‘𝑠))
12 vh . . . . 5 setvar
13 vu . . . . . 6 setvar 𝑢
14 vv . . . . . 6 setvar 𝑣
155cv 1473 . . . . . 6 class 𝑏
1613cv 1473 . . . . . . . . 9 class 𝑢
17 c1st 7034 . . . . . . . . 9 class 1st
1816, 17cfv 5790 . . . . . . . 8 class (1st𝑢)
1914cv 1473 . . . . . . . . 9 class 𝑣
2019, 17cfv 5790 . . . . . . . 8 class (1st𝑣)
21 chom 15725 . . . . . . . . 9 class Hom
226, 21cfv 5790 . . . . . . . 8 class (Hom ‘𝑟)
2318, 20, 22co 6527 . . . . . . 7 class ((1st𝑢)(Hom ‘𝑟)(1st𝑣))
24 c2nd 7035 . . . . . . . . 9 class 2nd
2516, 24cfv 5790 . . . . . . . 8 class (2nd𝑢)
2619, 24cfv 5790 . . . . . . . 8 class (2nd𝑣)
279, 21cfv 5790 . . . . . . . 8 class (Hom ‘𝑠)
2825, 26, 27co 6527 . . . . . . 7 class ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))
2923, 28cxp 5026 . . . . . 6 class (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))
3013, 14, 15, 15, 29cmpt2 6529 . . . . 5 class (𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))))
31 cnx 15638 . . . . . . . 8 class ndx
3231, 7cfv 5790 . . . . . . 7 class (Base‘ndx)
3332, 15cop 4130 . . . . . 6 class ⟨(Base‘ndx), 𝑏
3431, 21cfv 5790 . . . . . . 7 class (Hom ‘ndx)
3512cv 1473 . . . . . . 7 class
3634, 35cop 4130 . . . . . 6 class ⟨(Hom ‘ndx),
37 cco 15726 . . . . . . . 8 class comp
3831, 37cfv 5790 . . . . . . 7 class (comp‘ndx)
39 vx . . . . . . . 8 setvar 𝑥
40 vy . . . . . . . 8 setvar 𝑦
4115, 15cxp 5026 . . . . . . . 8 class (𝑏 × 𝑏)
42 vg . . . . . . . . 9 setvar 𝑔
43 vf . . . . . . . . 9 setvar 𝑓
4439cv 1473 . . . . . . . . . . 11 class 𝑥
4544, 24cfv 5790 . . . . . . . . . 10 class (2nd𝑥)
4640cv 1473 . . . . . . . . . 10 class 𝑦
4745, 46, 35co 6527 . . . . . . . . 9 class ((2nd𝑥)𝑦)
4844, 35cfv 5790 . . . . . . . . 9 class (𝑥)
4942cv 1473 . . . . . . . . . . . 12 class 𝑔
5049, 17cfv 5790 . . . . . . . . . . 11 class (1st𝑔)
5143cv 1473 . . . . . . . . . . . 12 class 𝑓
5251, 17cfv 5790 . . . . . . . . . . 11 class (1st𝑓)
5344, 17cfv 5790 . . . . . . . . . . . . . 14 class (1st𝑥)
5453, 17cfv 5790 . . . . . . . . . . . . 13 class (1st ‘(1st𝑥))
5545, 17cfv 5790 . . . . . . . . . . . . 13 class (1st ‘(2nd𝑥))
5654, 55cop 4130 . . . . . . . . . . . 12 class ⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩
5746, 17cfv 5790 . . . . . . . . . . . 12 class (1st𝑦)
586, 37cfv 5790 . . . . . . . . . . . 12 class (comp‘𝑟)
5956, 57, 58co 6527 . . . . . . . . . . 11 class (⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))
6050, 52, 59co 6527 . . . . . . . . . 10 class ((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓))
6149, 24cfv 5790 . . . . . . . . . . 11 class (2nd𝑔)
6251, 24cfv 5790 . . . . . . . . . . 11 class (2nd𝑓)
6353, 24cfv 5790 . . . . . . . . . . . . 13 class (2nd ‘(1st𝑥))
6445, 24cfv 5790 . . . . . . . . . . . . 13 class (2nd ‘(2nd𝑥))
6563, 64cop 4130 . . . . . . . . . . . 12 class ⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩
6646, 24cfv 5790 . . . . . . . . . . . 12 class (2nd𝑦)
679, 37cfv 5790 . . . . . . . . . . . 12 class (comp‘𝑠)
6865, 66, 67co 6527 . . . . . . . . . . 11 class (⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))
6961, 62, 68co 6527 . . . . . . . . . 10 class ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))
7060, 69cop 4130 . . . . . . . . 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 6529 . . . . . . . 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 6529 . . . . . . 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 4130 . . . . . 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 4128 . . . . 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 3498 . . . 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 3498 . . 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 6529 . 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 1474 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  16585  xpcval  16586
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