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Definition df-xpc 16859
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 16855 . 2 class ×c
2 vr . . 3 setvar 𝑟
3 vs . . 3 setvar 𝑠
4 cvv 3231 . . 3 class V
5 vb . . . 4 setvar 𝑏
62cv 1522 . . . . . 6 class 𝑟
7 cbs 15904 . . . . . 6 class Base
86, 7cfv 5926 . . . . 5 class (Base‘𝑟)
93cv 1522 . . . . . 6 class 𝑠
109, 7cfv 5926 . . . . 5 class (Base‘𝑠)
118, 10cxp 5141 . . . 4 class ((Base‘𝑟) × (Base‘𝑠))
12 vh . . . . 5 setvar
13 vu . . . . . 6 setvar 𝑢
14 vv . . . . . 6 setvar 𝑣
155cv 1522 . . . . . 6 class 𝑏
1613cv 1522 . . . . . . . . 9 class 𝑢
17 c1st 7208 . . . . . . . . 9 class 1st
1816, 17cfv 5926 . . . . . . . 8 class (1st𝑢)
1914cv 1522 . . . . . . . . 9 class 𝑣
2019, 17cfv 5926 . . . . . . . 8 class (1st𝑣)
21 chom 15999 . . . . . . . . 9 class Hom
226, 21cfv 5926 . . . . . . . 8 class (Hom ‘𝑟)
2318, 20, 22co 6690 . . . . . . 7 class ((1st𝑢)(Hom ‘𝑟)(1st𝑣))
24 c2nd 7209 . . . . . . . . 9 class 2nd
2516, 24cfv 5926 . . . . . . . 8 class (2nd𝑢)
2619, 24cfv 5926 . . . . . . . 8 class (2nd𝑣)
279, 21cfv 5926 . . . . . . . 8 class (Hom ‘𝑠)
2825, 26, 27co 6690 . . . . . . 7 class ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))
2923, 28cxp 5141 . . . . . 6 class (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣)))
3013, 14, 15, 15, 29cmpt2 6692 . . . . 5 class (𝑢𝑏, 𝑣𝑏 ↦ (((1st𝑢)(Hom ‘𝑟)(1st𝑣)) × ((2nd𝑢)(Hom ‘𝑠)(2nd𝑣))))
31 cnx 15901 . . . . . . . 8 class ndx
3231, 7cfv 5926 . . . . . . 7 class (Base‘ndx)
3332, 15cop 4216 . . . . . 6 class ⟨(Base‘ndx), 𝑏
3431, 21cfv 5926 . . . . . . 7 class (Hom ‘ndx)
3512cv 1522 . . . . . . 7 class
3634, 35cop 4216 . . . . . 6 class ⟨(Hom ‘ndx),
37 cco 16000 . . . . . . . 8 class comp
3831, 37cfv 5926 . . . . . . 7 class (comp‘ndx)
39 vx . . . . . . . 8 setvar 𝑥
40 vy . . . . . . . 8 setvar 𝑦
4115, 15cxp 5141 . . . . . . . 8 class (𝑏 × 𝑏)
42 vg . . . . . . . . 9 setvar 𝑔
43 vf . . . . . . . . 9 setvar 𝑓
4439cv 1522 . . . . . . . . . . 11 class 𝑥
4544, 24cfv 5926 . . . . . . . . . 10 class (2nd𝑥)
4640cv 1522 . . . . . . . . . 10 class 𝑦
4745, 46, 35co 6690 . . . . . . . . 9 class ((2nd𝑥)𝑦)
4844, 35cfv 5926 . . . . . . . . 9 class (𝑥)
4942cv 1522 . . . . . . . . . . . 12 class 𝑔
5049, 17cfv 5926 . . . . . . . . . . 11 class (1st𝑔)
5143cv 1522 . . . . . . . . . . . 12 class 𝑓
5251, 17cfv 5926 . . . . . . . . . . 11 class (1st𝑓)
5344, 17cfv 5926 . . . . . . . . . . . . . 14 class (1st𝑥)
5453, 17cfv 5926 . . . . . . . . . . . . 13 class (1st ‘(1st𝑥))
5545, 17cfv 5926 . . . . . . . . . . . . 13 class (1st ‘(2nd𝑥))
5654, 55cop 4216 . . . . . . . . . . . 12 class ⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩
5746, 17cfv 5926 . . . . . . . . . . . 12 class (1st𝑦)
586, 37cfv 5926 . . . . . . . . . . . 12 class (comp‘𝑟)
5956, 57, 58co 6690 . . . . . . . . . . 11 class (⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))
6050, 52, 59co 6690 . . . . . . . . . 10 class ((1st𝑔)(⟨(1st ‘(1st𝑥)), (1st ‘(2nd𝑥))⟩(comp‘𝑟)(1st𝑦))(1st𝑓))
6149, 24cfv 5926 . . . . . . . . . . 11 class (2nd𝑔)
6251, 24cfv 5926 . . . . . . . . . . 11 class (2nd𝑓)
6353, 24cfv 5926 . . . . . . . . . . . . 13 class (2nd ‘(1st𝑥))
6445, 24cfv 5926 . . . . . . . . . . . . 13 class (2nd ‘(2nd𝑥))
6563, 64cop 4216 . . . . . . . . . . . 12 class ⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩
6646, 24cfv 5926 . . . . . . . . . . . 12 class (2nd𝑦)
679, 37cfv 5926 . . . . . . . . . . . 12 class (comp‘𝑠)
6865, 66, 67co 6690 . . . . . . . . . . 11 class (⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))
6961, 62, 68co 6690 . . . . . . . . . 10 class ((2nd𝑔)(⟨(2nd ‘(1st𝑥)), (2nd ‘(2nd𝑥))⟩(comp‘𝑠)(2nd𝑦))(2nd𝑓))
7060, 69cop 4216 . . . . . . . . 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 6692 . . . . . . . 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 6692 . . . . . . 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 4216 . . . . . 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 4214 . . . . 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 3566 . . . 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 3566 . . 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 6692 . 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 1523 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  16863  xpcval  16864
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