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Definition df-negs 27323
Description: Define surreal negation. Definition from [Conway] p. 5. (Contributed by Scott Fenton, 20-Aug-2024.)
Assertion
Ref Expression
df-negs -us = norec ((𝑥 ∈ V, 𝑛 ∈ V ↦ ((𝑛 “ ( R ‘𝑥)) |s (𝑛 “ ( L ‘𝑥)))))
Distinct variable group:   𝑥,𝑛

Detailed syntax breakdown of Definition df-negs
StepHypRef Expression
1 cnegs 27321 . 2 class -us
2 vx . . . 4 setvar 𝑥
3 vn . . . 4 setvar 𝑛
4 cvv 3446 . . . 4 class V
53cv 1541 . . . . . 6 class 𝑛
62cv 1541 . . . . . . 7 class 𝑥
7 cright 27179 . . . . . . 7 class R
86, 7cfv 6497 . . . . . 6 class ( R ‘𝑥)
95, 8cima 5637 . . . . 5 class (𝑛 “ ( R ‘𝑥))
10 cleft 27178 . . . . . . 7 class L
116, 10cfv 6497 . . . . . 6 class ( L ‘𝑥)
125, 11cima 5637 . . . . 5 class (𝑛 “ ( L ‘𝑥))
13 cscut 27125 . . . . 5 class |s
149, 12, 13co 7358 . . . 4 class ((𝑛 “ ( R ‘𝑥)) |s (𝑛 “ ( L ‘𝑥)))
152, 3, 4, 4, 14cmpo 7360 . . 3 class (𝑥 ∈ V, 𝑛 ∈ V ↦ ((𝑛 “ ( R ‘𝑥)) |s (𝑛 “ ( L ‘𝑥))))
1615cnorec 27252 . 2 class norec ((𝑥 ∈ V, 𝑛 ∈ V ↦ ((𝑛 “ ( R ‘𝑥)) |s (𝑛 “ ( L ‘𝑥)))))
171, 16wceq 1542 1 wff -us = norec ((𝑥 ∈ V, 𝑛 ∈ V ↦ ((𝑛 “ ( R ‘𝑥)) |s (𝑛 “ ( L ‘𝑥)))))
Colors of variables: wff setvar class
This definition is referenced by:  negsfn  27325  negsval  27327
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