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Definition df-xneg 11347
Description: Define the negative of an extended real number. (Contributed by FL, 26-Dec-2011.)
Assertion
Ref Expression
df-xneg

Detailed syntax breakdown of Definition df-xneg
StepHypRef Expression
1 cA . . 3
21cxne 11344 . 2
3 cpnf 9646 . . . 4
41, 3wceq 1395 . . 3
5 cmnf 9647 . . 3
61, 5wceq 1395 . . . 4
71cneg 9829 . . . 4
86, 3, 7cif 3941 . . 3
94, 5, 8cif 3941 . 2
102, 9wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  xnegeq  11435  xnegex  11436  xnegpnf  11437  xnegmnf  11438  rexneg  11439
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