Definition df-le 7960

Description: Define 'less than or equal to' on the extended real subset of complex numbers. (Contributed by NM, 13-Oct-2005.)

Assertion

Ref	Expression
df-le	|- <_ = ( ( RR* X. RR* ) \ `' < )

Detailed syntax breakdown of Definition df-le

Step	Hyp	Ref	Expression
1		cle 7955	. 2 class <_
2		cxr 7953	. . . 4 class RR*
3	2, 2	cxp 4609	. . 3 class ( RR* X. RR* )
4		clt 7954	. . . 4 class <
5	4	ccnv 4610	. . 3 class `' <
6	3, 5	cdif 3118	. 2 class ( ( RR* X. RR* ) \ `' < )
7	1, 6	wceq 1348	1 wff <_ = ( ( RR* X. RR* ) \ `' < )

This definition is referenced by:  lerelxr  7982  xrlenlt  7984