Definition df-le 8000

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 7995	. 2 class <_
2		cxr 7993	. . . 4 class RR*
3	2, 2	cxp 4626	. . 3 class ( RR* X. RR* )
4		clt 7994	. . . 4 class <
5	4	ccnv 4627	. . 3 class `' <
6	3, 5	cdif 3128	. 2 class ( ( RR* X. RR* ) \ `' < )
7	1, 6	wceq 1353	1 wff <_ = ( ( RR* X. RR* ) \ `' < )

This definition is referenced by:  lerelxr  8022  xrlenlt  8024