Definition df-ple 17079

Description: Define "less than or equal to" ordering extractor for posets and related structures. (Contributed by NM, 4-Sep-2011.) (Revised by Mario Carneiro, 14-Aug-2015.) (Revised by AV, 9-Sep-2021.) Use its index-independent form pleid 17174 instead. (New usage is discouraged.)

Assertion

Ref	Expression
df-ple	⊢ le = Slot ;10

Detailed syntax breakdown of Definition df-ple

Step	Hyp	Ref	Expression
1		cple 17066	. 2 class le
2		c1 10973	. . . 4 class 1
3		cc0 10972	. . . 4 class 0
4	2, 3	cdc 12538	. . 3 class ;10
5	4	cslot 16979	. 2 class Slot ;10
6	1, 5	wceq 1540	1 wff le = Slot ;10

This definition is referenced by:  plendx  17173  pleid  17174  0posOLD  18137  isposixOLD  18141  oppgleOLD  31526