Definition df-ple 12775

Description: Define "less than or equal to" ordering extractor for posets and related structures. We use ;10 for the index to avoid conflict with 1 through 9 used for other purposes. (Contributed by NM, 4-Sep-2011.) (Revised by Mario Carneiro, 14-Aug-2015.) (Revised by AV, 9-Sep-2021.)

Assertion

Ref	Expression
df-ple	⊢ le = Slot ;10

Detailed syntax breakdown of Definition df-ple

Step	Hyp	Ref	Expression
1		cple 12762	. 2 class le
2		c1 7880	. . . 4 class 1
3		cc0 7879	. . . 4 class 0
4	2, 3	cdc 9457	. . 3 class ;10
5	4	cslot 12677	. 2 class Slot ;10
6	1, 5	wceq 1364	1 wff le = Slot ;10

This definition is referenced by:  plendx  12877  pleid  12878  pleslid  12879