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Definition df-ple 12080
Description: Define "less than or equal to" ordering extractor for posets and related structures. We use ; 1 0 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 ; 1 0

Detailed syntax breakdown of Definition df-ple
StepHypRef Expression
1 cple 12067 . 2  class  le
2 c1 7645 . . . 4  class  1
3 cc0 7644 . . . 4  class  0
42, 3cdc 9206 . . 3  class ; 1 0
54cslot 11997 . 2  class Slot ; 1 0
61, 5wceq 1332 1  wff  le  = Slot ; 1 0
Colors of variables: wff set class
This definition is referenced by:  plendx  12153  pleid  12154  pleslid  12155
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