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Definition df-rpss 6580
Description: Define a relation which corresponds to proper subsethood df-pss 3491 on sets. This allows us to use proper subsethood with general concepts that require relations, such as strict ordering, see sorpss 6585. (Contributed by Stefan O'Rear, 2-Nov-2014.)
Assertion
Ref Expression
df-rpss
Distinct variable group:   ,

Detailed syntax breakdown of Definition df-rpss
StepHypRef Expression
1 crpss 6579 . 2
2 vx . . . . 5
32cv 1394 . . . 4
4 vy . . . . 5
54cv 1394 . . . 4
63, 5wpss 3476 . . 3
76, 2, 4copab 4509 . 2
81, 7wceq 1395 1
Colors of variables: wff setvar class
This definition is referenced by:  relrpss  6581  brrpssg  6582
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