Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Richard Penner
Additional statements on relations and subclasses
Reflexive closures
crcl
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df-rcl
Metamath Proof Explorer
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Structured
Syntax definition
crcl
Description:
Extend class notation with reflexive closure.
Ref
Expression
Assertion
crcl
class
r*