Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for BJ
Extended real and complex numbers, real and complex projective lines
Extended numbers and projective lines as sets
crrhat
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df-bj-rrhat
Metamath Proof Explorer
Unicode
Structured
Syntax definition
crrhat
Description:
Syntax for
RRhat
.
Ref
Expression
Assertion
crrhat
class RRhat