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
ccchat
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df-bj-cchat
Metamath Proof Explorer
Ascii
Structured
Syntax definition
ccchat
Description:
Syntax for
CChat
.
Ref
Expression
Assertion
ccchat
class
ℂ̂