Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for BJ
Extended real and complex numbers, real and complex projective lines
Divisibility
cnnbar
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df-bj-nnbar
Metamath Proof Explorer
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Unicode
Syntax definition
cnnbar
Description:
Syntax for the extended natural numbers.
Ref
Expression
Assertion
cnnbar
class
ℕ
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