##  [Π-Character](/p-character) 

  ##  [Π-Character](https://puremath.quantumdictionary.io/p-character-0) 

  

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**Pure Mathematics Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The least cardinality of a local π-base at a point, i.e. a family of nonempty open sets such that every neighborhood of the point contains at least one member; commonly denoted Πχ(x,X) or Πχ(X) for the supremum over points.