##  [Π-Weight](/p-weight) 

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

  

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**Pure Mathematics Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The Π-Weight Πw(X) of a topological space X is the least cardinality of a π-network for X: a family of nonempty open sets such that every nonempty open set in X contains at least one member of the family.