neighborhood system

Let $(X,\tau )$ be a topological space and $x\in X$. The neighborhood system around $x$ is the family of all the neighborhoods of $x$.

Title	neighborhood system
Canonical name	NeighborhoodSystem
Date of creation	2013-03-22 12:22:18
Last modified on	2013-03-22 12:22:18
Owner	Mathprof (13753)
Last modified by	Mathprof (13753)
Numerical id	6
Author	Mathprof (13753)
Entry type	Definition
Classification	msc 54-00
Synonym	fundamental system of neighborhoods
Related topic	Neighborhood
Related topic	LocalBase