# 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 NeighborhoodSystem 2013-03-22 12:22:18 2013-03-22 12:22:18 Mathprof (13753) Mathprof (13753) 6 Mathprof (13753) Definition msc 54-00 fundamental system of neighborhoods Neighborhood LocalBase