View source for Subbase

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A family $\gamma$ of open subsets of a [[Topological space|topological space]] $X$ such that the totality of all sets which are intersections of a finite number of elements of $\gamma$ forms a [[Base|base]] of $X$.



====Comments====
The Western term is subbase.

====References====
<table><TR><TD valign="top">[a1]</TD> <TD valign="top">  R. Engelking,   "General topology" , Heldermann  (1989)</TD></TR></table>