Alexandrov topology

noun1

1. •
   A topology in which the intersection of any family of open sets is an open set.

   • (6) S_0,2(P(R_C)) is the family of open sets of the Alexandrov topology induced by R_C and S(P(R_C)) is the family of closed sets of the Alexandrov topology induced by R^⌣_C — 2016