Direct and Elementary Approach to Enumerate Topologies on a Finite Set
Faculty of Science
Department of Mathematics
King Khaled University
be a set with
elements, and let
be the set of all labelled topologies on
open sets, and
. In this
paper, we use a direct approach to compute
Full version: pdf,
(Concerned with sequences
Received April 19 2006;
revised version received February 28 2007.
Published in Journal of Integer Sequences March 19 2007.
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