%0 Journal Article
%T Acerca del ret¨ªculo de las pretopolog¨ªas sobre un conjunto X
%A P¨¢EZ D¨ªAZ
%A F¨¦LIX A.
%J Revista Integraci¨®n
%D 2011
%I Universidad Industrial de Santander
%X abstract. we show that (pretop(x),¡Ü), the lattice of pretopologies on an arbitrary set x, always has a framework; we present a characterization of the co-atoms in pretop(x) in terms of ultratopologies on x.
%K lattice
%K pretopologies
%K complete lattices frameworks
%K ultratopologies.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-419X2011000200003&lng=en&nrm=iso&tlng=en