Algebraic general topology Filters General Topology New short chapter By Victor PortonOn July 2, 2018 I’ve added a new short chapter “Generalized Cofinite Filters” to my book. read more #cofinite filter#cofinite filters#Frechet filter
Algebraic general topology Filters General Topology Generalized cofinite filters By Victor PortonOn November 30, 2016 I have described generalized cofinite filters (including the “cofinite funcoid”). See the draft at http://www.mathematics21.org/binaries/addons.pdf read more #cofinite filter#Frechet filter