*Definition [#w9d91379] n denotes a cardinality. A subset family A of a topological space X is said to be locally-n if each point of X has a neighbourhood N such that the cardinality of the set in A which meets N is no more than n.
*Definition [#w9d91379] n denotes a cardinality. A subset family A of a topological space X is said to be locally-n if each point of X has a neighbourhood N such that the cardinality of the set in A which meets N is no more than n.