Matches in DBpedia 2015-10 for { ?s ?p "In general topology, a branch of mathematics, the Appert topology, named for Appert (1934), is an example of a topology on the set Z+ = {1, 2, 3, …} of positive integers. To give Z+ a topology means to say which subsets of Z+ are open in a manner that satisfies certain axioms: The union of open sets is an open set. The finite intersection of open sets is an open set."@en }
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- Appert_topology comment "In general topology, a branch of mathematics, the Appert topology, named for Appert (1934), is an example of a topology on the set Z+ = {1, 2, 3, …} of positive integers. To give Z+ a topology means to say which subsets of Z+ are open in a manner that satisfies certain axioms: The union of open sets is an open set. The finite intersection of open sets is an open set.".