quasitopos, QA299.6-433, extensional topological construct, Topoi, Cartesian closed topological hull, Topological construct, topological construct, Extensional topological construct, Categories of topological spaces and continuous mappings, Cartesian closed category, Quasitopos, Closure space, closure space, Function spaces in general topology, cartesian closed category, QA1-939, Closed categories (closed monoidal and Cartesian closed categories, etc.), Topological spaces and generalizations (closure spaces, etc.), Categories admitting limits (complete categories), functors preserving limits, completions, cartesian closed topological hull, Mathematics, Analysis