Example image of eyePlorer eyePlorer map for 'Interior algebra': Abstract algebra Algebraic structure Interior Boolean algebra (structure) Modal logic Propositional calculus Set theory Topology Modal algebra Variety (universal algebra) Closure operator Duality (order theory) Signature (logic) Unary operation Open set Closed set Complement Glossary of topology Clopen set Homomorphism If and only if Morphism Interior algebra Power set Topological space Atom (order theory) Completeness (order theory) Embedding Field of sets Isomorphism Continuous function Category of topological spaces Category theory Functor Open and closed maps Alexandrov topology Compact space Connected space Discrete space Empty set Semisimple Simple algebra Subdirect irreducible Trivial topology Ultraconnected space Universal algebra Filter (mathematics) Neighbourhood (mathematics) Semilattice Lindenbaum–Tarski algebra