Quotient TopologyCovers the concept of quotient spaces and the quotient topology, defining open sets and characterizing functions.
Boundary AnalysisExplores boundaries in sets, defining them as points not well separated from the set or its complement.
Normed SpacesCovers normed spaces, dual spaces, Banach spaces, Hilbert spaces, weak and strong convergence, reflexive spaces, and the Hahn-Banach theorem.