"if and only if" - related articles and key terms

Related terms: lor   fnof   le b   mathbb   we say   bounded   matrices   solvable   mathfrak   subseteq   empty set   bijective   nilpotent   euclidean   set of all   isomorphic   invertible   surjective   linear map   real number   vector space   real numbers   there exists   boolean algebra   such that for all   function is called   topological spaces   logical implication   continuous functions   exclusive disjunction

Wikipedia sources: Consistency   Petri net   If and only if   Partially ordered set   Diagonalizable matrix   Planar graph   Entailment   Line graph   Banach space   Bijection   Concave function   Riemann integral   Commutator   Symmetry group   Lie algebra   Boolean algebra (structure)   Happy number   Homomorphism   Galois theory   Surjective function   Bipartite graph   Diagonal matrix   Plane (geometry)   Naive set theory   Topological space   Convergent series   Lipschitz continuity   Metric (mathematics)   Projection (linear algebra)   Negative and non-negative numbers

Context for words: if   and   only   if