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

Related terms: abstract algebra   associative algebra   bijective   discriminant   empty set   exclusive disjunction   fnof   if the discriminant   iff   invertible   le b   linear map   mathbb   matrices   nilpotent   polynomial   proper subset   quadratic form   quadratic formula   quadratic polynomial   quintic   real numbers   solvable   subseteq   symmetric   there exists   topological spaces   two sets   vector space   we say

Wikipedia sources: Argument   Bipartite graph   Cardinal number   Commutator   Concave function   Continuous function   Convex function   Diagonal matrix   Diagonalizable matrix   Discriminant   Galois theory   Homomorphism   If and only if   Interval (mathematics)   Inverse function   Isomorphism   Lie algebra   Limit of a function   Metric (mathematics)   Partially ordered set   Petri net   Planar graph   Poisson process   Positive-definite matrix   Projection (linear algebra)   Rank (linear algebra)   Riemann integral   Set (mathematics)   Third normal form   Topological space

Context for words: if   and   only   if