duality
translates mathematical concepts into other concepts, in a one-to-one fashion
duality of Lp spaces
natural isomorphism between the dual space of Lp and the space Lq if 1/p+1/q=1
duality of voltage and current
dualities between elements or properties of electrical circuits, such as between voltage and current
electromagnetic duality
duality between electrical and magnetic phenomena
mirror symmetry
conjectured relation between pairs of Calabi–Yau manifolds; situation where two Calabi–Yau manifolds look very different geometrically but are nevertheless equivalent when employed as extra dimensions of string theory
Verdier duality
duality for sheaves of k-modules over a locally compact space
dual norm
measurement on a normed vector space
conjunction/disjunction duality
properties linking logical conjunction and disjunction