Meaning of DUALITY in English


/dooh al"i tee, dyooh-/ , n.

1. a dual state or quality.

2. Math. a symmetry within a mathematical system such that a theorem remains valid if certain objects, relations, or operations are interchanged, as the interchange of points and lines in a plane in projective geometry.

[ 1350-1400; ME dualitie dualitas. See DUAL, -ITY ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .