- (of a bilinear form) ósérstæður, óúrkynjaður
= non-degenerate - (of a curve) ósérstæður, reglulegur
-> regular curve - (of a matrix)) umhverfanlegur, andhverfanlegur, reglulegur, ósérstæður
-> non-singular matrix - (of an algebraic or analytic variety) ósérstæður, reglulegur