Hyperbolicity preservers and majorization

Julius Borcea; Petter Brändén

Comptes Rendus. Mathématique, Volume 348 (2010) no. 15 p. 843-846

Hyperbolic polynomials and spectral order

Julius Borcea; Boris Shapiro

Comptes Rendus. Mathématique, Volume 337 (2003) no. 11 p. 693-698