Journal of Algebra, Number Theory: Advances and Applications[1] R. Benedetti and J. J. Rister, Real Algebraic and Semi-algebraic
Sets, Hermann, Paris, 1990.
[2] C. Davis and A. Salemi, On polynomial numerical hulls of normal
matrices, Linear Algebra Appl. 383 (2004), 151-161.
[3] C. Davis, C. K. Li and A. Salemi, Polynomial numerical hulls of
matrices, Linear Algebra Appl. 428(1) (2008), 137-153.
[4] V. Faber, W. Joubert, E. Knill and T. Manteuffel, Minimal residual
method stronger than polynomial preconditioning, SIAM J. Matrix Anal.
Appl. 17 (1996), 707-729.
[5] A. Greenbaum, Generalizations of the field of values useful in the
study of polynomial functions of a matrix, Linear Algebra Appl. 347
(2002), 233-249.
[6] F. Hausdorff, Das Wertevorrat einer bilinear form, Math. Zeit. 3
(1919), 314-316.
[7] A. Salemi and Gh. R. Aghamollaei, Polynomial numerical hulls of
matrix polynomials, Linear Multilinear Algebra 55 (2007), 219-228.
