Title of article :
Some results on the polynomial numerical hulls of matrices
Author/Authors :
AFSHIN, H. R , MEHRJOOFARD, M. A , SALEMI, A
Abstract :
In this note we characterize polynomial numerical hulls of matrices AinMnAinMn such that A2A2 is Hermitian. Also, we consider normal matrices AinMnAinMn whose kthkth power are semidefinite. For such matrices we show that k(A)=sigma(A)Vk(A)=sigma(A).
Keywords :
Polynomial numerical hull , joint numerical range , normal matrices
Journal title :
Astroparticle Physics
