Bulgak, Ayşe; Demidenko, Gennadii; Matveeva, Inessa
(Selcuk University Research Center of Applied Mathematics, 2003)
In the present article we consider the problem on location of the spectrum of an arbitrary matrix $A$ inside the ellipse
calE=lambdainC:frac(Relambda)2a2+frac(Imlambda)2b2=1,quada>b.
calE=lambdainC:frac(Relambda)2a2+fr ...