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The Joint Numerical Range of Bordered and Tridiagonal Matrices

The Joint Numerical Range of Bordered and Tridiagonal Matrices

2002
Abstract
30 Maria Adam and John Maroulas Recently a connection of Co {JNR [^ m]^= 1} with the numerical range of matrix polynomial P (X)= AkXk~ l+...+ A2X+ A1 has been presented in [PT]. Precisely, it is noticed that NR [P (A)]={A eC: x* P (X) x= 0, x£ Cn\{0}} ={A eC: cfcA*-1+...+ ...

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