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"The Numerical Range of Self-Adjoint Quadratic Matrix Polynomials."
Peter Lancaster, Panayiotis J. Psarrakos (2002)
- Peter Lancaster, Panayiotis J. Psarrakos:
The Numerical Range of Self-Adjoint Quadratic Matrix Polynomials. SIAM J. Matrix Anal. Appl. 23(3): 615-631 (2002)
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