A new concept for block operator matrices:the quadratic numerical range

By Heinz Langer, A. Markus, V. Matsaev, C. Tretter. 2001

65 citations recorded by the source corpus.

Subfields: Applied Mathematics, Computational Theory and Mathematics, Mathematical Physics

View Paper: https://www.semanticscholar.org/paper/e75be2f33b6db5fd8a81732c25c5e1de1d89f3bd