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math.SP2022
Gradients of Quotients and Eigenvalue Problems
Marko Huhtanen, Olavi Nevanlinna
Intertwining analysis, algebra, numerical analysis and optimization, computing conjugate co-gradients of real-valued quotients gives rise to eigenvalue problems. In the linear Herm…
math.FA2022
Simplifying operators by polynomials
Olavi Nevanlinna
We collect and organise known results and add some new ones of the following nature: if A is a bounded operator in a Hilbert or Banach space, does there exist a nonconstant polynom…