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math.FA2019
A note on real operator monotone functions
Marcell Gaál, Miklós Pálfia
In this paper we initiate the study of real operator monotonicity for functions of tuples of operators, which are multivariate structured maps with a functional calculus called fre…
math.FA2018
Integral comparisons of nonnegative positive definite functions on LCA groups
Marcell Gaál, Szilárd Gy. Révész
In this paper we investigate the following questions. Let be two regular Borel measures of finite total variation. When do we have a constant satisfying $$\int f dν\le C…
math.FA2017
On isometry groups of self-adjoint traceless and skew-symmetric matrices
Marcell Gaál, Robert M. Guralnick
This note is concerned with isometries on the spaces of self-adjoint traceless matrices. We compute the group of isometries with respect to any unitary similarity invariant norm. T…