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math.CA2017
Approximate homomorphisms on lattices
Roman Badora, Tomasz Kochanek, Barbara Przebieracz
We prove two results concerning an Ulam-type stability problem for homomorphisms between lattices. One of them involves estimates by quite general error functions; the other deals…
math.CA2012
Almost orthogonally additive functions
Tomasz Kochanek, Wirginia Wyrobek-Kochanek
If a function , acting on a Euclidean space , is "almost" orthogonally additive in the sense that for all , where i…