K. Zajkowski

activity

20042021

most citedBounds on tail probabilities for quadratic forms in dependent sub-gaussian random variables

11 citations · 29 across the 13 of their papers we have counts for

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math.FA2014

Fejer's approximation of continuous functions of unitary operators

Krzysztof Zajkowski

This paper is concerned with a certain aspect of the spectral theory of unitary operators in a Hilbert space and its aim is to give an explicit construction of continuous functions…

math.FA2011

Convex conjugates of analytic functions of logarithmically convex functionals

Krzysztof Zajkowski

Let $f_{c} (r) = \sum_{n = 0}^{\infty} e^{c_{n}} r^{n}$ be an analytic function; $c = (c_{n}) \in l_{\infty}$ . We assume that $r$ is some logarithmically convex and lower semicontinuous fun…