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Carpe diem – Raymond E.A.C. Paley: life and scientific work (1907-1933)
Zolotarev, Igor ; Žitný, K.
Raymond Edward Alan Christopher Paley, the student of G.H. Hardy and J.E. Littlewood, influenced the progress of harmonic analysis in the 20th century not only through the proper scientific publications about Fourier analysis in the complex domain, lacunary series, trigonometric interpolation and developments in polynomials, but by means of the collaboration with the co-authors J.E. Littlewood, A. Zygmund and N. Wiener, too.
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Numerický obor a numerický poloměr
Žitný, K. ; Kozánek, Jan
Numerical range and numerical radius as an important instrument for the description of linear operators are analysed in this paper. The possibilities of the computations of the numerical range and numerical radius are presented, too.
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