Alessio Corti, Imperial College Londra Mirror symmetry and smoothing toric Fano 3-folds Lunedì 06 Maggio 2019, ore 14:00 Sala di Rappresentanza, Dipartimento di Matematica, Via C. Saldini 50, Milano |
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Jos Uffink, University of Minnesota Lanford’s Theorem and the Emergence of Irreversibility Martedì 12 Marzo 2019, ore 16:30 precise Sala Consiglio, 7 piano, Ed. La Nave |
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Bruno Klingler, Humboldt Universitaet Berlino Tame topology and algebraic geometry Lunedì 11 Marzo 2019, ore 16:30 precise Aula Seminari 6 piano, Ed. La Nave |
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Anton Baranov, Saint Petersburg State University Spectral synthesis for systems of exponentials and reproducing kernels Giovedì 07 Febbraio 2019, ore 16:00 Sala di Rappresentanza, Dipartimento di Matematica, Via C. Saldini 50, Milano |
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Abstract
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Let $x_n$ be a complete and minimal system of vectors in a Hilbert space $H$. We say that this system is hereditarily complete or admits spectral synthesis if any vector in $H$ can be approximated by linear combinations of partial sums of the Fourier series with respect to $x_n$. It was a long-standing problem whether any complete and minimal system of exponentials in $L^2(-a,a)$ admits spectral synthesis. Several years ago we gave a negative answer to this question. At the same time we showed that any such system admits the synthesis up to a one- dimensional defect. In the talk we will also discuss related problems for systems of reproducing kernels in Hilbert spaces of entire functions (such as Paley-Wiener, de Branges, Fock). |
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Guido Kings, Università di Regensburg The Birch-Swinnerton-Dyer conjecture, some recent progress Lunedì 07 Gennaio 2019, ore 16:00 Aula C, Dipartimento di Matematica, Via C. Saldini 50, Milano |
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Arkady Tsinober, Tel Aviv University Turbulence versus Mathematics and vice versa Martedì 04 Dicembre 2018, ore 16:00 Aula 3015 del Dipartimento di Matematica e Applicazioni dell'Università di Milano - Bicocca |
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