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Rezension zu: George G. Szpiro : Mathematik für Sonntagmorgen : 50 Geschichten aus Mathematik und Wissenschaft, NZZ Verlag, Zürich 2006, ISBN 978-3-03823-353-4 ; 240 Seiten, 26 Euro/38 CHF George G. Szpiro : Mathematik für Sonntagnachmittag : Weitere 50 Geschichten aus Mathematik und Wissenschaft, NZZ Verlag, Zürich 2006, ISBN 978-3-03823-225-4 ; 236 Seiten, 26 Euro/38 CHF
In recent years using symmetry has proven to be a very useful tool to simplify computations in semidefinite programming. This dissertation examines the possibilities of exploiting discrete symmetries in three contexts: In SDP-based relaxations for polynomial optimization, in testing positivity of symmetric polynomials, and combinatorial optimization. In these contexts the thesis provides new ways for exploiting symmetries and thus deeper insight in the paradigms behind the techniques and studies a concrete combinatorial optimization question.