Discrete Groups, Expanding Graphs and Invariant Measures : Appendix by Jonathan D. Rogawski

Lingua: inglese

Editore: Springer, Basel, Birkhäuser Verlag, Birkhäuser, 2009

3034603312 / 9783034603317

Da: AHA-BUCH GmbH, Einbeck, GermaniaAHA-BUCH GmbH

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Druck auf Anfrage Neuware - Printed after ordering - In the last fteen years two seemingly unrelated problems, one in computer science and the other in measure theory, were solved by amazingly similar techniques from representation theory and from analytic number theory. One problem is the - plicit construction of expanding graphs ('expanders'). These are highly connected sparse graphs whose existence can be easily demonstrated but whose explicit c- struction turns out to be a dif cult task. Since expanders serve as basic building blocks for various distributed networks, an explicit construction is highly des- able. The other problem is one posed by Ruziewicz about seventy years ago and studied by Banach [Ba]. It asks whether the Lebesgue measure is the only nitely additive measure of total measure one, de ned on the Lebesgue subsets of the n-dimensional sphere and invariant under all rotations. The two problems seem, at rst glance, totally unrelated. It is therefore so- what surprising that both problems were solved using similar methods: initially, Kazhdan's property (T) from representation theory of semi-simple Lie groups was applied in both cases to achieve partial results, and later on, both problems were solved using the (proved) Ramanujan conjecture from the theory of automorphic forms. The fact that representation theory and automorphic forms have anything to do with these problems is a surprise and a hint as well that the two questions are strongly related.

Codice articolo 9783034603317

Titolo
Discrete Groups, Expanding Graphs and Invariant Measures : Appendix by Jonathan D. Rogawski
Autore
Alex Lubotzky
Editore
Springer, Basel, Birkhäuser Verlag, Birkhäuser
Anno di pubblicazione
2009
Condizione
Neu
Rilegatura
Taschenbuch
Lingua
inglese
ISBN 10
3034603312
ISBN 13
9783034603317
Edizione
seconda edizione
Peso dell'articolo
352 grammi
Dimensioni
235x155x11 mm

AHA-BUCH GmbH

Einbeck, Germania

Venditore con 5 stelle

Venditore AbeBooks dal 14 agosto 2006

Tariffe di spedizione da Germania a U.S.A.

ArticoloDa 5 a 7 giorni lavorativiDa 7 a 10 giorni lavorativi
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