Global Fields

July 2 - 6, 2007, Moscow, Russia

Laboratoire J.-V. Poncelet

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Serge Vladut

Institut de Mathematiques de Luminy, France

Some new constructions of expander graphs

We give a review of some expander constructions using error-correcting codes and group algebras. We show that applying these constructions to properly choosed codes on modular curves one obtains some new intersting expander graphs.