Quadratic forms and Azumaya algebras.
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R. Sridharan, M. Ojanguren, M.A. Knus (1978)
Journal für die reine und angewandte Mathematik
Teodor Banica (2012)
Banach Center Publications
This is a presentation of recent work on quantum permutation groups, complex Hadamard matrices, and the connections between them. A long list of problems is included. We include as well some conjectural statements about matrix models.
Danielle GONDARD (1973/1974)
Seminaire de Théorie des Nombres de Bordeaux
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