The Ekedahl Invariants for finite groups

14 Aug 2015  ·  Martino Ivan ·

In 2009 Ekedahl introduced certain cohomological invariants of finite groups which are naturally related to the Noether Problem. We show that these invariants are trivial for every finite group in GL_3(k) and for the fifth discrete Heisenberg group H_5... Moreover in the case of finite linear groups with abelian projective reduction, these invariants satisfy a recurrence relation in a certain Grothendieck group for abelian groups. read more

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Algebraic Geometry Group Theory K-Theory and Homology