Title: Essential cohomology for elementary abelian p-groups
Authors: Fatma Altunbulak Aksu (Bilkent, Turkey)
         David J. Green (Jena, Germany)
Date: 25 September 2008
Status: Submitted for publication
MSC 2000: Primary 20J06; Secondary 13A50, 55S10
arXiv:0809.4425v1 [math.GR]

Abstract:
For an odd prime p the cohomology ring of an elementary abelian
p-group is polynomial tensor exterior. We show that the
ideal of essential classes is the Steenrod closure of the
class generating the top exterior power. As a module over the
polynomial algebra, the essential ideal is free on the set of
Mui invariants.