Zero Divisors and Idempotents in Group Rings
Zero Divisors and Idempotents in Group Rings
We consider the following problem: If KG is the group ring of a torsion free group over a field K, show that KG has no divisors of zero. At characteristic zero, major progress was made by Brown [ 2 ], who solved the problem for G abelian-by-finite, and then by …