Blocks And Source Algebras Of SL(2,p)

Let (?) be a discrete valuation ring of characteristic 0 with an algebraically closed residue field k of characteristic p>0.In this thesis,we prove that if p>3,the two block algebras of SL(2,p)over (?) with non trivial defect group are basic Morita equivalent.When p>5,the source algebras of the two blocks are not isomorphic as (?)-algebras.