An elementary construction of tilting complexes

Let A be an artin algebra and e A an idempotent with add(eAA)=add(D(AAe)). Then a projective resolution of AeeAe gives rise to tilting complexes {P(l)•}l 1 for A, where P(l)• is of term length l+1. In particular, if A is self-injective, then is self-injective and has the same Nakayama permutation as A. In case A is a finite dimensional algebra over a field and eAe is a Nakayama algebra, a projective resolution of eAe over the enveloping algebra of eAe gives rise to two-sided tilting complexes {T(2l)•}l 1 for A, where T(2l)• is of term length 2l+1. In particular, if eAe is of Loewy length two, then we get tilting complexes {T(l)•}l 1 for A, where T(l)• is of term length l+1.