D. Happel

collaborators

2 papers

math.RT2012

Algebras of finite global dimension

Dieter Happel, Dan Zacharia

Let $Λ$ be a finite dimensional algebra over an algebraically closed field $k$ . We survey some results on algebras of finite global dimension and address some open problems.

math.AG2012

A note on sheaves without self-extensions on the projective $n$ -space

Dieter Happel, Dan Zacharia

Let $P^{n}$ be the projective $n -$ space over the complex numbers. In this note we show that an indecomposable rigid coherent sheaf on $P^{n}$ has a trivial endomorphism alg…

Algebras of finite global dimension

A note on sheaves without self-extensions on the projective n-space

A note on sheaves without self-extensions on the projective $n$ -space