This paper briefly summarizes Ulrich Fehl’s important contributions to Austrian capital theory. While his work is well known in Europe he remains a relative unknown to the English speaking world. The intent of this paper is to introduce Ulrich Fehl to English-speaking economists who are interested in the Austrian School of economics. Ulrich Fehl (born in 1939) was full professor for General Eco...

Abstract We provide a criterion for coherent sheaf to be an Ulrich in terms of certain bilinear form on its global sections. When working over the real numbers, we call it positive if this is symmetric or Hermitian and positive-definite. In that case, our result provides common theoretical framework several results algebraic geometry concerning existence certificates geometric properties. For i...