Since 2000 he has been a member of the Heidelberg Academy of Sciences .
From 1990 to 1998 he was an editor of Mathematischen Annalen and from 1998 to 2002 for Archiv der Mathematik .
Since 2000 editor has been a editor of the Heidelberg Academy of Sciences .
From 1990 to 1998 he was an editor of Mathematischen Annalen and from 1998 to 2002 for Archiv der Mathematik .