Infinitesimale Deformationen von Diedersingularitäten. (Infinitesimal deformations of dihedral singularities) (Q804769)

In the case of quotient singularities \textit{O. Riemenschneider}, the author and \textit{J. Wahl} in Math. Ann. 286, No.1-3, 529-535 (1990; Zbl 0681.14018) computed the \({\mathbb{C}}\)-dual space \(T^{1*}\) of the vector space of infinitesimal deformations and the orthogonal complement of the Artin component in \(T^{1*}.\) In the paper under review similar computations are carried out in the case of dihedral singularities. This simplifies earlier computations by \textit{K. Behnke} and \textit{O. Riemenschneider} in Manuscr. Math. 20, 377- 400 (1977; Zbl 0354.32031); corrections in 24, 81 (1978).