Gorensteinness for normal tangent cones of elliptic ideals

Tomohiro Okuma, Kei-ichi Watanabe, Ken-ichi Yoshida

Let $A$ be a two-dimensional excellent normal Gorenstein local domain. In this paper, we characterize elliptic ideals $I\subset A$ for its normal tangent cone $\overline{G}(I)$ to…