Abstract
This paper constructs all the diptych varieties with $de\le4$ (see [BR1], Main Theorem 3.3). Our construction involves several new classes of Gorenstein almost homogeneous spaces for $\operatorname{GL}(2)\times\mathbb{G}_m^r$, in particular two infinite series arising from the algebra of apolarity.
Information
Digital Object Identifier: 10.2969/aspm/07410041