{ "id": "1507.05419", "version": "v1", "published": "2015-07-20T08:58:58.000Z", "updated": "2015-07-20T08:58:58.000Z", "title": "On a variety related to the commuting variety of a reductive Lie algebra", "authors": [ "Jean-Yves Charbonnel" ], "categories": [ "math.RT", "math.AG" ], "abstract": "For a reductive Lie algbera over an algbraically closed field of charasteristic zero,we consider a borel subgroup $B$ of its adjoint group, a Cartan subalgebra contained inthe Lie algebra of $B$ and the closure $X$ of its orbit under $B$ in the Grassmannian.The variety $X$ plays an important role in the study of the commuting variety. In thisnote, we prove that $X$ is Gorenstein with rational singularities.", "revisions": [ { "version": "v1", "updated": "2015-07-20T08:58:58.000Z" } ], "analyses": { "keywords": [ "reductive lie algebra", "commuting variety", "cartan subalgebra contained inthe lie", "subalgebra contained inthe lie algebra", "reductive lie algbera" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2015arXiv150705419C" } } }