报告题目：Measuring the non-Gorenstein locus of Hibi rings and normal affine semigroup rings


报告人：Jürgen Herzog  德国杜伊斯堡-埃森大学教授


报告时间：2019年10月14日（周一）下午16：00-17：00


报告地点：数学楼307报告厅


报告摘要: The trace of the canonical module of a Cohen-Macaulay ringdescribes its non-Gorenstein locus. We study the trace of the canonical module of a Segre product of algebras, and we apply our results to compute the non-Gorenstein locus of toric rings. We provide several sufficient and necessary conditions for Hibi rings and normal semigroup rings to be Gorenstein on the punctured spectrum.




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