发表机构
LIMS; HSE(离散数学与统计实验室; 高等经济大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文研究代数曲面投影的Whitney型奇点稳定性,通过分析判别式奇点轨迹和Vandermonde/Schur矩阵退化,在温和组合条件下枚举所有稳定的多奇点类型。
AI 中文摘要
我们描述了$A\subset\mathbb Z$的$A$-判别式奇点轨迹的横截奇点类型,并推导出一个关于由给定牛顿多面体$N$的一般多项式方程定义的曲面坐标投影的Whitney型定理:在$N$的温和组合条件下,所有多奇点都是稳定的(折叠、尖点和双折叠)。然后我们根据$N$枚举这些多奇点。结果依赖于相关Vandermonde/Schur型矩阵的退化分析,这可能具有独立的意义。
英文摘要
We describe transversal singularity types of the singular locus of the $A$-discriminant for $A\subset\mathbb Z$, and deduce a Whitney type theorem for a coordinate projection of a surface defined by a general polynomial equation with a given Newton polytope $N$: under mild combinaorial conditions on $N$, all multisingularities are stable (folds, cusps, and double folds). We then enumerate the multisingularities in terms of $N$. The results rely on the analysis of degeneracy of relevant Vandermonde/Schur type matrices, which may be of independent interest.
Comments40 pages, 2 figures, v2 removed a TeX issue