arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.02544math.AGmath.MG
收藏

实解析芽的局部贝蒂数的多项式界

Polynomial Bound on the Local Betti Numbers of a Real Analytic Germ

Lionel Alberti

摘要:

利用实解析芽的重数的多项式函数证明了实解析芽的局部贝蒂数和的有界性。这个结果可以解释为经典的Oleinik-Petrovsky界(也称为Oleinik-Milnor界)在半代数集的贝蒂数和上的局部化。证明依赖于几何和代数参数之间的相互作用,其关键元素是芽的切锥,Mather拓扑平凡化定理,Oleinik-Petrovsky界,以及D. Mumford和J. Heintz用一个多项式函数来界定一个理想的生成元的次数,这个多项式函数是它的相关变种的几何次数。我们的结果,然后应用到产量的界限上的不变量从奇点理论,如Lipschitz-Killing曲率不变量和Vitushkin变化(其中包括局部密度的胚芽)。

英文摘要:

This article proves the existence of a bound on the sum of local Betti numbers of a real analytic germ by a polynomial function of its multiplicity. This result can be interpreted as a localization of the classical Oleinik-Petrovsky bound (also known as Thom-Milnor bound) on the sum of Betti numbers of a semi-algebraic set. The proof relies on an interplay between geometric and algebraic arguments whose key elements are the tangent cone of the germ, the Thom-Mather topological trivialization theorem, the Oleinik-Petrovsky bound, and a result by D. Mumford and J. Heintz bounding the degrees of the generators of an ideal by a polynomial function of the geometric degree of its associated variety. Our result is then applied to yield bounds on invariants from singularity theory, such as the Lipschitz-Killing curvature invariants and the Vitushkin variations (which include the local density of a germ).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑