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arXiv 0705.1095math.CVmath.CA
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凸体的Monge-Ampère测度与Bernstein-Markov型不等式

Monge-Ampère Measures for Convex Bodies and Bernstein-Markov Type Inequalities

D. Burns, N. Levenberg, S. Ma'u, Sz. Révész

摘要:

本文用几何方法计算了复Monge-Ampère测度$(dd^cV_K)^n$的一个公式,其中$K \Subset \RR^n \subset \CC^n$是凸体,$V_K$是它的Siciak-Zaharjuta极值函数.贝德福德和泰勒已经计算了对称凸体$K$。我们应用这一点,以表明,两种方法推导Bernstein-Markov型不等式,即,多项式梯度的逐点估计对所有凸体产生相同的结果。一个关键的作用是由几何结果,极值内切椭圆出现在逼近论中的最大面积椭圆确定复杂的蒙赫-安培解决方案$V_K$。

英文摘要:

We use geometric methods to calculate a formula for the complex Monge-Ampère measure $(dd^cV_K)^n$, for $K \Subset \RR^n \subset \CC^n$ a convex body and $V_K$ its Siciak-Zaharjuta extremal function. Bedford and Taylor had computed this for symmetric convex bodies $K$. We apply this to show that two methods for deriving Bernstein-Markov-type inequalities, i.e., pointwise estimates of gradients of polynomials, yield the same results for all convex bodies. A key role is played by the geometric result that the extremal inscribed ellipses appearing in approximation theory are the maximal area ellipses determining the complex Monge-Ampère solution $V_K$.

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。

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