arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1208.1035cs.ITmath.FAmath.IT
收藏

Rènyi熵功率的计算

The concavity of Rènyi entropy power

Giuseppe Savarè, Giuseppe Toscani

摘要:

我们与p阶Rényi熵的熵功率的定义,这是香农熵功率的自然扩展,并表现出良好的行为沿解的p-非线性热方程$R^n$。我们证明了求解这类方程的一般概率密度的Rényi熵幂总是时间的凹函数,而它对应于Barenblatt源型解具有线性行为。然后我们证明了p阶非线性扩散的概率密度的p阶Rényi熵幂是时间的凹函数。这一结果将Costa的香农熵幂不等式推广到了Rényi熵。

英文摘要:

We associate to the p-th Rényi entropy a definition of entropy power, which is the natural extension of Shannon's entropy power and exhibits a nice behaviour along solutions to the p-nonlinear heat equation in $R^n$. We show that the Rényi entropy power of general probability densities solving such equations is always a concave function of time, whereas it has a linear behaviour in correspondence to the Barenblatt source-type solutions. We then shown that the p-th Rényi entropy power of a probability density which solves the nonlinear diffusion of order p, is a concave function of time. This result extends Costa's concavity inequality for Shannon's entropy power to Rényi entropies.

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。

↑