arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.05209math.FA
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并矢分布空间

The spaces of dyadic distributions

Vladimir Protasov, Mikhail Karapetyants

摘要:

本文研究了用于函数逼近和曲线生成的细分方法。在经典的情况下,对于定义在实直线上的函数,细分格式的理论由于在构造性逼近论、信号处理以及生成分形曲线和曲面中的广泛应用而广为人知。定义并研究了具有标准勒贝格测度和二进制加法运算的并元半直线(即正半直线)上的细分方案,其中Walsh函数起指数的作用.利用矩阵的谱性质和相应的加细方程解的光滑性证明了细分格式收敛的充要条件。研究了非负系数细分格式的收敛性问题。得到了四系数细分格式的显式收敛准则。作为辅助结果,定义了并矢半直线上的分形曲线,并证明了它们的光滑性公式。本文包含各种插图和数值结果。

英文摘要:

In this paper subdivision schemes, which are used for functions approximation and curves generation, are considered. In classical case, for the functions defined on the real line, the theory of subdivision schemes is widely known due to multiple applications in constructive approximation theory, signal processing as well as for generating fractal curves and surfaces. Subdivision schemes on a dyadic half-line, which is the positive half-line, equipped with the standard Lebesgue measure and the digitwise binary addition operation, where the Walsh functions play the role of exponents, are defined and studied. Necessary and sufficient convergence conditions of the subdivision schemes in terms of spectral properties of matrices and in terms of the smoothness of the solution of the corresponding refinement equation are proved. The problem of the convergence of subdivision schemes with non-negative coefficients is also investigated. Explicit convergence criterion of the subdivision schemes with four coefficients is obtained. As an auxiliary result fractal curves on a dyadic half-line are defined and the formula of their smoothness is proved. The paper contains various illustrations and numerical results.

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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