Finite sums of ridge functions on convex subsets of R^n

Seminar
Speaker
Dr. A. Kuleshov, Moscow State University, Russia
Date
03/12/2018 - 15:10 - 14:00Add to Calendar 2018-12-03 14:00:00 2018-12-03 15:10:00 Finite sums of ridge functions on convex subsets of R^n We prove that each function of one variable forming a continuous finite sum of ridge functions on a convex body belongs to the VMO space on every compact interval of its domain. Also, we prove that for the existence of finite limits of the functions of one variable forming the sum at the  corresponding boundary points of their domains, it suffices to assume the Dini condition on the  modulus of continuity of some continuous sum of ridge functions on a convex body E at some boundary point. Further, we prove that the obtained (Dini) condition is sharp. 2nd floor Colloquium Room, Building 216 אוניברסיטת בר-אילן - Department of Mathematics mathoffice@math.biu.ac.il Asia/Jerusalem public
Place
2nd floor Colloquium Room, Building 216
Abstract

We prove that each function of one variable forming a continuous finite sum of ridge functions

on a convex body belongs to the VMO space on every compact interval of its domain. Also, we prove that for the existence of finite limits of the functions of one variable forming the sum at the 

corresponding boundary points of their domains, it suffices to assume the Dini condition on the 

modulus of continuity of some continuous sum of ridge functions on a convex body E at some boundary point. Further, we prove that the obtained (Dini) condition is sharp.

Last Updated Date : 03/12/2018