Estimates for a uniform modulus of continuity of functions from symmetric spaces

摘要

We prove a multidimensional 'correctability' theorem of the Oskolkov type for a function given in Bn whereby a sharp quantitative estimate for the uniform modulus of continuity of a function on 'large' sets is' given if an estimate of the modulus of continuity of this function in a symmetric space is known. We show that ' an estimate of a uniform modulus of continuity depends only on the eigenfunction of the symmetric space.