Holder Regularity of mu-Similar Functions
Abstract
Given a positive measure mu, d contractions on [0,1] and a function g on a"e, we are interested in function series F that we call "mu-similar functions" associated with mu, g and the contractions. These series F are defined as infinite sums of rescaled and translated copies of the function g, the dilation and translations depending on the choice of the contractions. The class of mu-similar functions F intersects the classes of self-similar and quasi-self-similar functions, but the heterogeneity we introduce in the location of the copies of g make the class much larger. We study the convergence and the global and local regularity properties of the mu-similar functions. We also try to relate the multifractal properties of mu to those of F and to develop a multifractal formalism (based on oscillation methods) associated with F.