WITHDRAWN: Natural time analysis

Abstract This chapter deals with a novel methodology for the analysis of fractal time series and point processes known as Natural Time Analysis. It was introduced in 2001 by a group of Greek scientists leaded by P. Varotsos. Currently natural time analysis is being widely applied to the study of signals originated from complex systems. The method has also been applied successfully to the analysis of data sets of seismic processes from many regions of the world. In particular, natural time analysis has been found to be consistent with the methods of detrended fluctuation analysis and multifractal characterization, among others.