, Volume 48, Issue 1, pp 49–68

Hölder exponents of irregular signals and local fractional derivatives

  • Kiran M Kolwankar
  • Anil D Gangal
Mathematical Aspects Of Dynamical Systems

DOI: 10.1007/BF02845622

Cite this article as:
Kolwankar, K.M. & Gangal, A.D. Pramana - J Phys (1997) 48: 49. doi:10.1007/BF02845622


It has been recognized recently that fractional calculus is useful for handling scaling structures and processes. We begin this survey by pointing out the relevance of the subject to physical situations. Then the essential definitions and formulae from fractional calculus are summarized and their immediate use in the study of scaling in physical systems is given. This is followed by a brief summary of classical results. The main theme of the review rests on the notion of local fractional derivatives. There is a direct connection between local fractional differentiability properties and the dimensions/local Hölder exponents of nowhere differentiable functions. It is argued that local fractional derivatives provide a powerful tool to analyze the pointwize behaviour of irregular signals and functions.


Fractal multifractal Hölder exponent fractional calculus 


47.53 47.52 02.30 05.40 

Copyright information

© Indian Academy of Sciences 1997

Authors and Affiliations

  • Kiran M Kolwankar
    • 1
  • Anil D Gangal
    • 1
  1. 1.Department of PhysicsUniversity of PunePuneIndia