期刊
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS
卷 362, 期 1, 页码 17-33出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmaa.2009.08.014
关键词
Local fractional derivative; Necessary condition; Structure theorem; Alternative definitions; Numerical approximation
资金
- China NSF [40771094]
- UK EPSRC
- Wales Institute for Mathematical and Computing Sciences
We present the necessary conditions for the existence of the Kolwankar-Gangal local fractional derivatives (KG-LFD) and introduce more general but weaker notions of LFDs by using limits of certain integral averages of the difference-quotient. By applying classical results due to Stein and Zygmund (1965) [16] we show that the KG-LFD is almost everywhere zero in any given intervals. We generalize some of our results to higher dimensional cases and use integral approximation formulas obtained to design numerical schemes for detecting fractional dimensional edges in signal processing. (C) 2009 Elsevier Inc. All rights reserved.
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