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On Lambe's infinite integral formula

Published online by Cambridge University Press:  20 January 2009

A. Erdélyi
Affiliation:
The Mathematical Institute, 16 Chambers Street, Edinburgh, 1.
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In a recent paper (these Proceedings (2), 6 (1939), 75–8), C. G. Lambe established, and gave some applications of, the formula

in which Ds is the symbol for the derivative of fractional order s. Lambe's proof of (1) is not quite rigorous and it does not bring out the conditions which have to be imposed upon f(x) in order to make (1) true. Furthermore this proof does not give any evidence as to the definition of fractional derivative which is to be used in connection with (1).

Type
Research Article
Copyright
Copyright © Edinburgh Mathematical Society 1940