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Published online by Cambridge University Press: 20 November 2018
The identity of Abel [1] [2] we deal with here can be stated in thefollowing form: If n is a positive integer,
.
(In order that all terms be defined we require a ≠ 0, b ≠ n.)
This identity and deductions from it have been very useful in many problems,for instance in mathematical statistics [3]. Usually this identity isestablished by means of the Lagrange - Bűrman theorem [4]. Here we willderive it very simply.