A Note About the Ki(z) Functions
Abstract
In the article [Petojevic 2006], A. Petojevi\' c verified useful properties of the Ki(z) functions which generalize Kurepa's [Kurepa 1971] left factorial function. In this note, we present simplified proofs of two of these results and we answer the open question stated in [Petojevic 2006]. Finally, we discuss the differential transcendency of the Ki(z) functions.
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