Abstract
In this paper we characterize the class Ck of functions f on (0,∞) for which f(x), . . ., (xkf(x))(k) are completely monotonic for given k. In the limit we obtain the well-known characterization of the class of Stieltjes functions as those functions f defined on the positive half line for which (xkf(x))(k) is completely monotonic on (0,∞) for all k ≥ 0.
Original language | English |
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Journal | Mediterranean Journal of Mathematics |
Volume | 8 |
Issue number | 1 |
Pages (from-to) | 113-122 |
Number of pages | 10 |
ISSN | 1660-5446 |
DOIs | |
Publication status | Published - Mar 2011 |