Song, Renming; Vondracek, Zoran - In: Statistics & Probability Letters 76 (2006) 14, pp. 1522-1528
Let [psi] be the characteristic exponent of a symmetric Lévy process X. The functionappears in various studies on the local time of X. We study monotonicity properties of the function h. In case when X is a subordinate Brownian motion, we show that is a Bernstein function.