ON GEOMETRIC-STABLE LAWS, A RELATED PROPERTY
OF STABLE PROCESSES, AND STABLE DENSITIES
OF EXPONENT ONE

B. RAMACHANDRAN

Indian Statistical Institute, Delhi Centre, New Delhi-16, India

(Received November 8, 1995; revised May 13, 1996)

Abstract.    Klebanov et al. (1985, Theory Probab. Appl., 29, 791-794) introduced a class of probability laws termed by them ``geometrically-infinitely-divisible'' laws, and studied in detail the sub-class of ``geometrically-strictly-stable'' laws. In Section 2 of the present paper, the larger sub-class of ``geometric-stable'' laws is (defined and) studied. In Section 3, a characterization of stable processes involving (stochastic integrals and) geometric-stable laws is presented. In Section 4, the asymptotic behaviour of stable densities of exponent one (and |beta| < 1) is studied using only real analysis methods. In an Appendix, ``geometric domains of attraction'' to geometric-stable laws are investigated, motivated by the work of Mohan et al. (1993, Sankhyã Ser. A, 55, 171-179).

Key words and phrases:    Stable laws and processes, geometric-stable laws, geometric domains of attraction.

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