Abstract
The class of order 3 phase type distributions (PH(3)) is known to be a proper subset of the class of order 3 matrix exponential distributions (ME(3)). In this paper we investigate the relation of these two sets for what concerns their moment bounds. To this end we developed a procedure to check if a matrix exponential function of order 3 defines a ME(3) distribution or not. This procedure is based on the time domain analysis of the density function. The proposed procedure requires the numerical solution of a transcendent equation in some cases.
The presented moment bounds are based on some unproved conjectures which are verified only by numerical investigations.
This work is partially supported by the NAPA-WINE FP7 project and by the OTKA K61709 grant.
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Horváth, A., Rácz, S., Telek, M. (2009). Moments Characterization of Order 3 Matrix Exponential Distributions. In: Al-Begain, K., Fiems, D., Horváth, G. (eds) Analytical and Stochastic Modeling Techniques and Applications. ASMTA 2009. Lecture Notes in Computer Science, vol 5513. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-02205-0_13
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DOI: https://doi.org/10.1007/978-3-642-02205-0_13
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