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On a non-Markovian queueing problem under a control operating policy and start-up times

Arun Borthakur, Ruby Gohain (1982)

Aplikace matematiky

A non-Markovian queueing system with Poisson input is studied under a modified operating rule called “control operating policy” in which the server begins “start-up” only when the queue length reaches a fixed number n ( 1 ) . By using the supplementary variable technique, the distribution of the queue length (excluding those being served) in the form of a generating function is obtained. As a special case, a Markovian queueing system with exponential start-up is discussed in detail to analyse the economic...

On a problem by Schweizer and Sklar

Fabrizio Durante (2012)

Kybernetika

We give a representation of the class of all n -dimensional copulas such that, for a fixed m , 2 m < n , all their m -dimensional margins are equal to the independence copula. Such an investigation originated from an open problem posed by Schweizer and Sklar.

On a two-variable zeta function for number fields

Jeffrey C. Lagarias, Eric Rains (2003)

Annales de l’institut Fourier

This paper studies a two-variable zeta function Z K ( w , s ) attached to an algebraic number field K , introduced by van der Geer and Schoof, which is based on an analogue of the Riemann-Roch theorem for number fields using Arakelov divisors. When w = 1 this function becomes the completed Dedekind zeta function ζ ^ K ( s ) of the field K . The function is a meromorphic function of two complex variables with polar divisor s ( w - s ) , and it satisfies the functional equation Z K ( w , s ) = Z K ( w , w - s ) . We consider the special case K = , where for w = 1 this function...

On an inequality and the related characterization of the gamma distribution

Maia Koicheva (1993)

Applications of Mathematics

In this paper we derive conditions upon the nonnegative random variable under which the inequality D g ( ξ ) c E g ' ξ 2 ξ holds for a fixed nonnegative constant c and for any absolutely continuous function g . Taking into account the characterization of a Gamma distribution we consider the functional U ξ = sup g D g ξ E g ' ξ 2 ξ and establishing some of its properties we show that U ξ 1 and that U ξ = 1 iff the random variable ξ has a Gamma distribution.

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