05/02/2007 | E.Berezansky Ben-Gurion University, Israel | Nonoscillation and stability for delay differential equantions. |

22/01/2007 | E. Barsky Ariel University, Israel | Mathematical Models of Cascade Separation Processes. Abstract: A mathematical model presented in this paper describes the separation of pourable materials into two components. We prove that there is a quantitative convergence of each grain-size class at every stage of separation and obtain a calculation formula for finding the degree of fractional extraction for each narrow class. Further we consider the gravitational separation process as an absorbing Markov chain. Separation processes are important for protecting the environment from fine dust. A solution to this problem lies in the removal of fine particles from the raw material, which can then be transported or processed further without causing atmospheric pollution. |

08/01/2007 | Prof. Yakar Kannai Weizmann Instutute of Science, Rehovot | Explicit Fundamental Solutions, Analytic Continuation, and Special FunctionsAbstract:A well-known method for obtaining fundamental solutions for hyperbolic equations is to analytically continue expressions known for the elliptic case. Another approach uses transforms. We apply both methods to get explicit fundamental solutions for various degenerate second order wave operators from corresponding degenerate elliptic ones. Various classical special functions appear, and relationships between them are discovered when one solves the equations in more than one way.This is joint work with R. Beals. |

13/11/2006 | Prof. G. Belitski Ben-Gurion University, Israel | Systems of linear differential equations on the line in the space of C-infinity functions ( with I.Lerman) |