Includes bibliographical references.

Limit theorems for some hypergroup structures on mathbf R^n\times [0,\infty ) ; Nuclear spaces of test functions connected with hypercomplex systems and representations of such systems ; Hypercomplex systems and hypergroups: connections and distinctions ; The HardyLittlewood maximal function for ChebliTrimeche hypergroups ; SturmLiouville hypergroups ; Continuous ariable polynomial hypergroups ; A survey of Fourier algebras ; Expansion in series of Laguerre functions for solution of perturbed Laguerre equations ; Asymptotic behaviour of the paths of random walks on some commutative hypergroups ; Bounded measures algebras: a fixed point approach ; Progress in the theory of probability on hypergroups ; Discrete hypergroups associated with compact quantum Gelfand pairs ; Transmutation operators and the inverse spectral problem ; Limit theorems for the spin process ; Differential operators with matrix coefficients and transmutations ; Generalized product formula for orthogonal polynomials ; An infinitesimal algebra of the hypergroup generated by double cosets and nonlinear differential equations ; Convolution algebras which are not necessarily positivitypreserving ; Signed hypergroups a survey ; On the relation between subfactors and hypergroups ; Connection coefficients of orthogonal polynomials with applications to classical orthogonal polynomials ; Generalized transmutation and translation operators associated with partial differential operators ; Gelfand pairs of quantum groups, hypergroups and pecial functions ; Central limit theorems for Jacobi hypergroups ; Finite commutative hypergroups and applications from group theory to conformal field theory ; Kolmogorov's three series theorem on onedimensional hypergroups N Ben Salem and M N Lazhari ; Yu M Berezansky ; Yu M Berezansky and A A Kalyuzhnyi ; Walter R Bloom and Zeng Fu Xu ; H Chebli ; William C Connett and Alan L Schwartz ; Pierre Eymard ; A Fitouhi and M M Hamza ; Leonard Gallardo ; MarcOlivier Gebuhrer ; Herbert Heyer ; Tom H Koornwinder ; B M Levitan ; Mohammed Mabrouki ; N H Mahmoud ; B P Osilenker ; G B Podkolzin ; Margit Rosler ; Kenneth A Ross ; V S Sunder ; Ryszard Szwarc ; K Trimeche ; Leonid Vainerman ; Michael Voit ; N J Wildberger ; Hansmartin Zeuner