Includes bibliographical references.

A double complex for computing the signcohomology of the universal ordinary distribution ; Downup algebras and Witten's deformations of the universal enveloping algebra of mathfrak sl_2 ; Localizations of Grothendieck groups and Galois structure ; Invariant stable bundles over modular curves (p) ; Okubo algebras and twisted polynomials ; Some new results on modular forms for rm GL(2,\bf F_q[T]) ; Counting jump optimal linear extensions of some posets ; The irreducible representations of categories ; Prounipotent prolongation of algebraic groups ; Graded simple Jordan algebras and superalgebras ; The centralizer algebra of the Lie superalgebra mathfrak p(n) and the decomposition of ^\otimes k as a mathfrak p(n) odule ; DrinfeldAnderson motives and multicomponent KP hierarchy ; Weil classes and Rosati involutions on complex abelian varieties ; On some open problems related to the restricted Burnside problem Greg W Anderson ; Georgia Benkart ; Ted Chinburg Boas Erez Georgios Pappas and Martin Taylor ; Igor V Dolgachev ; Alberto Elduque ; ErnstUlrich Gekeler ; Hyung Chan Jung ; Masashi Kosuda ; Andy R Magid ; Consuelo Martinez ; Dongho Moon ; Igor Yu Potemine ; Yu G Zarhin and B J J Moonen ; Efim Zelmanov