Includes bibliographical references.

On countably Sigma S modules ; Moduli spaces of graded representations of finite dimensional algebras ; An essential extension with nonisomorphic ring structures ; Supplemented principal ideals ; Some properties of rings reflected in infinite matrix rings ; Slender monoids ; Multivariable public key cryptosystems ; Repeatedroot constacyclic codes of length ^s over Bbb Z_2^a ; Contravariant finiteness and pure semisimple rings ; A characterization of additive categories with the KrullSchmidt property ; A DixmierMoeglin equivalence for Poisson algebras with torus actions ; Pureinjectivity in the category of flat modules ; Eigenvalues, multiplicities and graphs ; Closure of matrix classes under Schur complementation, including singularities ; Sums of alternating matrices and invertible matrices ; Internal exchange rings ; Representation of sigma omplete MValgebras and their associated Dedekind sigma omplete roups ; Noncommutative linear algebra ; The moduli space of threedimensional Lie algebras ; Questions related to Koethe's nil ideal problem ; Bounds on the pseudoweight of minimal pseudocodewords of projective geometry codes ; On Galois extensions with automorphism group as Galois group ; A * itoff theorem for associative pairs ; Open Problems Adel N Alahmadi Husain S AlHazmi and Pedro A Guil Asensio ; E Babson B HuisgenZimmermann and R Thomas ; Gary F Birkenmeier Jae Keol Park and S Tariq Rizvi ; Victor Camillo and Sharon Lima ; Victor Camillo and Juan Jacobo Simon ; Radoslav M Dimitric ; Jintai Ding and Dieter Schmidt ; Hai Q Dinh ; Nguyen Viet Dung ; Alberto Facchini ; K R Goodearl ; Pedro A Guil Asensio and Ivo Herzog ; Charles R Johnson Antonio Leal Duarte Carlos M Saiago and David Sher ; Charles R Johnson and Ronald L Smith ; T Y Lam and R G Swan ; Saad H Mohamed ; Daniele Mundici ; Barbara L Osofsky ; Carolyn Otto and Michael Penkava ; Edmund R Puczyowski ; Roxana Smarandache and Marcel Wauer ; George Szeto and Lianyong Xue ; Maribel Tocon