Includes bibliographical references.

On countably $\Sigma $-CS modules / Adel N. Alahmadi, Husain S. Al-Hazmi and Pedro A. Guil Asensio -- Moduli spaces of graded representations of finite dimensional algebras / E. Babson, B. Huisgen-Zimmermann and R. Thomas -- An essential extension with nonisomorphic ring structures / Gary F. Birkenmeier, Jae Keol Park and S. Tariq Rizvi -- Supplemented principal ideals / Victor Camillo and Sharon Lima -- Some properties of rings reflected in infinite matrix rings / Victor Camillo and Juan Jacobo Sim�on -- Slender monoids / Radoslav M. Dimitri�c -- Multivariable public key cryptosystems / Jintai Ding and Dieter Schmidt -- Repeated-root constacyclic codes of length $2^s$ over $\Bbb Z_{2^a}$ / Hai Q. Dinh -- Contravariant finiteness and pure semisimple rings / Nguyen Viet Dung -- A characterization of additive categories with the Krull-Schmidt property / Alberto Facchini -- A Dixmier-Moeglin equivalence for Poisson algebras with torus actions / K. R. Goodearl -- Pure-injectivity in the category of flat modules / Pedro A. Guil Asensio and Ivo Herzog -- Eigenvalues, multiplicities and graphs / Charles R. Johnson, Ant�onio Leal Duarte, Carlos M. Saiago and David Sher -- Closure of matrix classes under Schur complementation, including singularities / Charles R. Johnson and Ronald L. Smith -- Sums of alternating matrices and invertible matrices / T. Y. Lam and R. G. Swan -- Internal exchange rings / Saad H. Mohamed -- Representation of $\sigma $-complete MV-algebras and their associated Dedekind $\sigma $-complete $l$-groups / Daniele Mundici -- Noncommutative linear algebra / Barbara L. Osofsky -- The moduli space of three-dimensional Lie algebras / Carolyn Otto and Michael Penkava -- Questions related to Koethe's nil ideal problem / Edmund R. Puczy�owski -- Bounds on the pseudo-weight of minimal pseudo-codewords of projective geometry codes / Roxana Smarandache and Marcel Wauer -- On Galois extensions with automorphism group as Galois group / George Szeto and Lianyong Xue -- A $^*$-Litoff theorem for associative pairs / Maribel Toc�on --

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Electronic reproduction. Providence, Rhode Island : American Mathematical Society. 2012

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