COMMUNICATIONS IN ALGEBRA Volume 27, Number 12,1999
CONTENTS
Extended Centroid and Central Closure of the Multiplication
A l g e b r a . . . 5723 M. Cabrera and A. A. Mohammed
On Semiregular Infinite Matrix Rings... 5737 F. J. Costa-Cano andJ. J. Simon
Quotients of Maximal Class of Thin Lie Algebras. The Odd
Characteristic Case... 5741 A. Caranti and G. Jurman
Quotients of Maximal Class of Thin Lie Algebras. The Case
of Characteristic Two... 5749 G. Jurman
On a Generalization of the Auslander-Bridger Transpose ... 5791 Z. Huang
On Integral Domains with No Atoms . . . 5813 J. Coykendall, D. E. Dobbs, and B. Mullins
Yang-Baxter Operators Arising from (Co)algebra Structures ... 5833 5. Dascalescu and F. Nichita
On Formally Real Modules ... 5847 G. Zeng
The Occurrence Problem for Free Metanilpotent Lie Algebras ... 5857 C. K. Gupta and U. U. Umirbaev
Quasitriangular Bicrossed Coproducts in Braided Monoidal
Categories . . . 5877 H.-X. Chen
Finitely Presented and Coherent Ordered Modules and Rings... 5893 F. Wehrung
Induced Modules over Group Algebras ofMetabelian Groups
of Finite R a n k . . . 5921 A. V. Tushev
vii
viii CONTENTS Asymptotic Behavior of Integral Closures of Ideals ... 5939 A. K. Kingsbury and R. Y. Sharp
Loewy Series, ^-Modules, and Trace Ideals... 5951 J. F. Waiters
A Note on the Cohen-Macaulayness of Multi-Rees Rings... 5967 Z. Tang
Derivations on Multilinear Polynomials in Semiprime Rings... 5975 V. De Filippis and 0. M. Di Vincenzo
Signed Brauer's Algebras as Centralizer Algebras... 5985 M. Parvathi and C. Selvaraj
Ducci Sequences over Abelian G r o u p s . . . 5999 F. Breuer
On Semiperfect Associative Pairs ... 6015 M. A. Fortes Escalona, I. de las Penas Cabrera, and
E. Sdnchez Campos
Graded Coalgebras, Smash Coproduct, and a Morita-Takeuchi
C o n t e x t . . . 6039 C. Boboc
Null Ideals and Spanning Ranks of Matrices. I I . . . 6051 W. C. Brown
Involutive Invariants of the Second Kind ... 6069 M. V. Reyes Sanchez, A. Smet, and A. Verschoren
Quantum Traces and Quantum Dimensions for Quasi-Hopf
Algebras... 6103 D. Bulacu, F. Panaite, and F. Van Oystaeyen
The Module of Derivations of Regular Local Rings ... 6123 A. K. Maloo
Outer Inheritance in Jordan Algebras... 6127 K. McCrimmon
About the Quotient Fields of Formal Power Series Domains... 6147 A. Benhissi
On Certain Classes of Curve Singularities with Reduced
Tangent Cone ... 6159 A. De Paris
CONTENTS ix An Application of the Cotangent Complex to Regularity and
Complete I n t e r s e c t i o n . . . 6167 M. J. Vale
Systemes Recursifs et Algebre de Hadamard de Suites
Recurrentes Lineaires sur des Anneaux C o m m u t a t i f s . . . 6175 A. Necer
On the Associated Primes of Local Cohomology Modules ... 6191 K. Khashyarmanesh and Sh. Salarian
Good Congruences on a Type a Semigroup . . . 6199 Y. Luo and X. Guo
Multiplication Rings and Graded Rings . . . 6213 J . Escoriza and B. Torrecillas
Central Units of Integral Group R i n g s . . . 6233 C. Polcino Milies and S. K. Sehgal
Lifting Trees of Prime Ideals to Bezout Extension Domains... 6243 D. E. Dobbs and M. Fontana
Crossed Extensions of Leibniz Algebras ... 6253 J. M. Casas
Exterior Power Operations in the Representation Theory of the
Classical Weyl Groups . . . 6273 J. M. Bryden
E r r a t a . . . 6297 Index to Volume 27 ... 6301
