COMMUNICATIONS IN ALGEBRA Volume 29, Number 6,2001
CONTENTS
Some Results of Regularity for Severi Varieties of Projective
Surfaces . . . 2297 F. Flamini
Overgroups of Symplectic Group in Linear Group over
Local R i n g s . . . 2313 H. You and B. Zheng
The Special Algebras of Cartan Type in Characteristic 0 . . . 2319
W. Jeon
Cofinite M o d u l e s . . . 2333
S. Yassemi
On Generalized Orthogroups. . . . 2341 X. M. Ren and K. P. Shum
Jordan Canonical Form of a Partitioned Complex Matrix and
Its Application to Real Quaternion Matrices . . . 2363
F. Zhang 'and Y. Wei
A New Generalization of the Center of a Near-Ring with
Applications to Polynomial Near-Rings . . . 2377 M. Farag
Modules Whose Maximal Submodules Have Supplements . . . 2389 R. Aliwde, G. Bilhan, and P. F. Smith
-On X-Extending and X-Continuous Modules . . . 2407 Z. Liu
w-Dimension of Domains. II . . . 2419 F. Wang
Weakly Continuous and C2-Rings . . . 2429 W. K. Nicholson and M. F. Yousif
Perfect rpp Semigroups . . . 2447 X. J. Guo, K. P. Shum, and Y. Q. Guo
vi CONTENTS On the Structure of Regular Crypto Semigroups . . . 2461 X. Z. Kong and K. P. Shum
The Nichols Zoeller Theorem for Hopf Algebras in the
Category ofYetter Drinfeld Modules . . . 2481 B. Scharfschwerdt
The Regularity Degree and Epimorphisms in the Category of
Commutative R i n g s . . . 2489 W. D. Burgess and R. Raphael
Finite Dimensional Nilpotent Lie Algebras with Isomorphic
Maximal Subalgebras . . . 2501 K. Holrnes and E. Stitzinger
Morphisms of Double Frobenius Algebras. I I . . . 2523 M. Koppinen
On a Dade's C o n j e c t u r e . . . 2541 C. Nastasescu and L. Daus
Three Notes on Nice Extension Domains . . . 2553 L. J. Ratliff, Jr.
Stacked Bases for Homogeneous Completely Decomposable
Groups . . . .~. . . . . 2575 L. Saice and L. Striin^mann
Extensions of Clean Rings . . . 2589 J. Han and W. K. Nicholson
Multiplication Modules . . . 2597 S. Singh and Y. Al-Shaniafi
Embedding Modules in Graded Modules over a Semigroup-
Graded R i n g . . . 2611 G. Abrams and C. Menini
Pentagon Equation and Matrix B i a l g e b r a s . . . 2627 A. A. Davydov
Pi Incidence Algebras and Capelli Polynomials . . . 2651
E. Spiegel
On Nonabelian Tensor Product Modulo q of Groups . . . 2657
N. Inassaridz.e
Groups of Type E^ over Arbitrary Fields . . . 2689 R. S. Garibaldi
CONTENTS vii On Filtrations Having Small Analytic Deviation . . . 2711 K. Nishida
Uniform Filters and Semi-compatibility . . . 2731 M. Garcia Roman and A. Verschoren
