COMMUNICATIONS IN ALGEBRA
Volume 29, Number 8, 2001
CONTENTS
On Clifford's Theorem for Vector Bundles on Algebraic Curves . . . 3223 E. Ballico and P. E. Newstead
On the Spread of the Sporadic Simple Groups . . . 3239 S. Ganief and J . Maori
Subdirectly Irreducible Left Self Distributively Generated
Algebras . . . 3257 G. F. Birkenmeier, H. E. Heatherly, and J. A. Lev/alien
Divisible Envelopes over Gorenstein Rings of Krull Dimension
at Most One . . . 3275 E. E. Enochs, H.-S. Kim, and S.-H. Rim
S-Torsion Free Covers of Modules . . . 3285 H.-S. Kim, Y. S. Park, and Y.-M. Song
^-Modules, Tilting, and Almost Abelian Categories. . . . 3293 W. Rump-
On Resultant Criteria and Formulas for the Inversion of a
Polynomial M a p . . . 3327 S. Hachaichi-Mesnager
On the Existence of Flat Covers in R-gr . . . 3341 .7. R. Garcia Rozas, J . A. Lopez Ramos, and B. Torrecillas
Symmetric Group Actions on Tensor Products of Hopf
Algebroids . . . 3351 S. Whitehouse
Root-Graded Lie Algebras with Compatible Grading. . . . 3365 Y. Yoshii
Free Solvable P-Algebras. . . . 3393 S. Chakrabarti
Quasitriangular Structures for a Class of Pointed Hopf
Algebras Constructed by Ore Extensions . . . 3419 A. Nenciu
vi CONTENTS Freeness of the Symbolic Conormal Module and Maps of
Divisor C l a s s e s . . . 3433 P. Griffith and D. A. Smith
Flabby Envelopes of Sheaves . . . 3449 E. Enochs and L. Oyonarte
Algebraic Moduli of Real Elliptic C u r v e s . . . 3459 J . Huisman
On Ordered Completely Simple Semigroups. . . . 3477 T. S. Biyth and G. A. Pinto
Quintessential Primes and Ideal Topologies over a Module . . . 3595 R. Naghipour
A-Invariant Ideals of Crossed Products . . . 3507 S. V. Mihovski
Identities for Algebras Obtained from the Cayley-Dickson
Process . . . 3523 M. Bremner and I. Hentzel
Sur Les Invariants de B^ Sous Faction de Sous-Groupes Finis d'Automorphismes: Conjecture de Gelfand-Kirillov -
et Homologie de H o o h s c h i l d . . . 3535 0. Fleury-Barka
On Twin-Triangular Additive Group Actions on C4 . . . 3559 K. D. Jorgenson
On the Normality of Monomial Ideals of Mixed Products . . . 3571 G. Restuccia and R. H. Villarreal
Quasi-hereditary Algebras Associated with Upper Triangular
Bimodules . . . 3581 B. Deng ;
Lattices of Radicals of Near-Rings . . . 3593 G. F. Birkenmeier, G. L. Booth, and N. J . Groenewald
Vector Bundles on Projective Spaces over a Discrete
Valuation R i n g . . . 3605 E. Ballico
Sylow Intersections, Double Cosets, and 2 - B l o c k s . . . 3609 J . Murray
CONTENTS vii Intersection Cohomology and Lie Algebra Homology . . . 3621 S. Ilangovan
a-Limits of A l g e b r a s . . . 3635 A. Laradji
Covering and Generating the Alternating Group by Conjugate
Elements . . . 3641 D. M. Rodgers
Generalizations of Fitting's Lemma in Arbitrary Associative
Rings. . . . 3647 M. P. Drazin
Corrigendum and Addendum. . . . 3677
