### Volume 7, 1994

## XII Escola de Álgebra - Part II

Diamantina, August 1992 - Minas Gerais

edited by Dan Avritzer, Michel Spira

## Contents

C. Peskine,
Hilbert Polynomials of Smooth Sufaces in P^4.
Comments

N. R. Rocco,
A Crossed Embedding of Groups and the Computation
of Certain Invariants of Finite
Solvable Groups

R. E. Rodríguez,
Riemann Surfaces, Abelian Varieties
and Automorphisms

M. A. Shokrollahi,
An Introduction to the Theory of Bilinear
Complexity

S. N. Sidki,
Solving Certain Group Equations in PGL(2,k).
A Computational Approach

A. Simis,
Algebraic Aspects of Tangent Cones

T. L. Smith,
Galois Groups and Quadratic Forms

F. Torres,
\gamma-Hiperellipticity and Weights of
Weierstrass Points

V. Trevisan,
Polynomial Factorization

N. Vonessen,
Rings with Polynomial Identities. An Elementary
Introduction