The 1Wednesdays Brazilian Mathematics Colloquium took place in Poços de Caldas, Minas Gerais, from July 1Wednesdays to 2Mondays, 1983. The coordinator was Professor Djalma Galvão Carneiro Pessoa. The Colloquium had 525 participants, including representatives from 16 Brazilian states and some foreign countries.

Special sessions

Special Algebra Session

Conferences:

Groups Acting on Trees Said Sidki, UnB
Modules on Polynomial Rings Yves Lequain, IMPA
Groups of Divisor Classes in Graded Algebras Aron Simis, UFPE
Curves and their Jacobeans Allan Altman, Univ. Simon Bolivar

Survey:

Recent Results on Fermat's Last Theorem Paulo Ribenboim, Queen's University, Canada

Special Analysis Session

Conferences:

Germs of Analytic Functions Roberto Soraggi, UFRJ
On a Non Well Posed Abstract Evolution Systems Pedro Humberto Rivera, UFRJ
Supersymmetry and Two-Dimensional Reduction Abel Klein, Univ. California-Irvine
Trace Class Operators Peter Rejto, University of Minnesota
Markov Operators with Very Small Spectrum Laura Martignon, UnB
Spectrum of a Quantum Hamiltonian and Classical Mechanics Fernando Cardoso, UFPE
Nonlinear Equations and Wave Propagation Geraldo Ávila, UnB

Special Geometry Session

Conferences:

Evolution Equations Describing Pseudo-Spherical Surfaces Keti Tenenblat, UnB
Classical Harmonic Analysis and Minimal Surfaces Frederico Xavier, UFPE
On Minimal Surfaces with Constant Gaussian Curvature in a Space Form K. Kenmotsu, Tohoku Univ.
Ruled Minimal Submanifolds in Spaces of Constant Curvature João Lucas Marques Barbosa, UFC
Harmonic Applications between Riemannian Varieties Maria Luiza Soares Leite, UFPE

Survey:

Recent Results in Minimal Surface Theory William Meeks III, IMPA

Special Session on Numerical Analysis and Optimization

Conferences:

Introduction to Continuous-Time Linear Programming Alfredo Iusem, IMPA
Riemann Solutions of the Hyperbolic Equations for Fluid Flows Dan Marchesin, PUC-RJ
A Model for Random Generation of Linear Programs Sancho Berenguer, IMPA
Stability in the Approximation of Partial Differential Equations Paulo Roberto de Oliveira

Survey:

Random Linear Programs and Evaluation of Linear Programming Algorithms Sancho Berenguer, IMPA

Special Topology Session

Conferences:

Surface Isotopy in S 3 Guillermo Fleitas Morales, IMPA
Actions of Finite Groups and a Thurstone Conjecture William Meeks III, IMPA

Special Session on Dynamical Systems

Conferences:

The Chafee and Infante Problem:u t =u xx + lambda f(u) Daniel B. Henry, USP
Genericity and Full Measure Floris Takens, Groningen Univ.
The Order Approach to Rotation Number and a Conjecture about C-analytic Dynamical Systems Dennis Sullivan, IHES/CUNY

Survey:

Dynamics of Interval Transformations Welington Celso de Melo, IMPA
A Relation Between Probability, Geometry and Dynamics – the random paths of the Heat Equation on Riemannian Manifold Dennis Sullivan, IHES/CUNY

Special Statistics Session

Conferences:

Statistics in Industrial Optimization Sebastião Amorim, UNICAMP
A Unified View of Statistical Forecasting Procedures Andrew C. Harvey, London School of Economics
Quasi-Periodic Inspection System for Fault Detection Valter Senna, UFRJ
Generalized Linear Models Gauss Moutinho Cordeiro, UFPE
On Bayesian Robustness in Finite Populations Heleno Bonfarine, USP

Survey:

New Developments in Multivariate Analysis S. James Press, Univ. California-Riverside

Special Session on Computing and Combinatorics

Conferences:

The Ruffle Theory and its Application in 2-3 Trees and B-Trees Nivio Ziviane, UFMG
I/O Complexity and Optimal Device Design for Sorting Siang Wun Song, USP
A Ramsey-Type Theorem with Bounded Jumps Imre Simon, USP
Some Enumeration Problems in Geometry Arnaldo Mandel, USP

Survey:

Factorization Algorithms for Integers and Rational Polynomials Cláudio Lucchesi, UNICAMP

Elementary and Intermediate Level Courses

In addition to the special sessions, the main activities developed during the 1Wednesdays Colloquium were the Elementary and Intermediate Level Courses, 7 Lectures of General Interest (Surveys), and 8 sessions for the presentation of research results, in which 69 papers were presented.

Elementary Courses

Introduction to Mathematical Economics Aloisio Araujo
Statistical Methods in Biology and Medicine José Francisco Soares and Flávio Celso Bartman

Secondary Level Courses

Dynamics of Rational Functions Paulo Sad
Index Theory Daciberg Lima Gonçalves and José Carlos de Souza Kühl
An Introduction to Convex Analysis Flávio Dickstein and Felipe Acker
Meromorphic Functions: Applications of Nevanlina's Theory Mauricio Alves