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4th Meeting in Algebraic Geometry and Commutative Algebra

ALGA 2001

Hotel Portogalo, Angra dos Reis, August 5- 11, 2001  

 

Organizing Committee

  • Arnaldo Garcia (IMPA)
  • Eduardo Esteves (IMPA)
  • Amílcar Pacheco (UFRJ)

 

Speakers

Gerard van der Geer  (Univ. of Amsterdam) – Counting curves over finite fields and Siegel modular forms
Letterio Gatto (Inst.Politecnico di Torino) – Degeneration of special Weierstrass points on stable curves
Rafael Villarreal (IPN, Mexico) – Ehrhart rings and normality
Hajime Kaji (Waseda Univ.)  – On the reflexivity and the Gauss maps of Segre varieties
Alexander Prestel (Univ. of Konstanz) – Representation theorems for real commutative rings
Miriam Abdón (Univ. Fed. Fluminense) – Maximal curves over finite fields
Luisa Doering (Univ. Fed. Rio Grande do Sul) –    Cohomological degrees and Hilbert functions of graded modules
Shreeram Abhyankar  (Purdue Univ.) -Nice equations for nice groups
Marcelo Saia (USP, S.Carlos) – Deformations with constant Milnor number and multiplicity of non-degenerate complex hypersurfaces
Gabor Korchmáros (Univ. degli Studi della Basilicata) – Automorphism groups of maximal curves over finite fields
Francesco Russo (Univ.Fed. Pernambuco) – On varieties with one apparent double point
Marc Chardin (Univ. Paris VI) – Castelnuovo-Mumford regularity and the degrees of “defining equations”
Luciane Quoos (Univ. Fed. Rio de Janeiro) – Curves over Finite Fields with many rational points
Marcelo Escudeiro (Univ. Est. Maringá) – Analytic classification of curve singularities with semigroup <6,9,19>
Wolmer Vasconcelos(Rutgers Univ.) –  Effective normality criteria for algebras of linear type
Antônio Engler (UNICAMP) – Kaplansky’s radical and a recursive description of pro-2 Galois groups
Abramo Hefez (UFF) – On the classification of germs of curves
Lucia Caporaso (M.I.T., USA) – Modular properties of theta characteristics
Dan Avritzer (Univ. Fed. Minas Gerais) – Curves of genus 2 and Desargues configurations
Aron Simis (Univ. Fed. Pernambuco) – On gradient ideals and polar maps
Severino Collier Coutinho (Univ. Fed. Rio de Janeiro) – On the d-simplicity of polynomial rings
Henning Stichtenoth (Univ. Essen) Explicit Construction of Codes beyond the Gilbert-Varshamov Bound
Rosali Brusamarello (Univ. Est. Maringa) – Orthogonal groups containing a given maximal torus
Dan Haran (Tel-Aviv Univ.) – Projective structure and block approximation
Philippe Gimenez (Univ. Valladolid) – On the Castelnuovo-Mumford regularity of projective monomial varieties
Israel Vainsencher (Univ. Fed. Pernambuco) – Genus 2, degree 5
Fernando Torres (UNICAMP) – On the genus of a maximal curve
Herbert Lange (Univ. of Erlangen-Nuremberg) – Abelian varieties with group action

 

Abstracts

Program

Participants

  • Miriam Abdón (UFF, Niterói)
  • Shreeram Abhyankar (Purdue)
  • Carolina Araújo (Princeton)
  • Dan Avritzer (UFMG, Belo Horizonte)
  • Carlos Bahiano (UFBa, Salvador)
  • Valmecir Bayer (UFES, Vitória)
  • Jucelino Bezerra (IMPA, Rio de Janeiro)
  • Paulo Brumatti (UNICAMP, Campinas)
  • Rosali Brusamarello (UEM, Maringá)
  • Lucia Caporaso (MIT/Universitá del Sannio, Italy)
  • Marc Chardin (Jussieu)
  • Severino Collier Coutinho (UFRJ, Rio de Janeiro)
  • Ada Maria Doering (UFRGS, Rio Grande do Sul)
  • Luisa Doering (UFRGS, Rio Grande do Sul)
  • Antônio Engler (UNICAMP, Campinas)
  • Marcelo Escudeiro (UEM, Maringá)
  • Eduardo Esteves (IMPA, Rio de Janeiro)
  • Arnaldo Garcia (IMPA, Rio de Janeiro)
  • Álvaro Garzón (IMPA, Rio de Janeiro)
  • Letterio Gatto (UFPe, Recife/Politecnico, Torino)
  • Gerard van der Geer (Amsterdam)
  • Philippe Gimenez (Valladolid)
  • Massimo Giulietti (Perugia)
  • Dan Haran (Tel Aviv)
  • Abramo Hefez (UFF, Niterói)
  • Hajime Kaji (IMPA, Rio de Janeiro/Waseda)
  • Neuza Kakuta (UNESP, São José do Rio Preto)
  • Gabor Korchmáros (Potenza, Italy)
  • Herbert Lange (Erlangen)
  • Yves Lequain (IMPA, Rio de Janeiro)
  • Daniel Levcovitz (USP, São Carlos)
  • Paulo Antônio Machado (UFMG, Belo Horizonte)
  • Patrícia Nogueira (IMPA, Rio de Janeiro)
  • Amílcar Pacheco (UFRJ, Rio de Janeiro)
  • Victor Hugo Perez (UEM, Maringá)
  • Alexander Prestel (Konstanz)
  • Luciane Quoos (UFRJ, Rio de Janeiro)
  • Francesco Russo (UFPe, Recife)
  • Marcelo Saia (USP, São Carlos)
  • Parham Salehyan (IMPA, Rio de Janeiro)
  • Aron Simis (UFPe, Recife)
  • Michel Spira (UFMG, Belo Horizonte)
  • Henning Stichtenoth (Essen)
  • Fernando Torres (UNICAMP, Campinas)
  • Israel Vainsencher (UFPe, Recife)
  • Wolmer Vasconcelos (Rutgers)
  • Paulo Henrique Viana (PUC, Rio de Janeiro)
  • Rafael Villarreal (Mexico)
  • Fernando Xavier (UFPb, João Pessoa)
  • Alma Letícia Zarate Reyes (UFPe, Recife)