Research

Research interests

  • Additive and Analytic Number Theory (Zero-Sum Problems, Sieve Theory, Prime Numbers, etc)
  • Finite Fields (Polynomials, Factorizations, Permutations, etc)
  • Combinatorics (Sieve Theory, Graph Theory, Counting problems in general, etc)

Publications

  • In preparation/submitted/accepted/published papers in periodics:
  1. S. Ribas; The subsums of zero-sum free sequences in finite cyclic groups (2019). Preprint.
  2. L. Reis, S. Ribas; Permutations from an arithmetic setting (2019). Submitted.
  3. F.E. Brochero Martínez, S. Ribas; The $\{1,s\}$-weighted Davenport constant in $C_n^k$ and an application in an inverse problem (2019). Submitted.
  4. Y.-R. Liu, W. Kuo, S. Ribas, K. Zhou; The Shifted Turán Sieve Method on Tournaments. To appear in: Canad. Math. Bull. (2019).
  5. F.E. Brochero Martínez, S. Ribas; Extremal product-one free sequences in $C_q \rtimes_s C_m$. J. Number Theory 204 (2019), 334-353.
  6. F.E. Brochero Martínez, S. Ribas; Extremal product-one free sequences in Dihedral and Dicyclic Groups. Disc. Math. 341 (2018), 570-578.
  • Conference papers:
  1. F.E. Brocher Martínez, S. Ribas; Infinitos Números de Carmichael. VI Simpósio Nacional - Jornada de Iniciação Científica (2012), Rio de Janeiro.

PhD Dissertation

Master Thesis

  • Title: Infinitos números de Carmichael
  • Institution: Universidade Federal de Minas Gerais
  • Advisor: F.E. Brochero Martínez
  • Date: April 24, 2013
  • Scholarship: CAPES

Scientific Iniciation

  • PICME UFMG 2009-2011. Scholarship: CNPq
  • PIC Jr 2008 (OBMEP 2007). Scholarship: CNPq
  • IC Jr em Física 2007 - UFOP. Scholarship: UFOP
  • PIC Jr 2006 (OBMEP 2005). Scholarship: CNPq

Talks

  1. S. Ribas; On extremal product-one free sequences over non-abelian groups and weighted Davenport constants. 1st Joint Meeting Brazil-France, IMPA (2019).
  2. S. Ribas (joint work with L. Reis); A new permutation class and its induced permutation polynomial. Workshop em Corpos Finitos e Aplicações, UFU (2019).
  3. S. Ribas; On extremal product-one free sequences and weighted Davenport constants. Conference on Rings and Factorizations, University of Graz, Austria (2018).
  4. S. Ribas; Sequências extremas livres de produto 1 em grupos não-abelianos e as constantes de Davenport com peso. Seminários de Pesquisa, UFV, Viçosa (2018).
  5. S. Ribas (joint work with F.E. Brochero Martínez); On Davenport constant in some non-abelian groups and their inverse problems. Brazilian Algebra Meeting, Unicamp, Campinas (2018).
  6. S. Ribas (joint work with W. Kuo, Y.-R. Liu & K. Zhou); Shifted Turán sieve method on tournaments. Brazilian Probability School, IMPA (2017). Poster presentation.
  7. S. Ribas (joint work with F.E. Brochero Martínez); EGZ constant and some generalizations. Brazilian Algebra Meeting, UFVJM, Diamantina (2016).
  8. S. Ribas (joint work with F.E. Brochero Martínez); Infinitely many Carmichael numbers. Workshop on Combinatorics and Finite Fields in Cryptography and Codes, UFSC, Florianópolis (2016).
  9. S. Ribas; EGZ constant and its many generalizations. Student Number Theory Seminar, University of Waterloo, Waterloo (2015).
  10. S. Ribas; Infinitely many Carmichael numbers. Research School: Bounded Gaps Between Primes, University of Oxford (2014). Poster presentation.
  11. S. Ribas (joint work with F.E. Brochero Martínez); Infinitos Números de Carmichael. IV Simpósio Nacional - Jornadas de Iniciação Científica, IMPA (2012).
  12. S. Ribas; O Princípio da Indução Finita. Semana de Ciência e Tecnologia. CEFET Ouro Preto (2008). Poster presentation.

Supervisions

  • Undergraduate
  1. Allan Apolinário (2019, undergrad thesis. Title: Continued Fractions)
  2. Letícia Aparecida de Oliveira (2018, undergrad program for math olympics medalists. Title: Error Correcting Codes)
  3. Yasmin Caroline Miani Cardoso (2017-2018, undergrad program for math olympics medalists.. Title: Real Analysis and Error Correcting Codes)
  • High school
  1. Gabriel Souza Oliveira (2018, high school program for math olympics medalists. Title: Error Correcting Codes)

Master Thesis Committee

  • Cinthia; título. UFV, 2019.
  • Bruna Maria Frutuoso; título. UFV, 2019.
  • José Alves Oliveira; título. UFMG, 2019.
  • Luana de Souza Marques; título. UFV, 2019.

Conferences, Workshops and Events