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On the number of rational points of Artin-Schreier's curves and hypersurfaces

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Autor(es):
Martinez, F. E. Brochero ; Oliveira, Daniela
Número total de Autores: 2
Tipo de documento: Artigo Científico
Fonte: DESIGNS CODES AND CRYPTOGRAPHY; v. 92, n. 10, p. 22-pg., 2024-06-05.
Resumo

Let Fqn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathbb {F}_{q<^>n}$$\end{document} represent the finite field with qn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$q<^>n$$\end{document} elements. In this paper, our focus is on determining the number of Fqn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathbb {F}_{q<^>n}$$\end{document}-rational points for two specific objects: an affine Artin-Schreier curve given by the equation yq-y=x(xqi-x)-lambda\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$y<^>q-y = x(x<^>{q<^>i}-x)-\lambda $$\end{document}, and an Artin-Schreier hypersurface given by the equation yq-y=& sum;j=1rajxj(xjqij-xj)-lambda\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$y<^>q-y=\sum _{j=1}<^>r a_jx_j(x_j<^>{q<^>{i_j}}-x_j)-\lambda $$\end{document}. Additionally, we establish that the Weil bound is only achieved in these cases when the trace of the element lambda is an element of Fqn\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\lambda \in \mathbb {F}_{q<^>n}$$\end{document} over the subfield Fq\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathbb {F}_q$$\end{document} is equal to zero. (AU)

Processo FAPESP: 22/14004-7 - Tópicos em Corpos Finitos: códigos cíclicos, hipersuperfícies de Artin-Schreier e trinômios irredutíveis
Beneficiário:Daniela Alves de Oliveira
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado