Polars of Artin-Schreier curves

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Universidade Federal Fluminense, Departamento de Matemática Aplicada, R. São Paulo s/n, Campus do Valonguinho, 24020-005 Niterói, RJ, Brazil
Departamento de Matemática - IBILCE, R. Cristovão Colombo 2265, J. Nazareth, 15054-000 S. José do Rio Preto, SP, Brazil

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