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Type: Artigo de periódico
Title: Curves of large genus covered by the Hermitian curve
Author: Cossidente, A
Korchmaros, G
Torres, F
Abstract: For the Hermitian curve H defined over the finite field F-q2, we give a complete classification of Galois coverings of H of prime degree. The corresponding quotient curves turn out to be special cases of wider families of curves F-q2-covered by H arising from subgroups of the special linear group SL(2,F-q) or from subgroups in the normaliser of the Singer group of the projective unitary group PGU(3, F-q2) Since curves F-q2-covered by H are maximal over F-q2, our results provide some classification and existence theorems for maximal curves having large genus, as well as several values for the spectrum of the genera of maximal curves. For every q(2), both the upper limit and the second largest genus in the spectrum are known, but the determination of the third largest value is still in progress. A discussion on the "third largest genus problem" including some new results and a detailed account of current work is given.
Country: EUA
Editor: Marcel Dekker Inc
Rights: fechado
Identifier DOI: 10.1080/00927870008827115
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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