Displaying similar documents to “Groenstein curves and symmetry of the semigroup of values.”

Weierstrass Points with First Non-Gap Four on a Double Covering of a Hyperelliptic Curve II

Komeda, Jiryo, Ohbuchi, Akira (2008)

Serdica Mathematical Journal

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2000 Mathematics Subject Classification: Primary 14H55; Secondary 14H30, 14J26. A 4-semigroup means a numerical semigroup whose minimum positive integer is 4. In [7] we showed that a 4-semigroup with some conditions is the Weierstrass semigroup of a ramification point on a double covering of a hyperelliptic curve. In this paper we prove that the above statement holds for every 4-semigroup.