Geodesic
On the Difference of 4-Gonal Linear Systems on some Curves
Serdica Mathematical Journal, Tome 23 (1997) no. 1, pp. 59-68.

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Let C = (C, g^1/4 ) be a tetragonal curve. We consider the scrollar invariants e1 , e2 , e3 of g^1/4 . We prove that if W^1/4 (C) is a non-singular variety, then every g^1/4 ∈ W^1/4 (C) has the same scrollar invariants.
Keywords: Curve Theory, Algebraic Geometry 
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Ohbuchi, Akira. On the Difference of 4-Gonal Linear Systems on some Curves. Serdica Mathematical Journal, Tome 23 (1997) no. 1, pp. 59-68. http://geodesic.mathdoc.fr/item/SMJ2_1997_23_1_a4/