A non linear version of Noether's type theorem.
, 2004 Let L be a line bundle on a smooth curve C, which defines a birational morphism f C onto f(C). We prove that, under suitable assumptions on L, which are satisfied by Castelnuovo’s curves, a generic section in 2L can be written as a^2 +b^2+c^2 with a, b ...
BRIVIO, SONIA, PIROLA, GIAN PIETRO
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