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17.178  Articles
1 of 1.719 pages  |  10  records  |  more records»
In this paper we study the projective normality of certain Artin-Schreier curves Y_f defined over a field F of characteristic p by the equations y^q+y=f(x), q being a power of p and f in F[x] being a polynomial in x of degree m, with (m,p)=1. Many Y_f cur... see more

Let X be a smooth Fano manifold equipped with a “ nice ” n-blocks collection in the sense of [3] and F a coherent sheaf on X . Assume that X is Fano and that all blocks are coherent sheaves. Here we prove that F has regularity -8 in the sense of [3] if Su... see more



Here we study the Hilbert function of the points rational over a fixed finite field  GF(q),  q = pe of some Del Pezzo surfaces and of the Veronese plane. This work is motivated by the equivalence (due to Moorhouse) between the knowledge of the H... see more


Let X? P^n be a linearly normal elliptic curve. For any P in P^n the X-rank of P is the minimal cardinality of a set S ?  X such that P in \langle S \rangle.In this paper we give an almost complete description of the stratification of P^n given by th... see more

Let X be a smooth genus g curve equipped with a simple morphism f: X -> C, where C is either the projective line or more generally any smooth curve whose gonality is computed by finitely many pencils. Here we apply a method developed by Aprodu to prove... see more

Here we give two existence theorems for smooth genus g real curves with fixed gonality and empty real locus.

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