On Newstaed' s conjecture on vector bundles on algebraic curves.
On nodal plane curves.
On Open Algebraic Surfaces IP2 ? C.
On osculating cones and the Riemann-Kempf singularity theorem for hyperelliptic curves, trigonal curves, and smooth plane quintics
On ovals on Riemann surfaces.
We prove that k (k ≥ 9) non-conjugate symmetries of a Riemann surface of genus g have at most 2g - 2 + 2r - 3(9 - k) ovals in total, where r is the smallest positive integer for which k ≤ 2r - 1. Furthermore we prove that for arbitrary k ≥ 9 this bound is sharp for infinitely many values of g.
On -adic uniformization
On p-adic analogues of the conjectures of Birch and Swinnerton-Dyer.
On p-adic L-functions Associated to Elliptic Curves.
On Pencils of Curves and Deformations of Minimally Elliptic Singularities .
On period relations for abelian integrals on algebraic curves
On Petri's Analysis of the Linear System of Quadrics through a Canonical Curve.
On p-hyperellipticity of doubly symmetric Riemann surfaces.
Studying commuting symmetries of p-hyperelliptic Riemann surfaces, Bujalance and Costa found in [3] upper bounds for the degree of hyperellipticity of the product of commuting (M - q)- and (M - q')-symmetries, depending on their separabilities. Here, we find necessary and sufficient conditions for an integer p to be the degree of hyperellipticity of the product of two such symmetries, taking into account their separabilities. We also give some results concerning the existence and uniqueness of symmetries...
On Picard bundles over Prym varieties.
On plane curves with one place at infinity.
On polarized normal surfaces.
On Postulation of Curves in IP4.
On projective varieties of minimal degree.
On proximity relations for valuations dominating a two-dimensional regular local ring.
The purpose of this paper is to define a new numerical invariant of valuations centered in a regular two-dimensional regular local ring. For this, we define a sequence of non-negative rational numbers δν = {δν(j)}j ≥ 0 which is determined by the proximity relations of the successive quadratic transformations at the points determined by a valuation ν. This sequence is characterized by seven combinatorial properties, so that any sequence of non-negative rational numbers having the above properties...
On Quadratic forms isotropic over the function field of a comic.
On quadrirational Yang-Baxter maps.