Le Matematiche  

Wahei Hara

In this paper, we study the derived category of certain toric va- rieties with Picaed number three which are blowing-up another toric varieties along their torus invariant loci of codimension at most three. We construct strong full exceptional collections... see more

Sepideh Tashvighi

We further analyse the moduli space of stable curves with level structure provided by Chiodo and Farkas in [2]. Their result builds upon Harris and Mumford analysis of the locus of singularities of the moduli space of curves and shows in particular that f... see more

Seyed Zoalroshd

In this short note we give a universal inequality between the largest eigenvalueof the Riesz potentials and non-zero Neumann eigenvalue for domains on hemispheres of S^n

Alberto Calabri, Ezio Stagnaro

We show how to construct some old and new surfaces of general typewith vanishing geometric genus from double planes,by computing explicit equations of their branch curves.

Masahiro Ohno

We describe nef vector bundles on a projective space with first Chern class three and second Chern class eight over an algebraically closed field of characteristic zero by giving them a minimal resolution in terms of a full strong exceptional collect... see more

Giuseppe Zito

In this paper we provide an elementary and easy proof that a proper subalgebra of the matrix algebra K^n,n, with n>=3 and K an arbitrary field, has dimension strictly less than n^2-1

Shin-Yao Jow, Adrien SAUVAGET, Hacen ZELACI

In this paper, we study principally polarized abelian varieties X of dimension g with a curve C  such that the class of C is m times theminimal class.  Welters introduced the formalism of complementarypairs to handle this problem in the case m =... see more

Ananyo Dan, Mohamad Zaman Fashami, Natascia Zangani

In this article, we study subloci of solvable curves in Mg which are contained in either a K3-surface or a quadric or a cubic surface. We give a bound on the dimension of such subloci. In the case of complete intersection genus g curves in a cubic surface... see more

Roberto Laface, Cèsar Martìnez

Sara Torelli, Filippo Francesco Favale

Motivated by a conjecture of Xiao, we study families of coverings of elliptic curves and their corresponding Prym map . More precisely, we describe the codi?erential of the period map P associated to in terms of the residue of meromorphic 1-forms and then... see more

Luca Rizzi, Federico Caucci, Yonghwa Cho

Let S be a very general complete intersection surface of multidegree (d_1,d_2) in P^4. The following problem arises: determine the couples (d_1,d_2) such that the surface S does not have any "non-evident" rational map to other surfaces. By non-evident rat... see more