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5 papers · 2 filters
On the topology of semi-algebraic functions on closed semi-algebraic sets
Nicolas Dutertre
We consider a semi-algebraic function defined on a closed semi-algebraic set X. We give formulas relating the topology of X to the indices of the critical points of the function an…
Higher dimensional tautological inequalities and applications
Carlo Gasbarri, Gianluca Pacienza, Erwan Rousseau
We study the degeneracy of holomorphic mappings tangent to holomorphic foliations on projective manifolds. Using Ahlfors currents in higher dimension, we obtain several strong dege…
Hypersurfaces with degenerate duals and the Geometric Complexity Theory Program
J. M. Landsberg, Laurent Manivel, Nicolas Ressayre
We determine set-theoretic defining equations for the variety of hypersurfaces of degree d in an N-dimensional complex vector space that have dual variety of dimension at most k. W…
On nodal prime Fano threefolds of degree 10
Olivier Debarre, Atanas Iliev, Laurent Manivel
We study the geometry and the period map of nodal complex prime Fano threefolds with index 1 and degree 10. We show that these threefolds are birationally isomorphic to Verra solid…
The minimum and maximum number of rational points on jacobian surfaces over finite fields
Safia Haloui
We give some bounds on the numbers of rational points on abelian varieties and jacobians varieties over finite fields. The main result is that we determine the maximum and minimum…