249 research outputs found

    Divisorial Zariski decomposition and algebraic Morse inequalities

    Full text link
    In this note we use the divisorial Zariski decomposition to give a more intrinsic version of the algebraic Morse inequalities.Comment: In this version we correct some misprints

    Quasi-negative holomorphic sectional curvature and positivity of the canonical bundle

    Full text link
    We show that if a compact complex manifold admits a K\"ahler metric whose holomorphic sectional curvature is everywhere non positive and strictly negative in at least one point, then its canonical bundle is positive.Comment: 12 pages, no figures, final version, to appear on J. Differential Geo

    Estimates of Weil-Petersson volumes via effective divisors

    Full text link
    We study the asymptotics of the Weil-Petersson volumes of the moduli spaces of compact Riemann surfaces of genus gg with nn punctures, for fixed nn as gg \to \infty

    Task Oriented Programming and Service Algorithms for Smart Robotic Cells

    Get PDF
    L'abstract è presente nell'allegato / the abstract is in the attachmen

    A compact, multi-pixel parametric light source

    Full text link
    The features of a compact, single pass, multi-pixel optical parametric generator are discussed. Several hundreds of independent high spatial-quality tunable ultrashort pulses were produced by pumping a bulk lithium triborate crystal with an array of tightly focussed intense beams. The array of beams was produced by shining a microlenses array with a large pump beam. Overall conversion efficiency to signal and idler up to 30% of the pump beam has been reported. Shot-to-shot energy fluctuation down to 3% was achieved for the generated radiation.Comment: 11 pages, 6 figures, submitted to "Optics Communications

    Weil-Petersson geometry for families of hyperbolic conical Riemann Surfaces

    Full text link
    We study the Weil-Petersson geometry for holomorphic families of Riemann Surfaces equipped with the unique conical metric of constant curvature -1.Comment: 32 pages, expanded versio
    corecore