1,272 research outputs found

    The global geometry of the moduli space of curves

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    This is a survey written for the Proceedings of the AMS Summer Institute in Algebraic Geometry held in Seattle in 2005. Topics discussed in the survey include the ample and the effective cone of the moduli space of curves, Kodaira dimension, Slope Conjecture, log canonical models etc.Comment: 23 pages. Minor revisions. To appear in the Proceedings of the AMS Summer Research Institute in Algebraic Geometry-Seattle 200

    Prym varieties and their moduli

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    We discuss the geometry of the moduli space of Prym varieties. The article is based on series of lectures given in Bedlewo and Luminy. The first section of the paper contains a detailed historical account of the lives of Friedrich Prym and Friedrich Schottky.Comment: 35 pages, minor corrections and additions. To appear in "Contributions to algebraic geometry" edited by P. Pragacz and published by the EM

    Heavy Flavour Physics at CDF

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    We present recent CDF measurements of mass, lifetime and CP violation properties of B hadrons. The analyzes presented in this paper use up to 2.8/fb of data. CDF has already accumulated close to 5/fb of data which promises significant improvements of these analyzes in the near future.Comment: 4 pages, 3 figures, presented at Lake Louise Winter Institute 200

    The Geometry of the Moduli Space of Curves of Genus 23

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    We prove that the Kodaira dimension of the moduli space M_{23} of curves of genus 23 is at least 2. We also present some evidence for the hypothesis that the Kodaira dimension of the moduli space is actually equal to 2. Note that for g > 23 the moduli space is of general type, while for g\leq 22, Harris and Morrison conjectured that M_g is uniruled. The result on M_{23} is obtained by investigating the relative position of three explicit multicanonical divisors which are of Brill-Noether type.Comment: 21 pages, Late
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