منابع مشابه
Zariski Chambers and Stable Base Loci
In joint work with A. Küronya and T. Szemberg we study certain asymptotic invariants of linear series: the stable base locus and the volume. In particular we are interested in the question how these invariants behave under small perturbations in the Néron-Severi space. We show that both invariants lead to a partition of the big cone into suitable subcones, and that – somewhat surprisingly – the...
متن کاملRestricted Volumes and Divisorial Zariski Decompositions
We give a relation between the existence of a Zariski decomposition and the behavior of the restricted volume of a big divisor on a smooth (complex) projective variety. Moreover, we give an analytic description of the restricted volume in the line of Boucksom’s work. It enables us to define the restricted volume of a transcendental class on a compact Kähler manifold in natural way. The relation...
متن کاملRelative Riemann - Zariski
Let k be an algebraically closed field andK be a finitely generated k-field. In the first half of the 20-th century, Zariski defined a Riemann variety RZK(k) associated to K as the projective limit of all projective k-models of K. Zariski showed that this topological space, which is now called a Riemann-Zariski (or Zariski-Riemann) space, possesses the following set-theoretic description: to gi...
متن کاملComment on "Comparison of ionization chambers of various volumes for IMRT absolute dose verification".
IMRT plans are usually verified by phantom measurements: dose distributions are measured using film and the absolute dose using an ionization chamber. The measured and calculated doses are compared and planned MUs are modified if necessary. To achieve a conformal dose distribution, IMRT fields are composed of small subfields, or "beamlets." The size of beamlets is on the order of 1 x 1 cm2. The...
متن کاملThe Basic Zariski Topology
We present the Zariski spectrum as an inductively generated basic topology à la Martin-Löf and Sambin. Since we can thus get by without considering powers and radicals, this simplifies the presentation as a formal topology initiated by Sigstam. Our treatment includes closed and open subspaces: that is, quotients and localisations. All the effective objects under consideration are introduced by ...
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ژورنال
عنوان ژورنال: Journal of Pure and Applied Algebra
سال: 2013
ISSN: 0022-4049
DOI: 10.1016/j.jpaa.2012.06.016