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Valuations and plurisubharmonic singularitiesPrimeFaces.cw("AccordionPanel","widget_formSmash_some",{id:"formSmash:some",widgetVar:"widget_formSmash_some",multiple:true}); PrimeFaces.cw("AccordionPanel","widget_formSmash_all",{id:"formSmash:all",widgetVar:"widget_formSmash_all",multiple:true});
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2008 (English)In: Publications of the Research Institute for Mathematical Sciences, ISSN 0034-5318, E-ISSN 1663-4926, Vol. 44, no 2, p. 449-494Article in journal (Refereed) Published
##### Abstract [en]

##### Place, publisher, year, edition, pages

2008. Vol. 44, no 2, p. 449-494
##### Keywords [en]

multiplier ideals, arithmetic surfaces, algebraic variety, potential-theory, equidistribution, resolution, capacity, theorems, points, fields
##### Identifiers

URN: urn:nbn:se:kth:diva-17705ISI: 000257781600012Scopus ID: 2-s2.0-47749129254OAI: oai:DiVA.org:kth-17705DiVA, id: diva2:335750
#####

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##### Note

QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

We extend to higher dimensions some of the valuative analysis of singularities of plurisubharmonic (psh) functions developed by the first two authors. Following Kontsevich and Soibelman we describe the geometry of the space V of all normalized valuations on C[x(1), ..., x(n)] centered at the origin. It is a union of simplices naturally endowed with an affine structure. Using relative positivity properties of divisors living on modifications of C-n above the origin, we define formal psh functions on V, designed to be analogues of the usual psh functions. For bounded formal psh functions on V, we define a mixed Monge-Ampere operator which reflects the intersection theory of divisors above the origin of C-n. This operator associates to any (n - 1)-tuple of formal psh functions a positive measure of finite mass on V. Next, we show that the collection of Lelong numbers of a given germ a of a psh function at all infinitely near points induces a formal psh function u on V. When phi is a psh Holder weight in the sense of Demailly, the generalized Lelong number v(phi)(u) equals the integral of u against the Monge-Ampere measure of phi. In particular, any generalized Lelong number is an average of valuations. We also show how to compute the multiplier ideal of u and the relative type of u with respect to phi in the sense of Rashkovskii, in terms of u and phi.

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