Results 1 to 10 of about 1,174 (55)

Notes on extremal and tame valued fields [PDF]

open access: yes, 2016
We extend the characterization of extremal valued fields given in [2] to the missing case of valued fields of mixed characteristic with perfect residue field. This leads to a complete characterization of the tame valued fields that are extremal.
Engler, Eršov, Fried, JIZHAN HONG
core   +2 more sources

Uniform K-stability, Duistermaat-Heckman measures and singularities of pairs [PDF]

open access: yes, 2016
The purpose of the present paper is to set up a formalism inspired from non-Archimedean geometry to study K-stability. We first provide a detailed analysis of Duistermaat-Heckman measures in the context of test configurations, characterizing in ...
Boucksom, Sébastien   +2 more
core   +3 more sources

A variational approach to the Yau-Tian-Donaldson conjecture

open access: yes, 2020
We give a variational proof of a version of the Yau-Tian-Donaldson conjecture for twisted K\"ahler-Einstein currents, and use this to express the greatest (twisted) Ricci lower bound in terms of a purely algebro-geometric stability threshold.
Berman, Robert   +2 more
core   +3 more sources

Tame class field theory for arithmetic schemes [PDF]

open access: yes, 2004
We extend the unramified class field theory for arithmetic schemes of K. Kato and S. Saito to the tame case. Let $X$ be a regular proper arithmetic scheme and let $D$ be a divisor on $X$ whose vertical irreducible components are normal schemes. Theorem:
Alexander Schmidt   +12 more
core   +3 more sources

Valuations and plurisubharmonic singularities

open access: yes, 2007
We extend to higher dimensions some of the valuative analysis of singularities of plurisubharmonic (psh) functions developed by the last two authors. Following Kontsevich and Soibelman we describe the geometry of the space V of all normalized valuations ...
Boucksom, Sebastien   +2 more
core   +5 more sources

Weight functions on non-archimedean analytic spaces and the Kontsevich-Soibelman skeleton

open access: yes, 2013
We associate a weight function to pairs consisting of a smooth and proper variety X over a complete discretely valued field and a differential form on X of maximal degree.
Mustata, Mircea, Nicaise, Johannes
core   +1 more source

Rational Connectivity and Analytic Contractibility

open access: yes, 2016
Let k be an algebraically closed field of characteristic 0, and let f be a morphism of smooth projective varieties from X to Y over the ring k((t)) of formal Laurent series.
Brown, Morgan, Foster, Tyler
core   +1 more source

Uniform K-stability and asymptotics of energy functionals in K\"ahler geometry

open access: yes, 2018
Consider a polarized complex manifold (X,L) and a ray of positive metrics on L defined by a positive metric on a test configuration for (X,L). For most of the common functionals in K\"ahler geometry, we prove that the slope at infinity along the ray is ...
Boucksom, Sébastien   +2 more
core   +3 more sources

Representation Growth of Linear Groups

open access: yes, 2008
Let $\Gamma$ be a group and $r_n(\Gamma)$ the number of its $n$-dimensional irreducible complex representations. We define and study the associated representation zeta function $\calz_\Gamma(s) = \suml^\infty_{n=1} r_n(\Gamma)n^{-s}$. When $\Gamma$ is an
Larsen, M., Lubotzky, A.
core   +1 more source

Singular semipositive metrics in non-Archimedean geometry

open access: yes, 2014
Let X be a smooth projective Berkovich space over a complete discrete valuation field K of residue characteristic zero, endowed with an ample line bundle L.
Boucksom, S., Favre, C., Jonsson, M.
core   +1 more source

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