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We establish the geometric Shafarevich boundedness conjecture for the moduli stack of stable minimal models, including in particular the moduli stack of KSB pairs.

Algebraic Geometry · Mathematics 2026-05-12 Junchao Shentu

We show that toric surface singularities deform to toric surface singularities - both in equal and mixed characteristic. As an application, we establish Riemenschneiders conjecture that isolated cyclic quotient singularities of any…

Algebraic Geometry · Mathematics 2025-12-01 Matthias Pfeifer

We show that a Wigner induced random orthonormal basis of spherical harmonics is almost surely quantum ergodic. Here, a random basis is identified with an element of the product probability space of unitary groups, each endowed with the…

Probability · Mathematics 2021-07-13 Robert Chang

In this paper The Ergodic Hypothesis is proven for one class of functions defined in the infinite dimensional unite cube where is given an action of some semigroup of mappings without the condition on metric transitivity. The result has not…

General Mathematics · Mathematics 2011-03-01 Ilgar Sh. Jabbarov

The concept of ergodicity---the convergence of the temporal averages of observables to their ensemble averages---is the cornerstone of thermodynamics. The transition from a predictable, integrable behavior to ergodicity is one of the most…

Statistical Mechanics · Physics 2015-03-05 Maxim Olshanii

We discuss the relationship among various conjectures in the minimal model theory including the finite generation conjecture of the log canonical rings and the abundance conjecture. In particular, we show that the finite generation…

Algebraic Geometry · Mathematics 2013-07-15 Osamu Fujino , Yoshinori Gongyo

In homogeneous cosmologies, quantum geometry effects lead to a resolution of the classical singularity without having to invoke special boundary conditions at the singularity or introduce ad-hoc elements such as unphysical matter. The same…

General Relativity and Quantum Cosmology · Physics 2011-09-29 Abhay Ashtekar , Martin Bojowald

We extend Holowinsky and Soundararajan's proof of quantum unique ergodicity for holomorphic Hecke modular forms on SL(2,Z), by establishing it for automorphic forms of cohomological type on GL_2 over an arbitrary number field which satisfy…

Number Theory · Mathematics 2010-08-16 Simon Marshall

We establish the real integral Hodge conjecture for 1-cycles on various classes of uniruled threefolds (conic bundles, Fano threefolds with no real point, some del Pezzo fibrations) and on conic bundles over higher-dimensional bases which…

Algebraic Geometry · Mathematics 2020-10-20 Olivier Benoist , Olivier Wittenberg

A discrete model of quantum ergodicity of linear maps generated by symplectic matrices $A \in \mathrm{Sp}(2d,\mathbb{Z})$ modulo an integer $N\ge 1$, has been studied for $d=1$ and almost all $N$ by P. Kurlberg and Z. Rudnick (2001). Their…

Number Theory · Mathematics 2025-09-16 Subham Bhakta , Igor E. Shparlinski

Here we study the behaviour of the horocyclic orbit of a vector on the unit tangent bundle of a geometrically infinite surface with variable negative curvature, when the corresponding geodesic ray is almost minimizing and the injectivity…

Dynamical Systems · Mathematics 2023-05-29 Victoria García

Let $\Gamma$ be a discrete countable group acting isometrically on a measurable field $\mathbf{X}$ of CAT(0)-spaces of finite telescopic dimension over some ergodic standard Borel probability $\Gamma$-space $(\Omega,\mu)$. If $\mathbf{X}$…

Geometric Topology · Mathematics 2025-06-05 Filippo Sarti , Alessio Savini

We prove the existence of families of distinct isotopy classes of physical unknots through the key concept of parametrised thickness. These unknots have prescribed length, tube thickness, a uniform bound on curvature, and cannot be…

Geometric Topology · Mathematics 2025-06-06 José Ayala

Using geodesic length functions, we define a natural family of real codimension 1 subvarieties of Teichm\"uller space, namely the subsets where the lengths of two distinct simple closed geodesics are of equal length. We investigate the…

Geometric Topology · Mathematics 2014-11-11 Greg McShane , Hugo Parlier

Given a finite volume hyperbolic surface, a fundamental polygon and an oriented closed geodesic, we associate a partial covering of the surface. We prove that given a sequence of collections of oriented closed geodesics equidistributing in…

Geometric Topology · Mathematics 2025-02-13 Asbjørn Christian Nordentoft , Ser Peow Tan

In this note we show that the Riemann moduli spaces $M_{g, n}$ equipped with the Weil--Petersson metric are quantum ergodic for $3g+n \geq 4$. We also provide other examples of singular spaces with ergodic geodesic flow for which quantum…

Analysis of PDEs · Mathematics 2021-03-31 Dean Baskin , Jesse Gell-Redman , Xiaolong Han

In this paper, we deal with the conjecture of 'Quantum Unique Ergodicity'. Z. Rudnick and P. Sarnak showed that there is no 'strong scarring' on closed geodesics for arithmetic congruence surfaces derived from a quaternion division algebra.…

Mathematical Physics · Physics 2007-05-23 Tristan Poullaouec

In this paper we study Spectral Decomposition Theorem [1] and translate it to quantum language by means of the Wigner transform. We obtain a quantum version of Spectral Decomposition Theorem (QSDT) which enables us to achieve three distinct…

Mathematical Physics · Physics 2014-11-11 Ignacio Gomez , Mario Castagnino

We consider singular integrals associated to homogeneous kernels on self similar sets. Using ideas from ergodic theory we prove, among other things, that in Euclidean spaces the principal values of singular integrals associated to real…

Classical Analysis and ODEs · Mathematics 2016-10-17 Vasilis Chousionis , Mariusz Urbański

Spherically symmetric geometrodynamics is studied for scalar-tensor theory and Einstein General Relativity minimally coupled to a scalar field. We discussed the importance of boundary terms and derived the equations of motion in the…

General Relativity and Quantum Cosmology · Physics 2025-07-08 Matteo Galaverni , Gabriele Gionti
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