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We prove Koll\'{a}r conjecture for weighted homogeneous surface singularities with big central node. More precisely, we show that every irreducible component of the deformation space of the singularity is parametrized by a certain partial…

Algebraic Geometry · Mathematics 2023-06-13 Jaekwan Jeon , Dongsoo Shin

Orthogonal polynomials with respect to a weight function defined on a wedge in the plane are studied. A basis of orthogonal polynomials is explicitly constructed for two large class of weight functions and the convergence of Fourier…

Classical Analysis and ODEs · Mathematics 2018-07-06 Sheehan Olver , Yuan Xu

We provide a representation in terms of certain canonical functions for a sequence of polynomials orthogonal with respect to a weight that is strictly positive and analytic on the unit circle. These formulas yield a complete asymptotic…

Classical Analysis and ODEs · Mathematics 2007-05-23 A. Martinez-Finkelshtein , K. T. -R. McLaughlin , E. B. Saff

We consider the semilinear wave equation in higher dimensions with power nonlinearity in the super-conformal range, and its perturbations with lower order terms, including the Klein-Gordon equation. We improve the upper bounds on blow-up…

Analysis of PDEs · Mathematics 2013-01-04 Mohamed-Ali Hamza , Hatem Zaag

This is the first in a series of papers devoted to the blow up analysis for the quenching phenomena in a parabolic MEMS equation. In this paper, we first give an optimal H\"{o}lder estimate for solutions to this equation by using the blow…

Analysis of PDEs · Mathematics 2024-04-05 Kelei Wang , Guangzeng Yi

We show that if a compact K\"ahler manifold admits a weighted extremal metric for the action of a torus, so too does its blowup at a relatively stable point that is fixed by both the torus action and the extremal field. This generalises…

Differential Geometry · Mathematics 2025-05-08 Michael Hallam

We present a semiclassical S-matrix study of inelastic collinear electron-hydrogen scattering. A simple way to extract all necessary information from the deflection function alone without having to compute the stability matrix is described.…

Atomic Physics · Physics 2009-11-06 Gerd van de Sand , Jan M Rost

Regular chains and triangular decompositions are fundamental and well-developed tools for describing the complex solutions of polynomial systems. This paper proposes adaptations of these tools focusing on solutions of the real analogue:…

Symbolic Computation · Computer Science 2010-05-17 Changbo Chen , James H. Davenport , John P. May , Marc Moreno Maza , Bican Xia , Rong Xiao

An orthogonal involution on a central simple algebra becoming isotropic over any splitting field of the algebra, becomes isotropic over a finite odd degree extension of the base field (provided that the characteristic of the base field is…

Algebraic Geometry · Mathematics 2011-03-15 Nikita A. Karpenko

Suppose $G$ is a finite group acting on an Abelian variety $A$ such that the coarse moduli space $A/G$ is smooth. Using the recent classification result due to Auffarth, Lucchini Arteche, and Quezada, we construct an orbifold semiorthogonal…

Algebraic Geometry · Mathematics 2024-06-05 Bronson Lim , Franco Rota

We define tensor product decompositions of $E_0$-semigroups with a structure analogous to a classical theorem of Beurling. Such decompositions can be characterized by adaptedness and exactness of unitary cocycles. For CCR-flows we show that…

Operator Algebras · Mathematics 2009-02-26 Rolf Gohm

We present some results and conjectures on a generalization to the noncommutative setup of the Brouwer fixed-point theorem from the Borsuk-Ulam theorem perspective.

Quantum Algebra · Mathematics 2016-11-22 Ludwik Dabrowski

We prove the nonequivariant coherent-constructible correspondence conjectured by Fang-Liu-Treumann-Zaslow in the case of toric surfaces. Our proof is based on describing a semi-orthogonal decomposition of the constructible side under toric…

Algebraic Geometry · Mathematics 2016-04-13 Tatsuki Kuwagaki

We consider semigroups of operators on a W$^*$-algebra and prove, under appropriate assumptions, the existence of a Jacobs-DeLeeuw-Glicksberg type decomposition. This decomposition splits the algebra into a "stable" and "reversible" part…

Operator Algebras · Mathematics 2012-01-25 András Bátkai , Ulrich Groh , Dávid Kunszenti-Kovács , Marco Schreiber

In 1986, Zamolodchikov conjectured an exponential structure for the semi-classical limit of conformal blocks on a sphere. This paper provides a rigorous proof of the analog of Zamolodchikov conjecture for Liouville conformal blocks on a…

Mathematical Physics · Physics 2024-09-19 Harini Desiraju , Promit Ghosal , Andrei Prokhorov

We study the Cauchy problem for the half Ginzburg-Landau-Kuramoto (hGLK) equation with the second order elliptic operator having rough coefficients and potential type perturbation. The blow-up of solutions for hGLK equation with…

Analysis of PDEs · Mathematics 2018-04-10 Luigi Forcella , Kazumasa Fujiwara , Vladimir Georgiev , Tohru Ozawa

Using results of Gathmann, we prove the following theorem: If a smooth projective variety X has generically semisimple (p,p)-quantum cohomology, then the same is true for the blow-up of X at any number of points. This a successful test for…

Algebraic Geometry · Mathematics 2012-04-06 Arend Bayer

We prove a formula for the orbifold Chow ring of semi-projective toric DM stacks, generalizing the orbifold Chow ring formula of projective toric DM stacks by Borisov-Chen-Smith. We also consider a special kind of semi-projective toric DM…

Algebraic Geometry · Mathematics 2008-07-19 Yunfeng Jiang , Hsian-Hua Tseng

We use semiclassical propagation of singularities to give a general method for gluing together resolvent estimates. As an application we prove estimates for the analytic continuation of the resolvent of a Schr\"odinger operator for certain…

Analysis of PDEs · Mathematics 2012-11-28 Kiril Datchev , András Vasy

We prove the existence of energy solutions of the energy critical focusing wave equation in R^3 which blow up exactly at x=t=0. They decompose into a bulk term plus radiation term. The bulk is a rescaled version of the stationary "soliton"…

Analysis of PDEs · Mathematics 2007-05-23 Joachim Krieger , Wilhelm Schlag , Daniel Tataru