Sum Formula for SL$_2$ over a Totally Real Number Field

Sum Formula for SL$_2$ over a Totally Real Number Field PDF Author: Roelof W. Bruggeman
Publisher: American Mathematical Soc.
ISBN: 0821842021
Category : Mathematics
Languages : en
Pages : 96

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Book Description
The authors prove a general form of the sum formula $\mathrm{SL}_2$ over a totally real number field. This formula relates sums of Kloosterman sums to products of Fourier coefficients of automorphic representations. The authors give two versions: the spectral sum formula (in short: sum formula) and the Kloosterman sum formula. They have the independent test function in the spectral term, in the sum of Kloosterman sums, respectively.

Sum Formula for SL$_2$ over a Totally Real Number Field

Sum Formula for SL$_2$ over a Totally Real Number Field PDF Author: Roelof W. Bruggeman
Publisher: American Mathematical Soc.
ISBN: 0821842021
Category : Mathematics
Languages : en
Pages : 96

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Book Description
The authors prove a general form of the sum formula $\mathrm{SL}_2$ over a totally real number field. This formula relates sums of Kloosterman sums to products of Fourier coefficients of automorphic representations. The authors give two versions: the spectral sum formula (in short: sum formula) and the Kloosterman sum formula. They have the independent test function in the spectral term, in the sum of Kloosterman sums, respectively.

Points and Curves in the Monster Tower

Points and Curves in the Monster Tower PDF Author: Richard Montgomery
Publisher: American Mathematical Soc.
ISBN: 0821848186
Category : Mathematics
Languages : en
Pages : 154

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Book Description
Cartan introduced the method of prolongation which can be applied either to manifolds with distributions (Pfaffian systems) or integral curves to these distributions. Repeated application of prolongation to the plane endowed with its tangent bundle yields the Monster tower, a sequence of manifolds, each a circle bundle over the previous one, each endowed with a rank $2$ distribution. In an earlier paper (2001), the authors proved that the problem of classifying points in the Monster tower up to symmetry is the same as the problem of classifying Goursat distribution flags up to local diffeomorphism. The first level of the Monster tower is a three-dimensional contact manifold and its integral curves are Legendrian curves. The philosophy driving the current work is that all questions regarding the Monster tower (and hence regarding Goursat distribution germs) can be reduced to problems regarding Legendrian curve singularities.

Moderate Deviations for the Range of Planar Random Walks

Moderate Deviations for the Range of Planar Random Walks PDF Author: Richard F. Bass
Publisher: American Mathematical Soc.
ISBN: 0821842870
Category : Mathematics
Languages : en
Pages : 98

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Book Description
Given a symmetric random walk in ${\mathbb Z}^2$ with finite second moments, let $R_n$ be the range of the random walk up to time $n$. The authors study moderate deviations for $R_n -{\mathbb E}R_n$ and ${\mathbb E}R_n -R_n$. They also derive the corresponding laws of the iterated logarithm.

Index Theory, Eta Forms, and Deligne Cohomology

Index Theory, Eta Forms, and Deligne Cohomology PDF Author: Ulrich Bunke
Publisher: American Mathematical Soc.
ISBN: 0821842846
Category : Mathematics
Languages : en
Pages : 134

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Book Description
This paper sets up a language to deal with Dirac operators on manifolds with corners of arbitrary codimension. In particular the author develops a precise theory of boundary reductions. The author introduces the notion of a taming of a Dirac operator as an invertible perturbation by a smoothing operator. Given a Dirac operator on a manifold with boundary faces the author uses the tamings of its boundary reductions in order to turn the operator into a Fredholm operator. Its index is an obstruction against extending the taming from the boundary to the interior. In this way he develops an inductive procedure to associate Fredholm operators to Dirac operators on manifolds with corners and develops the associated obstruction theory.

Topological Automorphic Forms

Topological Automorphic Forms PDF Author: Mark Behrens
Publisher: American Mathematical Soc.
ISBN: 082184539X
Category : Mathematics
Languages : en
Pages : 167

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Book Description
The authors apply a theorem of J. Lurie to produce cohomology theories associated to certain Shimura varieties of type $U(1,n-1)$. These cohomology theories of topological automorphic forms ($\mathit{TAF}$) are related to Shimura varieties in the same way that $\mathit{TMF}$ is related to the moduli space of elliptic curves.

Banach Algebras on Semigroups and on Their Compactifications

Banach Algebras on Semigroups and on Their Compactifications PDF Author: Harold G. Dales
Publisher: American Mathematical Soc.
ISBN: 0821847759
Category : Mathematics
Languages : en
Pages : 178

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Book Description
"Volume 205, number 966 (end of volume)."

The Scaling Limit of the Correlation of Holes on the Triangular Lattice with Periodic Boundary Conditions

The Scaling Limit of the Correlation of Holes on the Triangular Lattice with Periodic Boundary Conditions PDF Author: Mihai Ciucu
Publisher: American Mathematical Soc.
ISBN: 0821843265
Category : Science
Languages : en
Pages : 118

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Book Description
The author defines the correlation of holes on the triangular lattice under periodic boundary conditions and studies its asymptotics as the distances between the holes grow to infinity. He proves that the joint correlation of an arbitrary collection of triangular holes of even side-lengths (in lattice spacing units) satisfies, for large separations between the holes, a Coulomb law and a superposition principle that perfectly parallel the laws of two dimensional electrostatics, with physical charges corresponding to holes, and their magnitude to the difference between the number of right-pointing and left-pointing unit triangles in each hole. The author details this parallel by indicating that, as a consequence of the results, the relative probabilities of finding a fixed collection of holes at given mutual distances (when sampling uniformly at random over all unit rhombus tilings of the complement of the holes) approach, for large separations between the holes, the relative probabilities of finding the corresponding two dimensional physical system of charges at given mutual distances. Physical temperature corresponds to a parameter refining the background triangular lattice. He also gives an equivalent phrasing of the results in terms of covering surfaces of given holonomy. From this perspective, two dimensional electrostatic potential energy arises by averaging over all possible discrete geometries of the covering surfaces.

Holder-Sobolev Regularity of the Solution to the Stochastic Wave Equation in Dimension Three

Holder-Sobolev Regularity of the Solution to the Stochastic Wave Equation in Dimension Three PDF Author: Robert C. Dalang
Publisher: American Mathematical Soc.
ISBN: 0821842889
Category : Mathematics
Languages : en
Pages : 83

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Book Description
The authors study the sample path regularity of the solution of a stochastic wave equation in spatial dimension $d=3$. The driving noise is white in time and with a spatially homogeneous covariance defined as a product of a Riesz kernel and a smooth function. The authors prove that at any fixed time, a.s., the sample paths in the spatial variable belong to certain fractional Sobolev spaces. In addition, for any fixed $x\in\mathbb{R}^3$, the sample paths in time are Holder continuous functions. Further, the authors obtain joint Holder continuity in the time and space variables. Their results rely on a detailed analysis of properties of the stochastic integral used in the rigourous formulation of the s.p.d.e., as introduced by Dalang and Mueller (2003). Sharp results on one- and two-dimensional space and time increments of generalized Riesz potentials are a crucial ingredient in the analysis of the problem. For spatial covariances given by Riesz kernels, the authors show that the Holder exponents that they obtain are optimal.

Composition Operators on Hardy-Orlicz Spaces

Composition Operators on Hardy-Orlicz Spaces PDF Author: Pascal Lefèvre
Publisher: American Mathematical Soc.
ISBN: 082184637X
Category : Mathematics
Languages : en
Pages : 87

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Book Description
"The authors investigate composition operators on Hardy-Orlicz spaces when the Orlicz function Psi grows rapidly: compactness, weak compactness, to be p-summing, order bounded, ... , and show how these notions behave according to the growth of Psi. They introduce an adapted version of Carleson measure. They construct various examples showing that their results are essentially sharp. In the last part, they study the case of Bergman-Orlicz spaces."--Publisher's description.

Unfolding CR Singularities

Unfolding CR Singularities PDF Author: Adam Coffman
Publisher: American Mathematical Soc.
ISBN: 0821846574
Category : Mathematics
Languages : en
Pages : 105

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Book Description
"Volume 205, number 962 (first of 5 numbers)."