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

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

Author: Roelof W. Bruggeman

Publisher: American Mathematical Soc.

Published: 2009-01-21

Total Pages: 96

ISBN-13: 0821842021

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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.


Kuznetsov's Trace Formula and the Hecke Eigenvalues of Maass Forms

Kuznetsov's Trace Formula and the Hecke Eigenvalues of Maass Forms

Author: Andrew Knightly

Publisher: American Mathematical Soc.

Published: 2013-06-28

Total Pages: 144

ISBN-13: 0821887440

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The authors give an adelic treatment of the Kuznetsov trace formula as a relative trace formula on $\operatorname{GL}(2)$ over $\mathbf{Q}$. The result is a variant which incorporates a Hecke eigenvalue in addition to two Fourier coefficients on the spectral side. The authors include a proof of a Weil bound for the generalized twisted Kloosterman sums which arise on the geometric side. As an application, they show that the Hecke eigenvalues of Maass forms at a fixed prime, when weighted as in the Kuznetsov formula, become equidistributed relative to the Sato-Tate measure in the limit as the level goes to infinity.


The Conference on L-Functions

The Conference on L-Functions

Author: Lin Weng

Publisher: World Scientific

Published: 2007

Total Pages: 383

ISBN-13: 981270504X

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This invaluable volume collects papers written by many of the world's top experts on L-functions. It not only covers a wide range of topics from algebraic and analytic number theories, automorphic forms, to geometry and mathematical physics, but also treats the theory as a whole. The contributions reflect the latest, most advanced and most important aspects of L-functions. In particular, it contains Hida's lecture notes at the conference and at the Eigenvariety semester in Harvard University and Weng's detailed account of his works on high rank zeta functions and non-abelian L-functions.


On the convergence of $\sum c_kf(n_kx)$

On the convergence of $\sum c_kf(n_kx)$

Author: Istvan Berkes

Publisher: American Mathematical Soc.

Published: 2009

Total Pages: 88

ISBN-13: 0821843249

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Presents a general study of the convergence problem and intends to prove several fresh results and improve a number of old results in the field. This title studies the case when the nk are random and investigates the discrepancy the sequence (nkx) mod 1.


Heat Eisenstein Series on $\mathrm {SL}_n(C)$

Heat Eisenstein Series on $\mathrm {SL}_n(C)$

Author: Jay Jorgenson

Publisher: American Mathematical Soc.

Published: 2009

Total Pages: 146

ISBN-13: 0821840444

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The purpose of this Memoir is to define and study multi-variable Eisenstein series attached to heat kernels. Fundamental properties of heat Eisenstein series are proved, and conjectural behavior, including their role in spectral expansions, are stated.


Yang-Mills Connections on Orientable and Nonorientable Surfaces

Yang-Mills Connections on Orientable and Nonorientable Surfaces

Author: Nan-Kuo Ho

Publisher: American Mathematical Soc.

Published: 2009-10-08

Total Pages: 113

ISBN-13: 0821844911

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In ``The Yang-Mills equations over Riemann surfaces'', Atiyah and Bott studied Yang-Mills functional over a Riemann surface from the point of view of Morse theory. In ``Yang-Mills Connections on Nonorientable Surfaces'', the authors study Yang-Mills functional on the space of connections on a principal $G_{\mathbb{R}}$-bundle over a closed, connected, nonorientable surface, where $G_{\mathbb{R}}$ is any compact connected Lie group. In this monograph, the authors generalize the discussion in ``The Yang-Mills equations over Riemann surfaces'' and ``Yang-Mills Connections on Nonorientable Surfaces''. They obtain explicit descriptions of equivariant Morse stratification of Yang-Mills functional on orientable and nonorientable surfaces for non-unitary classical groups $SO(n)$ and $Sp(n)$.


Center Manifolds for Semilinear Equations with Non-Dense Domain and Applications to Hopf Bifurcation in Age Structured Models

Center Manifolds for Semilinear Equations with Non-Dense Domain and Applications to Hopf Bifurcation in Age Structured Models

Author: Pierre Magal

Publisher: American Mathematical Soc.

Published: 2009

Total Pages: 84

ISBN-13: 0821846531

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Several types of differential equations, such as delay differential equations, age-structure models in population dynamics, evolution equations with boundary conditions, can be written as semilinear Cauchy problems with an operator which is not densely defined in its domain. The goal of this paper is to develop a center manifold theory for semilinear Cauchy problems with non-dense domain. Using Liapunov-Perron method and following the techniques of Vanderbauwhede et al. in treating infinite dimensional systems, the authors study the existence and smoothness of center manifolds for semilinear Cauchy problems with non-dense domain. As an application, they use the center manifold theorem to establish a Hopf bifurcation theorem for age structured models.


Rock Blocks

Rock Blocks

Author: Will Turner

Publisher: American Mathematical Soc.

Published: 2009-10-08

Total Pages: 117

ISBN-13: 0821844628

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Consider representation theory associated to symmetric groups, or to Hecke algebras in type A, or to $q$-Schur algebras, or to finite general linear groups in non-describing characteristic. Rock blocks are certain combinatorially defined blocks appearing in such a representation theory, first observed by R. Rouquier. Rock blocks are much more symmetric than general blocks, and every block is derived equivalent to a Rock block. Motivated by a theorem of J. Chuang and R. Kessar in the case of symmetric group blocks of abelian defect, the author pursues a structure theorem for these blocks.