Global Regularity for the Yang-Mills Equations on High Dimensional Minkowski Space

Global Regularity for the Yang-Mills Equations on High Dimensional Minkowski Space

Author: Joachim Krieger

Publisher: American Mathematical Soc.

Published: 2013-04-22

Total Pages: 111

ISBN-13: 082184489X

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This monograph contains a study of the global Cauchy problem for the Yang-Mills equations on $(6+1)$ and higher dimensional Minkowski space, when the initial data sets are small in the critical gauge covariant Sobolev space $\dot{H}_A^{(n-4)/{2}}$. Regularity is obtained through a certain ``microlocal geometric renormalization'' of the equations which is implemented via a family of approximate null Cronstrom gauge transformations. The argument is then reduced to controlling some degenerate elliptic equations in high index and non-isotropic $L^p$ spaces, and also proving some bilinear estimates in specially constructed square-function spaces.


Elliptic Partial Differential Equations with Almost-Real Coefficients

Elliptic Partial Differential Equations with Almost-Real Coefficients

Author: Ariel Barton

Publisher: American Mathematical Soc.

Published: 2013-04-22

Total Pages: 120

ISBN-13: 0821887408

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In this monograph the author investigates divergence-form elliptic partial differential equations in two-dimensional Lipschitz domains whose coefficient matrices have small (but possibly nonzero) imaginary parts and depend only on one of the two coordinates. He shows that for such operators, the Dirichlet problem with boundary data in $L^q$ can be solved for $q1$ small enough, and provide an endpoint result at $p=1$.


Strange Attractors for Periodically Forced Parabolic Equations

Strange Attractors for Periodically Forced Parabolic Equations

Author: Kening Lu

Publisher: American Mathematical Soc.

Published: 2013-06-28

Total Pages: 97

ISBN-13: 0821884840

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The authors prove that in systems undergoing Hopf bifurcations, the effects of periodic forcing can be amplified by the shearing in the system to create sustained chaotic behavior. Specifically, strange attractors with SRB measures are shown to exist. The analysis is carried out for infinite dimensional systems, and the results are applicable to partial differential equations. Application of the general results to a concrete equation, namely the Brusselator, is given.


The Sine-Gordon Equation in the Semiclassical Limit: Dynamics of Fluxon Condensates

The Sine-Gordon Equation in the Semiclassical Limit: Dynamics of Fluxon Condensates

Author: Robert J. Buckingham

Publisher: American Mathematical Soc.

Published: 2013-08-23

Total Pages: 148

ISBN-13: 0821885456

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The authors study the Cauchy problem for the sine-Gordon equation in the semiclassical limit with pure-impulse initial data of sufficient strength to generate both high-frequency rotational motion near the peak of the impulse profile and also high-frequency librational motion in the tails. They show that for small times independent of the semiclassical scaling parameter, both types of motion are accurately described by explicit formulae involving elliptic functions. These formulae demonstrate consistency with predictions of Whitham's formal modulation theory in both the hyperbolic (modulationally stable) and elliptic (modulationally unstable) cases.


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.


On Central Critical Values of the Degree Four $L$-Functions for GSp(4): The Fundamental Lemma. III

On Central Critical Values of the Degree Four $L$-Functions for GSp(4): The Fundamental Lemma. III

Author: Masaaki Furusawa

Publisher: American Mathematical Soc.

Published: 2013-08-23

Total Pages: 150

ISBN-13: 0821887424

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Some time ago, the first and third authors proposed two relative trace formulas to prove generalizations of Böcherer's conjecture on the central critical values of the degree four -functions for , and proved the relevant fundamental lemmas. Recently, the first and second authors proposed an alternative third relative trace formula to approach the same problem and proved the relevant fundamental lemma. In this paper the authors extend the latter fundamental lemma and the first of the former fundamental lemmas to the full Hecke algebra. The fundamental lemma is an equality of two local relative orbital integrals. In order to show that they are equal, the authors compute them explicitly for certain bases of the Hecke algebra and deduce the matching.


Isolated Involutions in Finite Groups

Isolated Involutions in Finite Groups

Author: Rebecca Waldecker

Publisher: American Mathematical Soc.

Published: 2013-10-23

Total Pages: 164

ISBN-13: 082188803X

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This text provides a new proof of Glauberman's Z*-Theorem under the additional hypothesis that the simple groups involved in the centraliser of an isolated involution are known simple groups.