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We consider a relativistic spherical shell and calculate its spectral flux as received by a distant observer. Using two different methods, we derive a simple analytical expression of the observed spectral flux and show that the well-known…

High Energy Astrophysical Phenomena · Physics 2015-08-06 Z. Lucas Uhm , Bing Zhang

We summarize recent results initiating spectral analysis on pseudo-Riemannian locally symmetric spaces $\Gamma \backslash G/H$, beyond the classical setting where $H$ is compact (e.g. theory of automorphic forms for arithmetic $\Gamma$) or…

Spectral Theory · Mathematics 2021-06-16 Fanny Kassel , Toshiyuki Kobayashi

In this short notice we give a universal definition of $\Z_2$-module $Or(\Gamma)$ of orientations of a graph $\Gamma$ and construct a method, by means of which one can easily verify whenever two such special definitions coincide.

Combinatorics · Mathematics 2007-05-23 Konstantin Salikhov

We study a variety of problems in the spectral theory of automorphic forms using entirely analytic techniques such as Selberg trace formula, asymptotics of Whittaker functions and behavior of heat kernels. Error terms for Weyl's law and an…

High Energy Physics - Theory · Physics 2007-05-23 Sultan Catto , Jonathan Huntley , Nam-Jong Moh , David Tepper

The aim of superstring phenomenology is to develop the tools and methodology needed to confront string theory with experimental data. The first mandatory task is to find string solutions which reproduce the observable data. The subsequent…

High Energy Physics - Phenomenology · Physics 2011-07-19 G. B. Cleaver , A. E. Faraggi , D. V. Nanopoulos , T. ter Veldhuis

A well-known principle states that a congruence between objects should give rise to a corresponding congruence between the special values of $L$-functions attached to these objects. We computationally investigate this principle for…

Number Theory · Mathematics 2026-03-12 P. Narayanan , A. Raghuram

In this paper we present a combinatorial proof of Selberg's integral formula. We start by giving a bijective proof of a Theorem about the number of topological orders of a certain related directed graph. Selberg's Integral Formula then…

Combinatorics · Mathematics 2020-05-19 Alexander Haupt

This article investigates the traces of certain modules over rings of invariants associated with finite groups. More precisely, we provide a formula for computing the traces of arbitrary semi-invariants, thereby contributing to the…

Commutative Algebra · Mathematics 2023-12-05 Ela Celikbas , Jürgen Herzog , Shinya Kumashiro

We give a constructive, metastable formulation of a theorem about the exchange of limits for convergent sequence $L^1$ functions. A crucial tool is a one-dimensional version of Szemeredi's regularity lemma for $L^1$ functions.

Logic · Mathematics 2015-03-17 Henry Towsner

The standard twist of $L$-functions plays a fundamental role in the Selberg class theory. It is defined as an absolutely convergent Dirichlet series and admits meromorphic continuation beyond the half-plane of absolute convergence.…

Number Theory · Mathematics 2026-03-17 Jerzy Kaczorowski , Alberto Perelli

The Segal conjecture describes stable maps between classifying spaces in terms of (virtual) bisets for the finite groups in question. Along these lines, we give an algebraic formula for the p-completion functor applied to stable maps…

Algebraic Topology · Mathematics 2022-01-11 Sune Precht Reeh , Tomer M. Schlank , Nathaniel Stapleton

This communication shows the track for finding a solution for a sin(kx)/k**2 series and a fresh representation for the Euler's Gamma function in terms of Riemann's Zeta function. We have found a new series expression for the logarithm as a…

General Mathematics · Mathematics 2013-08-13 Henrik Stenlund

Let $\Gamma$ be a convex cocompact thin subgroup of an arithmetic lattice in $\operatorname{SO}(n, 1)$. We generalize Selberg's $\frac{3}{16}$ theorem in this setting, i.e., we prove uniform exponential mixing of the frame flow and obtain a…

Dynamical Systems · Mathematics 2024-06-28 Pratyush Sarkar

Let G be a semisimple Lie group without compact factors, \Gamma be an irreducible lattice in G. In the first part of the article we give the necessary and sufficient condition under which a sequence of translates of probability…

Dynamical Systems · Mathematics 2013-09-11 Amir Mohammadi , Alireza Salehi Golsefidy

In this paper the Serre spectral sequence of Moerdijk and Svensson is extended from Bredon cohomology to RO(G)-graded cohomology for finite groups G. Special attention is paid to the case G=Z/2 where the spectral sequence is used to compute…

Algebraic Topology · Mathematics 2009-08-27 William C. Kronholm

We combine several mini miracles to achieve an elementary understanding of infinite loop spaces and very effective spectra in the algebro-geometric setting of motivic homotopy theory. Our approach combines $\Gamma$-spaces and framed…

Algebraic Geometry · Mathematics 2022-04-22 Grigory Garkusha , Ivan Panin , Paul Arne Østvær

Diagram-chasing arguments frequently lead to "magical" relations between distant points of diagrams: exactness implications, connecting morphisms, etc.. These long connections are usually composites of short "unmagical" connections, but the…

Category Theory · Mathematics 2013-05-10 George M. Bergman

We consider the nonlinear stationary Schr\"odinger equation \begin{equation*} -\Delta u -\lambda u= Q(x)|u|^{p-2}u, \qquad \text{in }\mathbb{R}^N \end{equation*} in the case where $N \geq 3$, $p$ is a superlinear, subcritical exponent, $Q$…

Analysis of PDEs · Mathematics 2016-10-05 Gilles Evéquoz , Tobias Weth

We show that a compact operator $A$ is a multiple of a positive semi-definite operator if and only if $$ \sigma(AB) \subseteq \overline{W(A)W(B)}, \quad\text{for all (rank one) operators $B$}. $$ An example of a normal operator is given to…

Functional Analysis · Mathematics 2014-07-15 Chi-Kwong Li , Ming-Cheng Tsai , Kuo-Zhong Wang , Ngai-Ching Wong

We study the spectral functions, and in particular the zeta function, associated to a class of sequences of complex numbers, called of spectral type. We investigate the decomposability of the zeta function associated to a double sequence…

Differential Geometry · Mathematics 2009-05-17 Mauro Spreafico