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This paper deals with some inequalities for trigonometric and hyperbolic functions such as the Jordan inequality and its generalizations. In particular, lower and upper bounds for functions such as (sin x)/x and x/(sinh x) are proved.

Classical Analysis and ODEs · Mathematics 2010-10-08 R. Klen , M. Visuri , M. Vuorinen

In this paper some concepts of convex analysis on hyperbolic space are studied. We first study properties of the intrinsic distance, for instance, we present the spectral decomposition of its Hessian. Next, we study the concept of convex…

Optimization and Control · Mathematics 2022-07-13 Orizon Pereira Ferreira , Sándor Zoltán Németh , Jinzhen Zhu

The computation of the partition function of supersymmetric gauge theories on compact manifolds can be reduced to matrix integrals by using the supersymmetric localization technique. Such matrix integrals in the case of three-dimensional…

High Energy Physics - Theory · Physics 2024-12-31 Mustafa Mullahasanoglu , Ali Mert T. Yetkin , Reyhan Yumusak

The theory of symmetric-hyperbolic systems is useful for constructing smooth solutions of nonlinear wave equations, and for studying their singularities, including shock waves. We present the main techniques which are required to apply the…

Analysis of PDEs · Mathematics 2025-07-10 Satyanad Kichenassamy

We use a combinatorial approximation of the hyperbolic plane to investigate properties of hyperbolic geometry such as exponential growth of perimeter and area of disks, and the linear isoperimetric inequality. This calculations give a…

Geometric Topology · Mathematics 2024-04-09 MurphyKate Montee

In this paper we study the convexity and concavity properties of generalized trigonometric and hyperbolic functions in case of Logarithmic mean.

Analysis of PDEs · Mathematics 2014-04-29 Barkat Ali Bhayo , Li Yin

Explicit representations of the eigenvalues of the peridynamic operator have been recently derived in [5]. These representations are given in terms of generalized hypergeometric functions. Asymptotic analysis of the hypergeometric functions…

Mathematical Physics · Physics 2023-08-21 Bacim Alali , Nathan Albin , Thinh Dang

In this article, existence results concerning temporal functions with additional properties on a globally hyperbolic manifold are obtained. These properties are certain bounds on geometric quantities as lapse and shift. The results are…

Differential Geometry · Mathematics 2016-05-20 Olaf Müller

Identities and inequalities for the cosine and sine functions are obtained.

Classical Analysis and ODEs · Mathematics 2020-01-13 Iosif Pinelis

The global additive and multiplicative properties of the Laplacian on j-forms and related zeta functions are analyzed. The explicit form of zeta functions on a product of closed oriented hyperbolic manifolds \Gamma\backslash{\Bbb H}^d and…

High Energy Physics - Theory · Physics 2015-06-26 A. A. Bytsenko , A. E. Goncalves , M. Simoes , F. L. Williams

Recently, hyperbolic lattices that tile the negatively curved hyperbolic plane emerged as a new paradigm of synthetic matter, and their energy levels were characterized by a band structure in a four- (or higher-)dimensional momentum space.…

Mesoscale and Nanoscale Physics · Physics 2023-01-10 David M. Urwyler , Patrick M. Lenggenhager , Igor Boettcher , Ronny Thomale , Titus Neupert , Tomáš Bzdušek

We consider hyperbolic projections of orbits of holomorphic self-maps of the unit disc, onto curves landing on the unit circle with a given angle. We show that under certain, necessary, assumptions, the projections exhibit monotonicity…

Complex Variables · Mathematics 2025-06-25 Argyrios Christodoulou , Konstantinos Zarvalis

In this paper we define the analytic torsion for a complete oriented hyperbolic manifold of finite volume. It depends on a representation of the fundamental group. For manifolds of odd dimension, we study the asymptotic behavior of the…

Spectral Theory · Mathematics 2011-10-19 Werner Mueller , Jonathan Pfaff

We characterize the complete monotonicity of the Kilbas-Saigo function on the negative half-line. We also provide the exact asymptotics at $-\infty$, and uniform hyperbolic bounds are derived. The same questions are addressed for the…

Classical Analysis and ODEs · Mathematics 2020-12-11 Lotfi Boudabsa , Thomas Simon

In this paper, an open problem in the multidimensional complex analysis is pesented that arises in the investigation of the regularity properties of Fourier integral operators and in the regularity theory for hyperbolic partial differential…

Analysis of PDEs · Mathematics 2013-03-21 Michael Ruzhansky

In this expository article, we discuss various monotonicity formulas for parabolic and elliptic operators and explain how the analysis of the function spaces and the geometry of the underlining spaces are intertwined. After briefly…

Differential Geometry · Mathematics 2012-06-11 Tobias Holck Colding , William P. Minicozzi

In this paper, we have defined bicomplex valued functions of bounded variations and rectifiable hyperbolic path. We have studied the integration of product-type bicomplex functions over rectifiable hyperbolic path. Also we have established…

Complex Variables · Mathematics 2024-01-18 Chinmay Ghosh , Soumen Mondal

We study a class of two dimensional partially hyperbolic systems, not necessarily skew products, trying to establish the germ of a general theory. To illustrate the scope of the theory, we apply our results to the case of fast-slow…

Dynamical Systems · Mathematics 2022-02-23 Roberto Castorrini , Carlangelo Liverani

Some integrals of matrix spaces over a quaternionic field have been calculated in this work. The associated volume of hyperbolic matrix spaces over a quaternionic field has also been calculated by making use of these integrals, and it is of…

Mathematical Physics · Physics 2016-08-03 Fu-Wen Shu , You-Gen Shen

We study harmonic functions for the Laplace-Beltrami operator on the real hyperbolic ball. We obtain necessary and sufficient conditions for this functions and their normal derivatives to have a boundary distribution.In doing so, we put…

Classical Analysis and ODEs · Mathematics 2007-05-23 Philippe Jaming