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The full causal ladder of spacetimes is constructed, and their updated main properties are developed. Old concepts and alternative definitions of each level of the ladder are revisited, with emphasis in minimum hypotheses. The implications…

General Relativity and Quantum Cosmology · Physics 2008-05-20 E. Minguzzi , M. Sanchez

We consider the general question of when all orbits under the unitary action of a finite group give a complex spherical design. Those orbits which have large stabilisers are then good candidates for being optimal complex spherical designs.…

Combinatorics · Mathematics 2024-04-03 Mozhgan Mohammadpour , Shayne Waldron

We study fundamental groups of clique complexes associated to random graphs. We establish thresholds for their cohomological and geometric dimension and torsion. We also show that in certain regime any aspherical subcomplex of a random…

Algebraic Topology · Mathematics 2015-06-12 Armindo Costa , Michael Farber , Danijela Horak

A completely reducible subcomplex of a spherical building is a spherical building.

Metric Geometry · Mathematics 2010-10-04 Linus Kramer

We are interested in the development of spherically symmetric geometries in $F(T)$ teleparallel gravity which are of physical importance. We first express the general forms for the spherically symmetric frame and the zero curvature, metric…

General Relativity and Quantum Cosmology · Physics 2024-04-01 A. A. Coley , A. Landry , R. J. van den Hoogen , D. D. McNutt

This is a survey on recent results on the Loewner theory in one and several complex manifolds

Complex Variables · Mathematics 2011-12-14 Filippo Bracci

A stochastic dynamics framework for the study of complex systems is presented.

Statistical Mechanics · Physics 2007-05-23 L. S. Schulman , B. Gaveau

We show that every valued differential field has an immediate strict extension that is spherically complete. We also discuss the issue of uniqueness up to isomorphism of such an extension.

Commutative Algebra · Mathematics 2018-04-18 Matthias Aschenbrenner , Lou van den Dries , Joris van der Hoeven

We give a reformulation of the inverse shadowing property with respect to the class of all pseudo-orbits. This reformulation bears witness to the fact that the property is far stronger than might initially seem. We give some implications of…

Dynamical Systems · Mathematics 2020-03-11 Chris Good , Joel Mitchell , Joe Thomas

In this article we consider the homotopy theory of stratified spaces through a simplicial point of view. We first consider a model category of filtered simplicial sets over some fixed poset $P$, and show that it is a simplicial…

Algebraic Topology · Mathematics 2020-03-24 Sylvain Douteau

This paper extends the model reduction method by the operator projection to the three-dimensional special relativistic Boltzmann equation. The derivation of arbitrary order moment system is built on our careful study of infinite families of…

Numerical Analysis · Mathematics 2017-05-12 Yangyu Kuang , Huazhong Tang

We decompose the discrete bilinear spherical averaging operator into simpler operators in several ways. This leads to a wide array of extensions, such as to the simplex averaging operator, and applications, such as to operator bounds.

Classical Analysis and ODEs · Mathematics 2023-06-27 Theresa C. Anderson , Angel V. Kumchev , Eyvindur A. Palsson

A general analytic spherically symmetric solution of the Bogomol'nyi equations is found. It depends on two constants and one arbitrary function on radius and contains the Bogomol'nyi-Prasad-Sommerfield and Singleton solutions as particular…

General Physics · Physics 2021-10-25 M. O. Katanaev

We study the stochastic dynamics of Ising spin models with random bonds, interacting on finitely connected Poissonnian random graphs. We use the dynamical replica method to derive closed dynamical equations for the joint spin-field…

Disordered Systems and Neural Networks · Physics 2009-11-13 A. Mozeika , A. C. C. Coolen

An axiomatic approach to the mathematical models of the isotropic cosmology.

General Relativity and Quantum Cosmology · Physics 2016-05-23 Sergio Benenti

We consider generalized versions of the massless spin-boson model. Building on the recent work in 'Approach to ground state and time-independent photon bound for massless spin-boson models' (arXiv:1109.5582, Annales H. Poincare, 2012) and…

Mathematical Physics · Physics 2013-01-14 W. De Roeck , M. Griesemer , A. Kupiainen

We give a brief review of holomorphic motions and its relation with quasiconformal mapping theory. Furthermore, we apply the holomorphic motions to give new proofs of famous Konig's Theorem and Bottcher's Theorem in classical complex…

Dynamical Systems · Mathematics 2020-06-02 Yunping Jiang

This paper is based on the lectures given by the first author at Harvard in February and March, 2009. It begins with an introduction to the classical p-adic theory of the Macdonald, Matsumoto and Whittaker functions. Its major directions…

Quantum Algebra · Mathematics 2012-10-30 Ivan Cherednik , Xiaoguang Ma

We study the early-time behavior of isotropic and homogeneous solutions in vacuum as well as radiation-filled cosmological models in the full, effective, four dimensional gravity theory with higher derivatives. We use asymptotic methods to…

General Relativity and Quantum Cosmology · Physics 2017-06-06 Georgios Kolionis

Using the dynamical systems approach together with the cosmographic parameters, we present a model-independent dynamical system formulation for cosmology in f(R) gravity. The formulation is model-independent in the sense that one needs to…

General Relativity and Quantum Cosmology · Physics 2024-12-31 A. S. Agrawal , Charlotte Louw , Saikat Chakraborty , Peter K. S. Dunsby
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