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We describe optimal robust algorithms for finding a triangle and the unweighted girth in a unit disk graph, as well as finding a triangle in a transmission graph.In the robust setting, the input is not given as a set of sites in the plane,…

计算几何 · 计算机科学 2024-05-03 Katharina Klost , Wolfgang Mulzer

The presence of a high number of zero flow trades continues to provide a challenge in identifying gravity parameters to explain international trade using the gravity model. Linear regression with a logarithmic linear equation encounters an…

综合经济学 · 经济学 2023-08-15 Mikrajuddin Abdullah

The non-gravitational energy feedback is of crucial importance in modeling/simulating clusters to be used as cosmological probes. AGNs are, arguably, of primary importance in injecting energy in the cluster cores. We make the first estimate…

宇宙学与河外天体物理 · 物理学 2015-06-12 Anya Chaudhuri , Subhabrata Majumdar , Biman B. Nath

We have constructed gravity solutions by breaking the Lorentzian symmetry to its subgroup, which means there is Galilean symmetry but without the rotational and boost invariance. This solution shows anisotropic behavior along both the…

高能物理 - 理论 · 物理学 2010-10-26 Shesansu Pal

In this paper, analytical solutions describing static and spherically symmetric sources in the decoupling limit of massive gravity are derived. We analyze the model parameter range and specify when a Vainshtein mechanism is possible.…

广义相对论与量子宇宙学 · 物理学 2011-11-28 Stefan Sjors , Edvard Mortsell

In the average action approach to the quantization of gravity the fundamental requirement of "background independence" is met by actually introducing a background metric but leaving it completely arbitrary. The associated Wilsonian…

广义相对论与量子宇宙学 · 物理学 2010-03-02 Elisa Manrique , Martin Reuter

In previous work, the Lorentzian proper vertex amplitude for a spin-foam model of quantum gravity was derived. In the present work, the asymptotics of this amplitude are studied in the semi-classical limit. The starting point of the…

广义相对论与量子宇宙学 · 物理学 2016-09-14 Jonathan Engle , Ilya Vilensky , Antonia Zipfel

The f(T) gravity is nowadays being widely used for cosmological model building, as well as for constructing spherically symmetric solutions. In its classical pure tetrad formulation it violates the local Lorentz symmetry in the space of…

广义相对论与量子宇宙学 · 物理学 2021-09-24 Alexey Golovnev

Due to common architecture designs, symmetries exist extensively in contemporary neural networks. In this work, we unveil the importance of the loss function symmetries in affecting, if not deciding, the learning behavior of machine…

机器学习 · 计算机科学 2024-06-04 Liu Ziyin

Gravitational properties of a hedge-hog type topological defect in two extra dimensions are considered in General Relativity employing a vector as the order parameter. All previous considerations were done using the order parameter in the…

广义相对论与量子宇宙学 · 物理学 2010-11-02 Boris E. Meierovich

This paper introduces a new algorithm for accurately reconstructing two smooth orthogonal surfaces by processing ultrasonic data. The proposed technique is based on a preliminary analysis of a waveform energy indicator in order to classify…

机器人学 · 计算机科学 2014-01-22 Nicola Ivan Giannoccaro , Giovanni Indiveri , Luigi Spedicato

These are intended to be review notes on emergent symmetries, i.e., symmetries which manifest themselves in specific sectors of energy in many systems. The emphasis is on the physical aspects rather than computation methods. We include some…

高能物理 - 理论 · 物理学 2016-03-17 Pedro R. S. Gomes

We analyze the classical equations of motion for a particle moving in the presence of a static magnetic field applied in the $ z $ direction, which varies as $ {1\over{x^2}} $. We find the symmetries through Lie's method of group analysis.…

数学物理 · 物理学 2007-05-23 Karmadeva Maharana

Given a large number of covariates $Z$, we consider the estimation of a high-dimensional parameter $\theta$ in an individualized linear threshold $\theta^T Z$ for a continuous variable $X$, which minimizes the disagreement between…

统计理论 · 数学 2019-05-28 Huijie Feng , Yang Ning , Jiwei Zhao

Although consistency is a minimum requirement of any estimator, little is known about consistency of the mean partition approach in consensus clustering. This contribution studies the asymptotic behavior of mean partitions. We show that…

机器学习 · 计算机科学 2015-12-21 Brijnesh Jain

An usual problem in statistics consists in estimating the minimizer of a convex function. When we have to deal with large samples taking values in high dimensional spaces, stochastic gradient algorithms and their averaged versions are…

统计理论 · 数学 2022-01-12 Antoine Godichon-Baggioni

Centering is a commonly used technique in linear regression analysis. With centered data on both the responses and covariates, the ordinary least squares estimator of the slope parameter can be calculated from a model without the intercept.…

统计方法学 · 统计学 2022-10-04 HaiYing Wang

This paper concerns models and convergence principles for dealing with stochasticity in a wide range of algorithms arising in nonlinear analysis and optimization in Hilbert spaces. It proposes a flexible geometric framework within which…

最优化与控制 · 数学 2026-02-17 Patrick L. Combettes , Javier I. Madariaga

The modified $F(R)$ gravity theory with the function $F(R)=-(1/\beta)\ln(1-\beta R)$ is studied. The action at small coupling $\beta$ becomes Einstein--Hilbert action. The bound on the parameter $\beta$ from local tests is $\beta\leq…

综合物理 · 物理学 2023-04-19 S. I. Kruglov

This paper investigates the robust stability problem of a feedback system in the presence of uncertainties induced by graphical regions in the plane where the scaled relative graphs (SRGs) reside. Our main results are developed using a…

系统与控制 · 电气工程与系统科学 2026-04-15 Ding Zhang , Di Zhao , Philipp Braun , Jianqi Chen