Results 111 to 120 of about 519,259 (281)

2-step nilpotent Lie groups arising from semisimple modules [PDF]

arXiv, 2008
Every finite dimensional real representation of a compact real semisimple Lie algebra determines a metric 2-step nilpotent Lie algebra and a corresponding simply connected metric 2-step nilpotent Lie group N. We study the differential geometry of N using representation theory of the complexified complex semisimple Lie algebra.
arxiv  

The Generic Circular Triangle‐Free Graph

Journal of Graph Theory, EarlyView.
ABSTRACT In this article, we introduce the generic circular triangle‐free graph C 3 ${{\mathbb{C}}}_{3}$ and propose a finite axiomatization of its first‐order theory. In particular, our main results show that a countable graph G $G$ embeds into C 3 ${{\mathbb{C}}}_{3}$ if and only if it is a { K 3 , K 1 + 2 K 2 , K 1 + C 5 , C 6 } $\{{K}_{3},{K}_{1}+2{
Manuel Bodirsky, Santiago Guzmán‐Pro
wiley   +1 more source

Towards robust data-driven automated recovery of symbolic conservation laws from limited data

Machine Learning: Science and Technology
Conservation laws are an inherent feature in many systems modeling real world phenomena, in particular, those modeling biological and chemical systems. If the form of the underlying dynamical system is known, linear algebra and algebraic geometry methods
Tracey Oellerich, Maria Emelianenko
doaj   +1 more source

On local real algebraic geometry and applications to kinematics [PDF]

arXiv, 2019
We address the question of identifying non-smooth points in affine real algebraic varieties. A simple algebraic criterion will be formulated and proven. As an application we can answer several questions about the configuration spaces of some class of planar linkages.
arxiv  

Current Landscape of Short‐T2 Imaging Techniques in the Musculoskeletal System: The Past, Present and Future

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Conventional MRI is limited in imaging tissues with short T2 relaxation times, such as bone, ligaments, and cartilage, due to their rapid signal decay. This limitation has spurred the development of specialized MRI techniques designed specifically for short‐T2 tissue imaging.
Pranjal Rai, Amit Kumar Janu, Nitin Shetty, Suyash Kulkarni   +3 more
wiley   +1 more source

Magnetic neutron scattering from spherical nanoparticles with Néel surface anisotropy: analytical treatment

Journal of Applied Crystallography, Volume 55, Issue 6, Page 1475-1487, December 2022., 2022
The magnetization profile and the ensuing magnetic neutron scattering signal from an inhomogeneously magnetized spherical nanoparticle with Néel surface anisotropy are derived analytically.The magnetization profile and the related magnetic small‐angle neutron scattering cross section of a single spherical nanoparticle with Néel surface anisotropy are ...
Michael P. Adams, Andreas Michels, Hamid Kachkachi   +2 more
wiley   +1 more source

Surfaces with DIF$\ne$DEF real structures [PDF]

arXiv, 2005
We study real Campedelli surfaces up to real deformations and exhibit a number of such surfaces which are equivariantly diffeomorphic but not real deformation equivalent.
arxiv  

Survive the economic downturn: Operating flexibility, productivity, and stock crash

Journal of Operations Management, EarlyView.
Abstract Operating flexibility supports a firm's resilience strategy during challenging times by enabling them to promptly cut down operating costs associated with unproductive resources. We employ a real options model to formalize this insight. Our empirically grounding analytics motivate a firm‐level proxy for downscale operating flexibility (FLEX ...
Yang Li, Xiaojun Wang, Fangming Xu, Tuan Ho   +3 more
wiley   +1 more source

TomocuPy – efficient GPU‐based tomographic reconstruction with asynchronous data processing

Journal of Synchrotron Radiation, Volume 30, Issue 1, Page 179-191, January 2023., 2023
TomocuPy, a Python software package for fast 3D reconstruction on graphics processing units (GPUs) and modern storage drives supporting parallel read/write operations, is presented. The package demonstrates significant performance gain compared with analogs and can be efficiently used when processing data during experiments requiring steering of ...
Viktor Nikitin
wiley   +1 more source

An operad from the secondary polytope [PDF]

arXiv, 2015
We study the enumerative geometry of orbits of multidimensional toric action on projective algebraic varieties and develop a new cyclic differential-graded operad, conjecturally governing the real version of the enumerative geometry of these toric orbits.
arxiv