Results 81 to 90 of about 716,407 (270)
Mathematical Analysis of a Generalized Chiral Quark Soliton Model
Symmetry, Integrability and Geometry: Methods and Applications, 2006 A generalized version of the so-called chiral quark soliton model (CQSM) in nuclear physics is introduced. The Hamiltonian of the generalized CQSM is given by a Dirac type operator with a mass term being an operator-valued function.
Asao Arai
doaj
Twistors, the ASD Yang-Mills equations and 4d Chern-Simons theory
Journal of High Energy Physics, 2023 We show that the approaches to integrable systems via 4d Chern-Simons theory and via symmetry reductions of the anti-self-dual Yang-Mills equations are closely related, at least classically.
Roland Bittleston, David Skinner
doaj +1 more source
PDEs reduction and \(lambda\)-symmetries
, 2004 Lie symmetry theory provide us, via symmetry reductions, with one of the most important approaches to the explicit construction of closed-form solutions for nonlinear differential equations. For ordinary differential equations \textit{C. Muriel} and \textit{J. L. Romero} [IMA J. Appl. Math. 66, No.
G. Gaeta, P. Morando
openaire +4 more sources
Portable Low‐Field Magnetic Resonance Imaging in People With Human Immunodeficiency Virus
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective The aging population of people with HIV (PWH) raises heightened concerns regarding accelerated aging and dementia. Portable, low‐field MRI (LF‐MRI) is an innovative technology that could enhance access and facilitate routine monitoring of PWH.
Annabel Sorby‐Adams +14 more
wiley +1 more source
Mathematical Modelling and Analysis, 2017 In this paper, we first compute the multiple non-trivial solutions of the Schrodinger equation on a unit disk, by using the Liapunov-Schmidt reduction and symmetry-breaking bifurcation theory, combined with the mixed Fourier-Legendre spectral and ...
Zhao-Xiang Li, Ji Lao, Zhong-Qing Wang
doaj +1 more source
Numerical Simulation and Symmetry Reduction of a Two-Component Reaction-Diffusion System
Advances in Mathematical Physics, 2020 In this paper, the symmetry classification and symmetry reduction of a two-component reaction-diffusion system are investigated, the reaction-diffusion system can be reduced to system of ordinary differential equations, and the solutions and numerical ...
Jina Li, Xuehui Ji
doaj +1 more source
Nonholonomic systems with symmetry allowing a conformally symplectic reduction
, 2002 Non-holonomic mechanical systems can be described by a degenerate almost-Poisson structure (dropping the Jacobi identity) in the constrained space. If enough symmetries transversal to the constraints are present, the system reduces to a nondegenerate ...
AJ Schaft Van Der +7 more
core +1 more source
Involution and symmetry reductions
Mathematical and Computer Modelling, 1997 The author discusses the completion of a system of differential equations to an involutive one. Applications of the concept of involution to symmetry theory are considered. The author studies local solvability of differential equations, gauge symmetry, and reduction of a system of ordinary differential equations.
openaire +4 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is an immune‐mediated neuropathy featuring progressive weakness, sensory deficits, and areflexia. While corticosteroids, intravenous immunoglobulin, and plasmapheresis are effective first‐line immunotherapies, a subset of patients remains treatment‐refractory.
Xueyu Zhang +8 more
wiley +1 more source
First-principles modeling of the polycyclic aromatic hydrocarbons reduction
, 2011 Density functional theory modelling of the reduction of realistic nanographene molecules (C42H18, C48H18 and C60H24) by molecular hydrogen evidences for the presence of limits in the hydrogenation process.
Ao Z. M. +48 more
core +1 more source