Results 71 to 80 of about 2,326,589 (197)

Prediction of the Expansion of the Universe Made by Alexander Friedmann and the Effect of Particle Creation in Cosmology

Universe
This review devoted to the centenary of Alexander Friedmann’s prediction of the Universe expansion presents the results obtained by him in 1922 and 1924 and an overview of their further developments.
Vladimir M. Mostepanenko
doaj   +1 more source

Spin-charge separation for paired Dirac fermions in (1 + 1) dimensions

Journal of High Energy Physics
We study Dirac fermions at finite density coupled to a complex pairing field assumed to obey scalar field theory with quartic self-repulsion. The bulk of our work develops the mathematics that elucidates the propagation of fermionic excitations in such ...
Laith H. Haddad
doaj   +1 more source

Octonion-valued $ b $-metric spaces and results on its application

AIMS Mathematics
This study introduces octonion-valued b-metric spaces as a natural extension of the octonion-valued metric spaces developed by establishing a partial ordering relation on octonions.
Xiu-Liang Qiu, Selim Çetin, Ömer Kişi, Mehmet Gürdal, Qing-Bo Cai   +4 more
doaj   +1 more source

An Eigenvalue‐Based Framework for Constraining Anisotropic Eddy Viscosity

Journal of Advances in Modeling Earth Systems
Eddy viscosity is employed throughout the majority of numerical fluid dynamical models, and has been the subject of a vigorous body of research spanning a variety of disciplines.
Scott D. Bachman
doaj   +1 more source

Shape operator of an $ (n-1) $-dimensional distribution on an $ n $-dimensional manifold and their classification [PDF]

ریاضی و جامعه
This paper aims to study of shape operator of an $ (n-1) $-dimensional distribution on an $ n $-dimensional smooth manifold. In this study firstly we state formulae for the shape operator and its symmetric and anti-symmetric components and in ...
Mehran Aminian, Mehran Namjoo
doaj   +1 more source

A Global Approach with Cutoff Exponential Function, Mathematically Well Defined at the Outset, for Calculating the Casimir Energy: The Example of Scalar Field [PDF]

, 2010
Milton Souza Ribeiro Miltão, Franz A. Farias   +1 more
openalex   +1 more source

Measurement invairance and construct validity of the Turkish version of the learner autonomy scale in a sample of high and secondary school students

International Journal of Contemporary Educational Research
The goal of this research is to adapt the 24-item "Learner Autonomy Scale" developed by Sereti and Giossos (2018) in higher education samples into Turkish by examining the psychometric properties of high school and secondary school samples, and to ...
Emrullah Deniz, Hilal Kazu
doaj   +1 more source

Symmetry Classification of First Integrals for Scalar Linearizable Second-Order ODEs

Journal of Applied Mathematics, 2012
Symmetries of the fundamental first integrals for scalar second-order ordinary differential equations (ODEs) which are linear or linearizable by point transformations have already been obtained.
K. S. Mahomed, E. Momoniat
semanticscholar   +1 more source

Symmetric Spaces in Supergravity

, 2008
We exploit the relation among irreducible Riemannian globally symmetric spaces (IRGS) and supergravity theories in 3, 4 and 5 space-time dimensions.
Ferrara, S., Marrani, A.
core  

Hybrid optimization technique for matrix chain multiplication using Strassen’s algorithm [version 1; peer review: 2 approved, 1 approved with reservations]

F1000Research
Background Matrix Chain Multiplication (MCM) is a fundamental problem in computational mathematics and computer science, often encountered in scientific computing, graphics, and machine learning.
Srinivasarao Thota, Rakshitha T, Thulasi Bikku   +2 more
doaj   +1 more source