Results 11 to 20 of about 11,048 (218)

On the Geometry of Three-dimensional Pseudo-Riemannian Homogeneous Spaces. I [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2020
The problem of establishing links between the curvature and the topological structure of a manifold is one of the important problems of geometry. In general, the purpose of the research of manifolds of various types is rather complicated.
Natal’ya Pavlovna Mozhey
doaj   +1 more source

Aperture referral in dioptric systems with stigmatic elements

open access: yesAfrican Vision and Eye Health, 2012
A previous paper develops the general theory of aperture referral in linear optics and shows how several ostensibly distinct concepts, including the blur patch on the retina, the effective corneal patch, the projective field and the field of view, are ...
W. F. Harris
doaj   +1 more source

On the Geometry of Three-dimensional Pseudo-Riemannian Homogeneous Spaces. II [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2020
The problem of establishing links between the curvature and the topological structure of a manifold is one of the important problems of the geometry. In general, the purpose of the research of manifolds of various types is rather complicated.
Mozhey, Natal’ya Pavlovna
doaj   +1 more source

Riccati equations

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1987
In this paper we find closed form solutions of some Riccati equations. Attention is restricted to the scalar as opposed to the matrix case. However, the ones considered have important applications to mathematics and the sciences, mostly in the form of ...
Lloyd K. Williams
doaj   +1 more source

Measurement of job motivation in TEDS-M: testing for invariance across countries and cultures

open access: yesLarge-scale Assessments in Education, 2016
The paper presents the challenges of cross-country and cross-cultural research on the motivation to become a mathematics teacher based on data from the “Teacher Education and Development Study in Mathematics (TEDS-M)”.
Christin Laschke, Sigrid Blömeke
doaj   +1 more source

Spacetime Paths as a Whole

open access: yesQuantum Reports, 2020
The mathematical similarities between non-relativistic wavefunction propagation in quantum mechanics and image propagation in scalar diffraction theory are used to develop a novel understanding of time and paths through spacetime as a whole.
Sky Nelson-Isaacs
doaj   +1 more source

Calculus-enhanced energy-first curriculum for introductory physics improves student performance locally and in downstream courses

open access: yesPhysical Review Physics Education Research, 2019
Here we demonstrate the benefits of a new curriculum for introductory calculus-based physics that motivates classical mechanics using a modified version of Hamiltonian mechanics.
Sarah E. LeGresley   +4 more
doaj   +1 more source

On a boundary value problem for a Boussinesq-type equation in a triangle

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
Earlier, we considered an initial-boundary value problem for a one-dimensional Boussinesq-type equation in a domain that is a trapezoid, in which the theorems on its unique weak solvability in Sobolev classes were established by the methods of the theory
M. T. Jenaliyev   +2 more
doaj   +1 more source

Minkowski tensors of anisotropic spatial structure

open access: yesNew Journal of Physics, 2013
This paper describes the theoretical foundation of and explicit algorithms for a novel approach to morphology and anisotropy analysis of complex spatial structure using tensor-valued Minkowski functionals, the so-called Minkowski tensors .
G E Schröder-Turk   +6 more
doaj   +1 more source

The B-AIMT: development and initial validation of a domain-specific instrument for assessing mathematics teachers’ beliefs about artificial intelligence

open access: yesFrontiers in Education
This study presents the development of the Belief Scale for Artificial Intelligence in Mathematics Teaching (B-AIMT) and provides psychometric evidence for its initial validation as a domain-specific instrument assessing teachers’ beliefs about AI in ...
Nils Buchholtz   +14 more
doaj   +1 more source

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