Results 31 to 40 of about 306,083 (278)

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

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

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

Quantum theta functions and Gabor frames for modulation spaces [PDF]

open access: yes, 2008
Representations of the celebrated Heisenberg commutation relations in quantum mechanics and their exponentiated versions form the starting point for a number of basic constructions, both in mathematics and mathematical physics (geometric quantization ...
A. Connes   +41 more
core   +4 more sources

Bifurcation of periodic solutions to the singular Yamabe problem on spheres [PDF]

open access: yes, 2015
We obtain uncountably many periodic solutions to the singular Yamabe problem on a round sphere, that blow up along a great circle. These are (complete) constant scalar curvature metrics on the complement of $S^1$ inside $S^m$, $m\geq 5$, that are ...
Bettiol, Renato G.   +2 more
core   +1 more source

Mathematical Modeling of Boson–Fermion Stars in the Generalized Scalar–Tensor Theories of Gravity [PDF]

open access: yesJournal of Computational Physics, 2001
16 pages, amstex, 5 figures, changed ...
Boyadjiev, T. L.   +3 more
openaire   +2 more sources

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

A framework for the natures of negativity in introductory physics [PDF]

open access: yes, 2019
Mathematical reasoning skills are a desired outcome of many introductory physics courses, particularly calculus-based physics courses. Positive and negative quantities are ubiquitous in physics, and the sign carries important and varied meanings. Novices
Boudreaux, Andrew   +3 more
core   +4 more sources

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

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