Results 31 to 40 of about 14,489,673 (236)

A Historical Analysis of The Padovan Sequence

open access: yesInternational Journal of Trends in Mathematics Education Research, 2020
In the present text, we present some possibilities to formalize the mathematical content and a historical context, referring to a numerical sequence of linear and recurrent form, known as Sequence of Padovan or Cordonnier.
Renata Passos Machado Vieira   +2 more
doaj   +1 more source

The Filippov characteristic flow for the aggregation equation with mildly singular potentials [PDF]

open access: yes, 2014
Existence and uniqueness of global in time measure solution for the multidimensional aggregation equation is analyzed. Such a system can be written as a continuity equation with a velocity field computed through a self-consistent interaction potential ...
Carrillo, José Antonio   +3 more
core   +4 more sources

The Characteristic Equation

open access: yes, 2023
AbstractThis chapter is devoted to compact graphs formed by a finite number of bounded intervals. We already know that the spectrum of the corresponding magnetic Schrödinger operator is discrete and our main goal is to obtain characteristic equations determining the spectrum (eigenvalues) precisely. We describe here three different methods to obtain an
openaire   +1 more source

Maxwell’s Mixing Equation Revisited: Characteristic Impedance Equations for Ellipsoidal Cells [PDF]

open access: yesBiophysical Journal, 2015
We derived a series of, to our knowledge, new analytic expressions for the characteristic features of the impedance spectra of suspensions of homogeneous and single-shell spherical, spheroidal, and ellipsoidal objects, e.g., biological cells of the general ellipsoidal shape.
Stubbe, Marco, Gimsa, Jan
openaire   +2 more sources

Characteristic Surface Data for the Eikonal Equation

open access: yes, 1998
A method of solving the eikonal equation, in either flat or curved space-times, with arbitrary Cauchy data, is extended to the case of data given on a characteristic surface. We find a beautiful relationship between the Cauchy and characteristic data for
Newman, Ezra T., Perez, Alejandro
core   +1 more source

Light Beams Distortion in Nonlinear Electrodynamics [PDF]

open access: yes, 1998
We obtain the characteristic equation for the nonlinear Born-Infeld electrodynamics. This equation has the form of the characteristic equation for the linear electrodynamics in some effective Riemann space.
Chernitskii, Alexander A.
core   +2 more sources

Asymptotic Behavior and Stability in Linear Impulsive Delay Differential Equations with Periodic Coefficients

open access: yesMathematics, 2020
We study first order linear impulsive delay differential equations with periodic coefficients and constant delays. This study presents some new results on the asymptotic behavior and stability.
Ali Fuat Yeniçerioğlu   +2 more
doaj   +1 more source

Damage Detection of Axially Loaded Beam: A Frequency-Based Method [PDF]

open access: yesCivil Engineering Infrastructures Journal, 2016
The present study utilizes an analytical method to formulate the three lowest modal frequencies of axially-loaded notched beam through both crack location and load level in a specific format that can be used in existing frequency-based crack ...
Omid Rezaifar   +1 more
doaj   +1 more source

On decisions of Schwartz' problem for J-analytic functions with the same Jordan basis of real and imaginary parts of J-matrix

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2016
Boundary Schwartz' problem for J-analytic functions was studied within this scientific work. These functions are solutions of linear complex system of partial differential equations of the first order. It was considered, that the real and imaginary parts
Vladimir G Nikolaev
doaj   +1 more source

Formation of Small-Scale Condensations in the Molecular Clouds via Thermal Instability

open access: yes, 2006
A systematic study of the linear thermal instability of a self-gravitating magnetic molecular cloud is carried out for the case when the unperturbed background is subject to local expansion or contraction.
A.E. Glassgold   +29 more
core   +3 more sources

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