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100 Glimpses : Braille Sports Car Rally
100 Glimpses is a series of short documentaries produced by the Sight Center of Northwest Ohio. The series explores the organization's history. The Sight Center was founded in 1923 as the Toledo Society for the Blind.
Sight Center of Northwest Ohio (Toledo, Ohio)
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100 Glimpses : Dr. Robert Goulding
100 Glimpses is a series of short documentaries produced by the Sight Center of Northwest Ohio. The series explores the organization's history. The Sight Center was founded in 1923 as the Toledo Society for the Blind.
Sight Center of Northwest Ohio (Toledo, Ohio)
core
100 Glimpses is a series of short documentaries produced by the Sight Center of Northwest Ohio. The series explores the organization's history. The Sight Center was founded in 1923 as the Toledo Society for the Blind.
Sight Center of Northwest Ohio (Toledo, Ohio)
core
100 Glimpses is a series of short documentaries produced by the Sight Center of Northwest Ohio. The series explores the organization's history. The Sight Center was founded in 1923 as the Toledo Society for the Blind.
Sight Center of Northwest Ohio (Toledo, Ohio)
core
100 Glimpses is a series of short documentaries produced by the Sight Center of Northwest Ohio. The series explores the organization's history. The Sight Center was founded in 1923 as the Toledo Society for the Blind.
Sight Center of Northwest Ohio (Toledo, Ohio)
core
A class of reversible cubic systems with an isochronous center [PDF]
Computers and Mathematics With Applications, 1999 We study cubic polynomial differential systems having an isochronous center and an inverse integrating factor formed by two different parallel invariant straight lines. Such systems are time-reversible.
Jaume Gine +2 more
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The isochronous center for Kukles homogeneous systems of degree eight
Applied Mathematics Letters, 2023Consider the planar polynomial system \[ \begin{array}{l} \frac{{dx}}{{dt}}= -y, \\ \frac{{dy}}{{dt}} = x+b_1xy^7+b_2x^3y^5+b_3x^5y^3+b_4x^7y \end{array}\tag{1} \] having the origin as unique equilibrium and whose phase portrait is symmetric with respect to the \(y\)-axis.
Yusen Wu
exaly +3 more sources
Isochronous Centers and Isochronous Functions
Acta Mathematicae Applicatae Sinica, 2002The author investigates the isochronous centers of two classes of planar systems of ordinary differential equations: 1) Liénard systems of the form \((\dot x)=y-F(x),(\dot y)=-g(x)\), 2) Hamiltonian systems of the form \((\dot x)=-g(y)\), \((\dot y)=f(x)\), with emphasis on the case when the functions \(g\) or \(f\) are isochronous. For the first class
exaly +3 more sources
Centers and Isochronous Centers of Liénard Systems
Differential Equations, 2019Holomorphic Liénard systems are studied. The authors give necessary and sufficient conditions for the existence of a center and an isochronous center which are obtained without calculating the focus quantities and the isochronicity constants.
Amel'kin, V. V., Rudenok, A. E.
openaire +1 more source
Isochronicity of centers at a center manifold
AIP Conference Proceedings, 2012For a three dimensional system with a center manifold filled with closed trajectories (corresponding to periodic solutions of the system) we give criteria on the coefficients of the system to distinguish between the cases of isochronous and non-isochronous oscillations. Bifurcations of critical periods of the system are studied as well.
Brigita Ferčec, Matej Mencinger
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