Results 31 to 40 of about 572,208 (300)

Matroid connectivity and singularities of configuration hypersurfaces

, 2021
Consider a linear realization of a matroid over a field. One associates with it a configuration polynomial and a symmetric bilinear form with linear homogeneous coefficients.
Denham, Graham, Schulze, Mathias, Walther, Uli   +2 more
core   +1 more source

Polynomial Spline Collocation Method for Solving Weakly Regular Volterra Integral Equations of the First Kind

Известия Иркутского государственного университета: Серия "Математика", 2022
The polynomial spline collocation method is proposed for solution of Volterra integral equations of the first kind with special piecewise continuous kernels.
Aleksandr Tynda, Samad Noeiaghdam, Denis Sidorov   +2 more
doaj   +1 more source

Periodicity of hyperplane arrangements with integral coefficients modulo positive integers [PDF]

, 2007
We study central hyperplane arrangements with integral coefficients modulo positive integers $q$. We prove that the cardinality of the complement of the hyperplanes is a quasi-polynomial in two ways, first via the theory of elementary divisors and then ...
Kamiya, Hidehiko, Takemura, Akimichi, Terao, Hiroaki   +2 more
core   +3 more sources

An Efficient Method for Computing Liouvillian First Integrals of Planar Polynomial Vector Fields [PDF]

arXiv.org, 2020
Here we present an efficient method to compute Darboux polynomials for polynomial vector fields in the plane. This approach is restricetd to polynomial vector fields presenting a Liouvillian first integral (or, equivalently, to rational first order ...
L. Duarte, L. D. Mota
semanticscholar   +1 more source

The Kepler Problem: Polynomial Algebra of Nonpolynomial First Integrals [PDF]

Regular and Chaotic Dynamics, 2019
LaTex with AMS fonts, 18 ...
openaire   +3 more sources

The solution of some persistent $p : -q$ resonant center problems

Electronic Journal of Qualitative Theory of Differential Equations, 2018
The notion of $p:-q$ resonant center was introduced recently and studied by several authors. In this paper we generalize the notion of a persistent center to a persistent $p:-q $ resonant center and find conditions for existence of a persistent $p:-q ...
Maja Zulj, Brigita Ferčec, Matej Mencinger   +2 more
doaj   +1 more source

INVESTIGATION OF THE KOLMOGOROV-WIENER FILTER FOR CONTINUOUS FRACTAL PROCESSES ON THE BASIS OF THE CHEBYSHEV POLYNOMIALS OF THE FIRST KIND

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2020
This paper is devoted to the investigation of the Kolmogorov-Wiener filter weight function for continuous fractal processes with a power-law structure function.
Vyacheslav Gorev, Alexander Gusev, Valerii Korniienko   +2 more
doaj   +1 more source

SOLVE ABEL’S INTEGRAL EQUATION USING POINT INTERPOLATION MESHLESS METHOD [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2018
In this paper the numerical method for solving Abel,s integral equation are introduced ,this method is based on point interpolation meshless method. Also Radial basis function, zeros of the shifted Legendre polynomial as the collocation points utilized ...
Nahdh. S .m. Al-saif
doaj   +1 more source

Path Integral Approach for Superintegrable Potentials on Spaces of Non-constant Curvature: II. Darboux Spaces DIII and DIV [PDF]

, 2006
This is the second paper on the path integral approach of superintegrable systems on Darboux spaces, spaces of non-constant curvature. We analyze in the spaces $\DIII$ and $\DIV$ five respectively four superintegrable potentials, which were first given ...
A. Mostafazadeh, A. N. Sissakian, A. Ushveridze, B. Bagchi, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. Grosche, C. M. Bender, Ch. Grosche, D. Peak, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, E. G. Kalnins, F. Cannata, G. Koenigs, G. S. Pogosyan, H. Kleinert, I. S. Gradshteyn, I. V. Lutsenko, J. Fris, L. S. Schulman, M. A. Olmo Del, M. Böhm, M. N. Olevskii, M. Znojil, M. Znojil, M. Znojil, N. W. Evans, P. Winternitz, R.P. Feynman, S. Wojciechowski   +49 more
core   +3 more sources

On the Solution of Fredholm Integral Equations of the First Kind

WSEAS Transactions on Mathematics, 2021
As it is well known the problem of solving the Fredholm integral equation of the first kind belongs to the class of ill-posed problems. The Tikhonov regularization method is well known.
I. Burova, V. Ryabov
semanticscholar   +1 more source