Results 21 to 30 of about 2,531,275 (230)

Insight on the Nonhomogeneous Pantograph Equation with an Arbitrary Polynomial of Degree n: Explicit Solution

Mathematics
This paper solves a nonhomogeneous version of the pantograph equation. The nonhomogeneous term is taken as a polynomial of degree n with arbitrary coefficients.
Mona D. Aljoufi
doaj   +1 more source

Another exact inflationary solution

, 2000
A new closed-form inflationary solution is given for a hyperbolic interaction potential. The method used to arrive at this solution is outlined as it appears possible to generate additional sets of equations which satisfy the model.
A. Abdel-Rahman, A. Dolgov, A. G. Muslimov, A. Linde, Adam T. Kruger, B. Ratra, C. W. Misner, D. Pavon, D. S. Salopek, E. Kolb, F. E. Schunck, F. Lucchin, G. F. R. Ellis, J. D. Barrow, J. D. Barrow, J. E. Lidsey, J. Islam, J. Lima, J. Matyjasek, J. W. Norbury, J. W. Norbury, John W. Norbury, K. Coble, K. Freese, L. Ford, L. Parker, M. Berman, M. Gasperini, M. Ozer, M. Reuter, P. J. E. Peebles, P. Peebles, S. Barr, S. P. Starkovich, T. Olson, V. M. Zhuravlev, W. Chen, Y. Fujii   +37 more
core   +2 more sources

Exact charged traversable wormhole solution

Physics Letters B
An exact analytical solution for the charged traversable wormhole solution has been found by solving minimally coupled Einstein-Maxwell-Scalar (EMS) field equations.
Bobur Turimov, Ahmadjon Abdujabbarov, Bobomurat Ahmedov, Zdeněk Stuchlík   +3 more
doaj   +1 more source

THE MATHEMATICAL MODEL OF DOME COVERING INDUSTRIAL FACILITY

Architecture and Engineering, 2017
A statically determinate flat truss models the industrial facility's arch. To derive dependence of structural deflection on the number of panels in a span, the Maxwell–Mohr equation, computer mathematics system Maple and the induction method are applied.
Mikhail Kirsanov, Sergei Astahov
doaj   +1 more source

Exact Solution of an Octagonal Random Tiling Model [PDF]

, 1996
We consider the two-dimensional random tiling model introduced by Cockayne, i.e. the ensemble of all possible coverings of the plane without gaps or overlaps with squares and various hexagons.
Bernard Nienhuis, C. L. Henley, E. Cockayne, Jan de Gier, M. Oxborrow, M. Widom, P. A. Kalugin, V. Elser, W. Li   +8 more
core   +2 more sources

An Exact Interior Kerr Solution

, 2017
We present a simple exact solution for the interior of a rotating star. The interpretation of the stress energy tensor as that of a fluid requires the existence of a high viscosity, which is quite expected for a rotating fluid.
Banerjee, Narayan, Ravi, Aravind P
core   +1 more source

Analytical and Numerical Investigation for the Inhomogeneous Pantograph Equation

Axioms
This paper investigates the inhomogeneous version of the pantograph equation. The current model includes the exponential function as the inhomogeneous part of the pantograph equation.
Faten Aldosari, Abdelhalim Ebaid
doaj   +1 more source

An inductive method of calculation of the deflection of the truss regular type

Architecture and Engineering, 2016
In this paper, the author proposes a regular option of statically determinate flat truss with a lattice of Shukhov's type working under beam scheme. By induction, using Maple computer algebra system, the exact formula for the mid-span deflection under ...
Mikhail Kirsanov
doaj   +1 more source

General solutions of the Laplace equation

Partial Differential Equations in Applied Mathematics, 2022
With the purpose of concisely and effectively obtaining the general or exact solutions of partial differential equations (PDEs), we put forward some universal Z1transformations in present paper.
Hong Lai Zhu
doaj   +1 more source

Exact Operator Solution of $A_2$-Toda Field Theory [PDF]

, 1998
Quantum $A_2$-Toda field theory in two dimensions is investigated based on the method of quantizing canonical free field. Toda exponential operators associated with the fundamental weights are constructed to the fourth order in the cosmological constant.
Fujiwara, T., Igarashi, H., Takimoto, Y.
core   +3 more sources