Results 31 to 40 of about 4,347,679 (285)
Integrable systems and modular forms of level 2 [PDF]
, 2006 A set of nonlinear differential equations associated with the Eisenstein series of the congruent subgroup $\Gamma_0(2)$ of the modular group $SL_2(\mathbb{Z})$ is constructed. These nonlinear equations are analogues of the well known Ramanujan equations,
Ablowitz, Mark J +2 more
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How efficient is exemplary teaching in learning equations and inequations in the third and fourth grade of primary school? [PDF]
Zbornik radova (Univerzitet u Kragujevcu. Pedagoški fakultet u Užicu)The aim of the study was to investigate the efficiency of learning equations and inequations through the application of exemplary teaching in primary school.
Malinović-Jovanović Nela T. +2 more
doaj +1 more source
Ciência Rural, 1996 O presente trabalho teve como objetivos definir uma equação para descrever as alturas de árvores de Eucalyptus dunnii Maiden em função dos diâmetros medidos a altura do peito. Os dados foram coletados em árvores amostras com idade de seis e sete anos, em
Magda Léa Bolzan Zanon +4 more
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Journal of Taibah University for Science, 2019 We completely characterize up to an isomorphism those rings whose elements satisfy the equations $ x^4=x $ or $ x^4=-x $ . Specifically, it is proved that a ring is weakly quadratent if, and only if, it is isomorphic to either K, $ \mathbb {Z}_3 ...
Peter V. Danchev
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MathematicsThe work establishes the unique solvability of a boundary value problem for a 3D linearized system of Navier–Stokes equations in a degenerate domain represented by a cone.
Muvasharkhan Jenaliyev +2 more
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Expansion Method for Solving Fredholm Integral Equations [PDF]
Kirkuk Journal of Science, 2006 In this paper a new method for solving the integral equation in space-time which arises in mathematical physics, mechanics and the heat conduction theory is presented.
Shazad Shawki Ahmad
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Some Numerical Methods to Solve a System of Fredholm Integral Equations of the 2nd Kind with Symmetric Kernel [PDF]
Kirkuk Journal of Science, 2009 In this paper the modification in successive approximation method is defined to solve a system of linear fredholm integral equations(SLFIE) of the 2nd kind with symmetric kernel, also applied Aitken method depending on successive approximation method to
Nejmaddin A. Sulaiman
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Nonlinear perturbations of Reissner-Nordstr\"om black holes
, 2019 We develop a nonlinear perturbation theory of Reissner-Nordstr\"om black holes. We show that, at each perturbation level, Einstein-Maxwell equations can be reduced to four inhomogeneous wave equations, two for polar and two for axial sector ...
Rutkowski, Mieszko
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International Journal of Mathematics and Mathematical SciencesA solution to the initial-boundary value problem for the heat equation with a discontinuous coefficient and a general conjugation condition is verified using the Fourier method.
Umbetkul Кoilyshov +2 more
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Motion of Submerged Body in a Frozen Channel with Compressed Porous Ice
Applied SciencesThe problem of submerged body motion in a frozen channel is considered. The fluid in the channel is assumed to be inviscid and incompressible. Fluid flow is the potential. The ice cover has non-uniform compression along the principal coordinates.
Tatyana Sibiryakova +3 more
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