نتایج جستجو برای: two dimensional integral equations

تعداد نتایج: 2912520  

1993
Sadhan K. Adhikari Lauro Tomio

Starting from the two-particle Bethe-Salpeter equation in the ladder approximation and integrating over the time component of momentum, we rederive three dimensional scattering integral equations satisfying constraints of relativistic unitarity and covariance, first derived by Weinberg and by Blankenbecler and Sugar. These two-particle equations are shown to be related by a transformation of va...

Journal: :Kragujevac journal of mathematics 2022

In this study, using a one-dimensionl MRA we constructed two-dimensional wavelet as well four masks which are not related to the MRA. Finally, provide some examples prove applicability of our construction in case finding numerical solution first kind Fredholm integral equations.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی 1390

دراین پایان نامه نظر به اهمیت معادلات انتگرال ولترای خطی در حل مسائل فیزیک ،مهندسی و ... ، روش های کالوکیشن و کالوکیشن تکراری جهت حل معادلات انتگرال ولترای منفرد ضعیف مورد بررسی قرار می گیرند . سپس در ادامه در موردهمگرایی این روشها مطالب مفیدی بیان خواهد شد . در پایان نتیجه میگیریم که اگر جواب دقیق در برخی از فضاهای مناسب وجود داشته باشد ، با استفاده از این روش یک همگرایی قوی میتواند بوجود بیای...

Journal: :نظریه تقریب و کاربرد های آن 0
احمد شهسواران islamic azad university, boroujerd branch, boroujerd, iran. اکبر شهسواران islamic azad university, boroujerd branch, boroujerd, iran.

in this work, we present a computational method for solving second kindnonlinear fredholm volterra integral equations which is based on the use ofhaar wavelets. these functions together with the collocation method are thenutilized to reduce the fredholm volterra integral equations to the solution ofalgebraic equations. finally, we also give some numerical examples that showsvalidity and applica...

2010
Alexey A. Kashirin Sergey I. Smagin

Questions of solution of three-dimensional diffraction problems are considered. Each problem is formulated as a single weakly-singular integral equation of the 1st kind for a single unknown function. Discretization of these equations is realized by means of special smoothing method of integral operators kernels. Numerical solutions of systems of linear algebraic equations, approximating integra...

Journal: :Water Waves 2021

One hundred years ago, Nekrasov published the widely cited paper (Nekrasov in Izvestia Ivanovo-Voznesensk Politekhn Inst 3:52–65, 1921), which he derived first of his two integral equations describing steady periodic waves on free surface water. We examine how arrived at these and approach to investigating their solutions. In connection with this, Nekrasov’s life after 1917 is briefly outlined,...

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