حل عددی معادلات دیفرانسیل پانتوگراف کسری غیرخطی با شرایط مرزی با استفاده از چندجملهایهای ژاکوبی
محورهای موضوعی : پردازش چند رسانه ای، سیستمهای ارتباطی، سیستمهای هوشمند
1 - دانشگاه مازندران
2 - گروه ریاضی کاربردی، دانشکده علوم ریاضی، دانشگاه مازندران، بابلسر، ایران
کلید واژه: معادله دیفرانسیل پانتوگراف کسری, شرایط مرزی, معادله انتگرال ولترا-فردهلم, چندجملهایهای ژاکوبی,
چکیده مقاله :
در این پژوهش، یک روش عددی بر پایهی چندجملهایهای ژاکوبی برای حل معادلات دیفرانسیل پانتوگراف کسری غیرخطی با شرایط مرزی معرفی میشود. ابتدا، معادله دیفرانسیل بهصورت یک معادله انتگرال ولترا-فردهلم معادل بیان میشود. سپس، چندجملهایهای ژاکوبی و فرمول انتگرالگیری گاوس-ژاکوبی بههمراه نقاط هممحلی نیوتن-کاتس برای تبدیل معادله انتگرال حاصل به دستگاهی از معادلات جبری غیرخطی استفاده میشود. در آخر، با در نظر گرفتن چند مثال و محاسبه خطاهای L^"2" و L^∞، کارایی و دقت روش پیشنهادی نشان داده میشود.- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
In this research, we have numerically solved a set of nonlinear fractional pantograph differential equations with boundary conditions using Jacobi polynomials. The present method turns the problem into a system of nonlinear algebraic equations, which simplifies the problem. It is suggested to use Jacobi wavelets to solve such problems, because in problems where the solution is not smooth enough, using wavelets by keeping the polynomial degree constant and increasing the number of wavelets will lead to an improvement in the approximation.
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