Ağırlıklı iç çarpım ile zaman kesirli problem

Year 2022, Volume: 24 Issue: 1, 91 - 99, 05.01.2022

Süleyman Çetinkaya , Ali Demir

https://doi.org/10.25092/baunfbed.857640

Abstract

Bu çalışmada, kesirli mertebeden kısmi diferansiyel denklemler içeren homojen başlangıç sınır değer probleminin analitik çözümünü araştırıyoruz. Homojen başlangıç sınır değeri problemi Caputo kesirli mertebe türevini içerdiğinden klasik başlangıç ve sınır koşullarına sahiptir. Değişkenlerine ayırma yöntemi ve L^2 [0,l] de tanımlanan ağırlıklı iç çarpım ile çözüm, bu çalışmada kullanılan Caputo anlamında kesirli türevi içeren bir Sturm-Liouville özdeğer probleminin özfonksiyonlarına göre bir Fourier serisi şeklinde oluşturulmuştur. Fourier serisindeki katsayıları elde etmek için ağırlıklı fonksiyona sahip yeni bir iç çarpım tanımlanmıştır. Çözülen örnek, değişkenlerine ayırma yönteminin kesirli matematik problemleri üzerindeki uygulanabilirliğini ve etkisini göstermektedir.

Keywords

Caputo kesirli türev, dirichlet sınır koşulları, değişkenlerine ayırma, spektral method, ağırlıklı iç çarpım

Time fractional problem via inner product including weighted function

Abstract

In this research, we discuss the construction of analytic solution of homogenous initial boundary value problem including PDEs of fractional order. Since homogenous initial boundary value problem involves Caputo fractional order derivative, it has classical initial and boundary conditions. By means of separation of variables method and the inner product defined on L^2 [0,l], the solution is constructed in the form of a Fourier series with respect to the eigenfunctions of a corresponding Sturm-Liouville eigenvalue problem including fractional derivative in Caputo sense used in this study. We defined a new inner product with a weighted function to get coefficients in the Fourier series. Illustrative example presents the applicability and influence of separation of variables method on fractional mathematical problems.

Keywords

Caputo fractional derivative, dirichlet boundary conditions, separation of variables, spectral method, weighted ınner product

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