Register on 3 databases
2. Find 3 articles from 3 databases
1) Файншмидт, В. Л. Ортогональные функции и краевые задачи : учебное пособие / В. Л. Файншмидт. — Санкт-Петербург : БГТУ "Военмех" им. Д.Ф. Устинова, 2021. — 58 с.
2) Фонарев, А. А. О некотором признаке сходимости тригонометрического ряда Фурье в точке / А. А. Фонарев. - Текст : электронный // Научный вестник МГТУ ГА. Серия Прикладная математика. Информатика. - 2007. - №120. - С. 111-116.
3) Eric S. Fourier analysis. Wiley.
3. Make a comparative analysis of 3 articles
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First article “Lanbook”
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Second article
“znanium.com”
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Third article
“wiley online library”
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Briefly about the book, article
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This paper first defines periodic functions and orthogonal functions. A periodic function can be expanded in a Fourier series. The Fourier series of a periodic function is the sum of sinusoidal components of different frequencies.
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In this work, the signs of convergence of the Fourier series were considered.
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In this work, finding formulas for the coefficients of the Fourier series and their meaning were presented.
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Is this book suitable for the future in my dissertation work?
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This work is the theoretical nature of my dissertation work. 5 sources were selected from the sources, it is supposed to be my dissertation work. This work contains the basic definitions of orthogonal series and formulas.
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Unanimously, I can say that in the future I can take with this article a lot suitable for my dissertation work.
Because in this article theorems were given to prove my research work.
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I can take some elements with this book. In this work, there are various graphs of orthogonal functions. They will be needed for my research work.
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