University of KashanMathematics Interdisciplinary Research2538-36392120170601Hartley Series Direct Method for Variational Problems23314079210.22052/mir.2017.40792ENAbbasSaadatmandiDepartment of Applied Mathematics, Faculty of Mathematical Sciences, University of Kashan, Kashan, I R Iran0000-0002-7744-7770Journal Article20161104The computational method based on using the operational matrix of an orthogonal function for solving variational problems is computer oriented. In this approach, a truncated Hartley series together with the operational matrix of integration and integration of the cross product of two cas vectors are used for finding the solution of variational problems. Two illustrative examples are included to demonstrate the validity and applicability of the technique.https://mir.kashanu.ac.ir/article_40792_931f8bf99deb896469e4c2213c7c3d49.pdf