Razzaghi, M.; Ordokhani, Y. An application of rationalized Haar functions for variational problems. (English) Zbl 1020.49026 Appl. Math. Comput. 122, No. 3, 353-364 (2001). Summary: A direct method for solving variational problems using rationalized Haar functions is presented. An operational matrix of integration and the cross product of two rationalized Haar function vectors are utilized to reduce a variational problem to the solution of algebraic equations. Illustrative examples are included to demonstrate the validity and applicability of the technique. Cited in 16 Documents MSC: 49M25 Discrete approximations in optimal control 65T60 Numerical methods for wavelets Keywords:direct methods; orthogonal functions; variational problems; rationalized Haar functions; algebraic equations PDF BibTeX XML Cite \textit{M. Razzaghi} and \textit{Y. Ordokhani}, Appl. Math. Comput. 122, No. 3, 353--364 (2001; Zbl 1020.49026) Full Text: DOI OpenURL References: [1] Chen, C.F.; Hsiao, C.H., A Walsh series direct method for solving variational problems, Journal of the franklin institute, 300, 265-280, (1975) · Zbl 0339.49017 [2] Hwang, C.; Shih, Y.P., Optimal control of delay systems via block pulse functions, Journal of optimization theory and applications, 45, 101-112, (1985) · Zbl 0541.93031 [3] Hwang, C.; Shih, Y.P., Laguerre series direct method for variational problems, Journal of optimization theory and applications, 39, 143-149, (1983) · Zbl 0481.49005 [4] Chang, R.Y.; Wang, M.L., Shifted Legendre direct method for variational problems series, Journal of optimization theory and applications, 39, 299-307, (1983) · Zbl 0481.49004 [5] Horng, I.R.; Chou, J.H., Shifted Chebyshev direct method for solving variational problems, International journal of systems science, 16, 855-861, (1985) · Zbl 0568.49019 [6] Razzaghi, M.; Razzaghi, M.; Arabshahi, A., Solution of convolution integral and Fredholm integral equations via double Fourier series, Applied mathematics and computation, 40, 215-224, (1990) · Zbl 0717.65113 [7] Gelfand, I.M.; Fomin, S.V., Calculus of variations, (1963), Prentice-Hall Englewood Cliffs, NJ · Zbl 0127.05402 [8] Elsgolc, L.E., Calculus of variations, (1962), Pergamon Press Oxford · Zbl 0101.32001 [9] Razzaghi, M.; Razzaghi, M., Fourier series direct method for variational problems, International journal of control, 48, 887-895, (1988) · Zbl 0651.49012 [10] Razzaghi, M.; Razzaghi, M., Instabilities in the solutions of heat conduction problem using Taylor series and alternative approaches, Journal of the franklin institute, 326, 215-224, (1989) · Zbl 0684.34012 [11] M. Razzaghi, J. Nazarzadeh, Walsh functions, Wiley Encyclopedia of Electrical and Electronics Engineering, vol. 23, Wiley, New York, 1999, 429-440 pp [12] R.T. Lynch, J.J. Reis, Haar transform image coding, in: Proc. 1976 National Telecommun. Conf., Dallas, TX, 1976, pp. 44.3-1-44.3 [13] J.J. Reis, R.T. Lynch, J. Butman, Adaptive Haar transform video bandwidth reduction system for RPV’s, in: Proc. Ann. Meeting Soc. Photo Optic Inst. Eng. (SPIE), San Diego, CA, 1976, pp. 24-35 [14] Ohkita, M.; Kobayashi, Y., An application of rationalized Haar functions to solution of linear differential equations, IEEE transactions on circuit and systems, 9, 853-862, (1986) · Zbl 0613.65072 [15] Ohkita, M.; Kobayashi, Y., An application of rationalized Haar functions to solution of linear partial differential equations, Mathematics and computers in simulations, 30, 419-428, (1988) · Zbl 0659.65109 [16] Schechter, R.S., The variation method in engineering, (1967), McGraw-Hill New York · Zbl 0176.10001 This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. It attempts to reflect the references listed in the original paper as accurately as possible without claiming the completeness or perfect precision of the matching.