Far East Journal of Mathematical Sciences (FJMS)

The Far East Journal of Mathematical Sciences (FJMS) publishes original research papers and survey articles in pure and applied mathematics, statistics, mathematical physics, and other related fields. It welcomes application-oriented work as well.

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CONVOLUTION OPERATOR WITH A WEIGHT FUNCTION FOR HARTLEY INTEGRAL TRANSFORM AND ITS APPLICATIONS

Authors

  • N. M. Khoa

Keywords:

Integral equation, convolution, generalized convolution, Hartley transform

DOI:

https://doi.org/10.17654/0972087125036

Abstract

In this paper, we introduce a new convolution operator with the weight function $\gamma(y)=\sin y$ for Hartley integral transform. Several algebraic properties of this convolution operator are presented. In application, we apply this convolution operator to solving a class of integral equation and system of integral equations of Toeplitz plus Hankel type. On the other hand, we study the Watson- type integral transform for this convolution operator. We establish necessary and sufficient conditions for these operators to be unitary in the space $L_2(\mathbb{R})$ and get their inverse represented in the conjungate symetric form. Moreover, we also formulate the Plancherel type theorem for aforementioned operators, prove a sequence of functions that converges to original function in the norm of $L_2(\mathbb{R}),$ and further show the boundedness of these operator. Finally, we study a class of integro- differential equation of Barashin type.

Received: June 9, 2025
Revised: September 4, 2025
Accepted: September 12, 2025

References

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[12] E. C. Titchmarsh, Introduction to the Theory of Fourier Integrals, Chelsea, New York, 1986.

[13] N. X. Thao and H. T. V. Anh, On the Hartley-Fourier sine generalized convolution, Math. Methods Appl. Sci. 37(15) (2014), 2308-2319.

[14] F. Al-Musallam and V. K. Tuan, Integral transforms related to a generalized convolution, Results Math. 38 (2000), 197-208. doi.10.1007/BF03322007.

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[16] N. X. Thao, V. K. Tuan and N. T. Hong, Integral transforms of Fourier cosine and sine generalized convolution type, Int. J. Math. Math. Sci. 2007, Art. ID 97250, 1-11.

[17] E. M. Stein and G. Weiss, Introduction to Fourier Analysis on Euclidean Space, Princeton, Princeton University Press, NJ, 1971.

Published

2025-09-23

Issue

Section

Articles

How to Cite

CONVOLUTION OPERATOR WITH A WEIGHT FUNCTION FOR HARTLEY INTEGRAL TRANSFORM AND ITS APPLICATIONS. (2025). Far East Journal of Mathematical Sciences (FJMS), 142(4), 657-676. https://doi.org/10.17654/0972087125036

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