Math @ Duke

Publications [#318302] of Ding Ma
Papers Published
 Ma, D; Chen, G, Spectra of unitary integral operators on L^{2} (ℝ.) with Kernels k(xy),
in Integral Equations, Boundary Value Problems and Related Problems: Dedicated to Professor ChienKe Lu on the Occasion of his 90th Birthday: Yinchuan, Ningxia, China, 1923 August 2012
(January, 2013),
pp. 195210, ISBN 9789814452885 [doi]
(last updated on 2018/01/23)
Abstract: © 2013 by World Scientific Publishing Co. Pte. Ltd. All rights reserved. Unitary integral transforms play an important role in mathematical physics. A primary example is the Fourier transform whose kernel is of the form k(x, y) = k(xy), i.e., of the product type. Here we consider the determination of spectrum for such unitary operators as the issue is important in the solvability of the corresponding inhomogeneous Fredholm integral equation of the second kind. A Main Theorem is proven that characterizes the spectral set. Properties of eigenfunctions and eigenspace dimensions are further derived as consequences of the Main Theorem. Concrete examples are also offered as applications.


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