Riemann-Hilbert problems for poly-Hardy space on the unit ball |
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Authors: | Fuli He Pei Dang Uwe Kähler |
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Institution: | 1. School of Mathematics and Statistics, Central South University, P.R. China.;2. Faculty of Information Technology, Macau University of Science and Technology, Macao, China.;3. CIDMA, Department of Mathematics, University of Aveiro, Portugal. |
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Abstract: | In this paper, we focus on a Riemann–Hilbert boundary value problem (BVP) with a constant coefficients for the poly-Hardy space on the real unit ball in higher dimensions. We first discuss the boundary behaviour of functions in the poly-Hardy class. Then we construct the Schwarz kernel and the higher order Schwarz operator to study Riemann–Hilbert BVPs over the unit ball for the poly-Hardy class. Finally, we obtain explicit integral expressions for their solutions. As a special case, monogenic signals as elements in the Hardy space over the unit sphere will be reconstructed in the case of boundary data given in terms of functions having values in a Clifford subalgebra. Such monogenic signals represent the generalization of analytic signals as elements of the Hardy space over the unit circle of the complex plane. |
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Keywords: | Hardy space Riemann–Hilbert problems monogenic signals Schwarz kernel |
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