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An Lp Version of the Hardy Theorem for Motion Groups

  • Masaaki Eguchi (a1), Shin Koizumi (a2) and Keisaku Kimahara (a3)
Abstract

We describe a generalization of the Hardy theorem on the motion group. We prove that for some weight functions νω growing very rapidly and a measurable function f, the finiteness of the Lp-norm of vf and the Lq-norm of ωf implies f=0 (almost everywhere).

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References
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[1]Amrein, W. O. and Berthier, A., ‘On support properties of Lp -functions and their Fourier transforms’, J. Funct. Anal. 24 (1977), 258267.
[2]Cowling, M. G. and Price, J. F., Generalizations of Heisenberg's inequalify, Lecture Notes in Math. 992 (Springer, Berlin, 1983) pp. 443449.
[3]Dym, H. and McKean, H. P., Fourier series and integral (Academic Press, New York, 1972).
[4]Eguchi, M., Koizumi, S. and Kumahara, K., ‘An analogue of the Hardy theorem for the Cartan motion group’, Proc. Japan Acad. 74 (1998), 149151.
[5]Eguchi, M., Kumahara, K. and Muta, Y., ‘A subspace of Schwartz space on motion group’, Hiroshima Math. J. 10 (1980), 691698.
[6]Kumahara, K., ‘Fourier transforms on the motion groups’, J. Math. Soc. Japan. 26 (1976), 1832.
[7]Sitaram, A. and Sundari, M., ‘An analogue of Hardy's theorem for very rapidly decreasing functions on semi-simple Lie groups’, Pacific J. Math. 177 (1997), 187200.
[8]Sundari, M., ‘Hardy's theorem for the n-dimensional Euclidean motion group’, Proc. Amer Math. Soc. 126 (1998), 11991204.
[9]Warner, G., Harmonic analysis on semi-simple Lie groups, vol. I (Springer, New York, 1972).
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Journal of the Australian Mathematical Society
  • ISSN: 1446-7887
  • EISSN: 1446-8107
  • URL: /core/journals/journal-of-the-australian-mathematical-society
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