ArticleOriginal scientific text

Title

Lp-improving properties of measures supported on curves on the Heisenberg group

Authors 1

Affiliations

  1. Dipartimento di Matematica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy

Abstract

Lp-Lq boundedness properties are obtained for operators defined by convolution with measures supported on certain curves on the Heisenberg group. We find the curvature condition for which the type set of these operators can be the full optimal trapezoid with vertices A=(0,0), B=(1,1), C=(2/3,1/2), D=(1/2,1/3). We also give notions of right curvature and left curvature which are not mutually equivalent.

Bibliography

  1. W. Drury, Degenerate curves and harmonic analysis, Math. Proc. Cambridge Philos. Soc. 108 (1990), 89-96.
  2. A. M. Mantero, Asymmetry of convolution operators on the Heisenberg group, Boll. Un. Mat. Ital. A (6) 4 (1985), 19-27.
  3. D. Oberlin, Convolution estimates for some measures on curves, Proc. Amer. Math. Soc. 99 (1987), 56-60.
  4. Y. Pan, A remark on convolution with measures supported on curves, Canad. Math. Bull. 36 (1993), 245-250.
  5. Y. Pan, Convolution estimates for some degenerate curves, Math. Proc. Cambridge Philos. Soc. 116 (1994), 143-146.
  6. Y. Pan, Lp-improving properties for some measures supported on curves, preprint.
  7. F. Ricci and E. M. Stein, Harmonic analysis on nilpotent groups and singular integrals. III. Fractional integration along manifolds, J. Funct. Anal. 86 (1989), 360-389.
  8. S. Secco, Fractional integration along homogeneous curves in 3, preprint.
Pages:
179-201
Main language of publication
English
Received
1998-04-17
Accepted
1998-05-18
Published
1999
Exact and natural sciences