Acta mathematica scientia,Series B

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TOEPLITZ-TYPE OPERATORS ON LEBESGUE SPACES

Lu Shanzhen; Mo Huixia   

  1. School of Mathematical Sciences, Beijing Normal University, Beijing 100875, China
  • Received:2006-08-25 Revised:2007-07-08 Online:2009-02-20 Published:2009-02-20
  • Contact: Lu Shanzhen

Abstract:

Let L be the infinitesimal generator of an analytic semigroup on L2(Rn) with
Gaussian kernel bounds, and L-α/2 be the fractional integrals generated by L for 0 < α< n. Let Tj,1 be the singular integral with nonsmooth kernel related to L, or Tj,1 = I, Tj,2, Tj,4 be the linear operators, which are bounded on Lp(Rn) for 1 < p < 1, and Tj,3 = ±I(j = 1, 2, · · · , m), where I is the identity operator. For b L1loc(Rn), denote the Toeplitz-type operator by

Θba f = ∑m j=1 (Tj,1MbIα Tj,2 + Tj,3MbIα Tj,4),
where Mb is a multiplication operator. When b ∈Λβ(0 < < 1), the authors consider the boundedness of Θbα.

Key words: Toeplitz type operator, generalized fractional integral, singular integral with
nonsmooth kernel,
Lipschitz function space

CLC Number: 

  • 42B20
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