tailieunhanh - Báo cáo hóa học: " Norm inequalities for the conjugate operator in two-weighted Lebesgue spaces"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Norm inequalities for the conjugate operator in two-weighted Lebesgue spaces | Rim and Lee Journal of Inequalities and Applications 2011 2011 117 http content 2011 1 117 2 Journal of Inequalities and Applications a SpringerOpen Journal RESEARCH Open Access Norm inequalities for the conjugate operator in two-weighted Lebesgue spaces Kyung Soo Rim and Jaesung Lee Correspondence ksrim@sogang. Department of Mathematics Sogang University Seoul 121-742 Korea Springer Abstract In this article first we prove that weighted-norm inequalities for the M-harmonic conjugate operator on the unit sphere whenever the pair u v of weights satisfies the Ap-condition and udơ vdơ are doubling measures where dơ is the rotationinvariant positive Borel measure on the unit sphere with total measure 1. Then we drive cross-weighted norm inequalities between the Hardy-Littlewood maximal function and the sharp maximal function whenever u v satisfies the Ap-condition and vdơ does a certain regular condition. 2000 MSC primary 32A70 secondary 47G10. Keywords two-weighted norm inequality non-isotropic metric maximal function sharp maximal function M-harmonic conjugate operator Hilbert transform 1 Introduction Let B be the unit ball of c with norm z z z 1 2 where is the Hermitian inner product S be the unit sphere and ơ be the rotation-invariant probability measure on S. For z e B e S we define the -harmonic conjugate kernel K z by iK z ệ 2C z ệ - P z ệ - 1 where C z 1 - z Ộ - is the Cauchy kernel and P z 1 - z 2 1 - z L 2 is the invariant Poisson kernel 1 . For the kernels C and P refer to 2 . And for all f - A B the ball algebra such that f 0 is real the reproducing property of 2C z - 1 2 Theorem gives Ị K z I Re f I dơ I -i f z - Re f z Im f z . For n 1 the definition of Kf is the same as the classical harmonic conjugate function and so we can regard K f as the Hilbert transform on the unit circle. The Lp boundedness property of harmonic conjugate functions on the unit circle for 1 p was introduced by Riesz in 1924 3

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