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Weighted Lp-type estimates for a class of generalized Calderón-Zygmund type singular integrals
Journal article

Weighted Lp-type estimates for a class of generalized Calderón-Zygmund type singular integrals

Lihe Wang and Fengping Yao
Journal of pseudo-differential operators and applications, Vol.17(1), 16
03/01/2026
DOI: 10.1007/s11868-026-00768-0

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Abstract

In this paper we shall investigate the weighted L-p-type estimates for a class of generalized Calder & oacute;n-Zygmund type singular integrals T(epsilon,beta )f (x) = integral({|x - y|>epsilon} )Omega(x - y)/|x - y|(n - beta )f (y)dy for epsilon > 0 and beta is an element of (0, n). We should remark that the existence of the constant beta in these singular integrals is the key difference from traditional Calder & oacute;n-Zygmund type singular integral operators, which also renders the problems more challenging. In fact, this class of singular integrals arises from the approximation of the surface quasi-geostrophic (SQG) equation, which describes geophysical flows in the atmosphere and ocean.
Mathematics Physical Sciences Mathematics, Applied Science & Technology

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