In this paper, we show that Hilbert transforms along some curves are bounded on for some and some UMD spaces . In particular, we prove that Hilbert transforms along some curves are completely -bounded in the terminology from operator space theory. Moreover, we obtain the -boundedness of anisotropic singular integrals by using the “method of rotations” of Calderón–Zygmund. All these results extend preexisting related ones.
Banach J. Math. Anal.
10(2):
430-450
(April 2016).
DOI: 10.1215/17358787-3589397