@article{Sharma_2019, title={Norm of a composition operator from the space of Cauchy transforms into Zygmund-type spaces}, volume={71}, url={http://umj.imath.kiev.ua/index.php/umj/article/view/367}, abstractNote={<p>The problem of evaluation of the norm of a composition operator acting between the spaces of holomorphic functions is quite difficult. <br>In the Hardy and weighted Bergman spaces, the norm of the composition operator is unknown even for the choice of a fairly simple symbol. <br>We compute the operator norm of composition operator acting between the space of Cauchy transforms and Zygmund-type spaces. <br>We also characterize bounded and compact composition operators acting between these spaces.</p> <p><br><br></p>}, number={12}, journal={Ukrainsâ€™kyi Matematychnyi Zhurnal}, author={SharmaAjay K.}, year={2019}, month={Dec.}, pages={1699-1711} }