1 Retraction Note to: Analysis and Mathematical Physics (2021) 11:6 https://doi.org/10.1007/s13324-020-00443-7

The Editor in Chief has retracted this article because it contains sections that substantially overlap with an article published by different authors [1]. In addition, severe gaps in the proofs of the main results of the paper were found post-publication.

The authors have agreed to this retraction but not to the wording of this retraction notice.