A solution to the Cauchy dual subnormality problem for 2-isometries

Akash Anand, Sameer Chavan, Zenon Jan Jabłoński +1

The Cauchy dual subnormality problem asks whether the Cauchy dual operator $T^{\prime }:=T(T^{\ast }T{)}^{-1}$ of a $2$-isometry $T$ is subnormal. In the present paper we show that the prob…