Semi-cubic hyponormality of weighted shifts with stampfli recursive tail

Seunghwan Baek, George R. Exner, Il Bong Jung +1

Let $\alpha :\sqrt{x_m},\cdots ,\sqrt{x_1},(\sqrt{u},\sqrt{v},\sqrt{w}$ be a backward $m$-step extension of a recursive weight sequence and let be the weighted…