Lie structures of the group of Sheffer operators

Dmitri Finkelshtein, Eugene Lytvynov, Maria Joao Oliveira

Let $\hat{I}¦$ be an (LB)-space over $\mathbb{F}=\mathbb{R}$ or $\mathbb{C}$, and let $\hat{I}{¦}^{\prime }$ be the dual space of~$\hat{I}¦$. We study the set $\mathbb{S}(\hat{I}¦)$ of Sheffer operators acting in polyno…