Form Sequences to Polynomials and Back, via Operator Orderings

T. Amdeberhan, V. De Angelis, A. Dixit +2

C.M. Bender and G. V. Dunne showed that linear combinations of words $q^k{p}^n{q}^{n-k}$, where $p$ and $q$ are subject to the relation $qp-pq=ı$, may be expressed as a po…