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Further remarks on extended umbral calculus

Kwaśniewski, A. K.Grądzka, E. — 2002

Proceedings of the 21st Winter School "Geometry and Physics"

The paper deals with extensions of the finite operator calculus of G.-C. Rota called ψ -extensions which give a framework for corresponding quantum group investigations. This also covers the instance of the well-known q -analogue of umbral calculus. The article also contains glossaries of the most important terms and notations used by Ward, Viskov, Markowsky and Roman on one side and the Rota-oriented notations on the other side.

More on deformed oscillator algebras and extended umbral calculus

Kwaśniewski, A. K.Grądzka, E. — 2003

Proceedings of the 22nd Winter School "Geometry and Physics"

This paper deals with ϕ ( q ) calculus which is an extension of finite operator calculus due to Rota, and leading results of Rota’s calculus are easily ϕ -extendable. The particular case ϕ n ( q ) = [ n q 1 ] - 1 is known to be relevant for quantum group investigations. It is shown here that such ϕ ( q ) umbral calculus leads to infinitely many new ϕ -deformed quantum like oscillator algebra representations. The authors point to several references dealing with new applications of q umbral and ϕ ( q ) calculus in which new families of ϕ ( q ) extensions...

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