Place: Seminarraum Schloß Hagenberg
14.10.  Peter Paule  Organisational items 
21.10.  Roberto Pirastu  On the algebraiccombinatorial structure of Umbral Calculus
(work with G. Nicoletti/Bologna) Abstract: In this and in the following talks we present a combinatorial point of view for a general umbral calculus only based on the structure of vector space and coalgebra. 
28.10.  Roberto Pirastu  Umbral Calculus (part II) 
4.11.  Roberto Pirastu  Umbral Calculus (part III) 
18.11.  Istvan Nemes  Multisecting degenerate recurrences 
2.12.  Axel Riese  On automated proofs of qidentities 
9.12.  canceled  
16.12.  Ziming Li  A note on the computation of cyclotomic factors of a resultant. Abstract: In this talk we propose a method for obtaining cyclotomic factors of a resultant without computing the resultant explicitly. By the method we may get rid of intermediate expression as well. 
Istvan Nemes  Invertible elements in Hadamard Algebras Abstract: Continuing my previous talk on multisection of sequences I show how to decide in the Hadamard algebra of C and Precursive sequences that a sequence is invertible. As an application I propose a simpler mean for finding mhypergeometric solutions of recurrence relations than was given by Petkovsek and Salvy. 

13.01.  Peter Paule  Survey/Introduction to qidentities 
20.01.  canceled  
27.01.  Christian Mallinger  Holonomic functions in Koepf' s approach Abstract: I will continue the talk which started in November 1994. Wolfram Koepf gave an approach for Computing the Power Series expansion of certain classes of functions. In my talk I will (try to) close some gaps that Koepf left. I will specify some parts of his algorithm for holonomic functions. Moreover, I will state some question that arose when I was working with this subject. 