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- Frédéric Chyzak, Bruno Salvy
- J. Symb. Comput.
- 1998

Many identities involving special functions, combinatorial sequences or their q-analogues can be proved using linear operators and simple arguments on the dimension of related vector spaces. In this article, we develop a theory of @-nite sequences and functions which provides a uniied framework to express algorithms proving and discovering mul-tivariate… (More)

- Frédéric Chyzak, Alban Quadrat, Daniel Robertz
- Applicable Algebra in Engineering, Communication…
- 2005

In this paper, we study linear control systems over Ore algebras. Within this mathematical framework, we can simultaneously deal with different classes of linear control systems such as time-varying systems of ordinary differential equations (ODEs), differential time-delay systems, underdetermined systems of partial differential equations (PDEs),… (More)

- F. Chyzak, A. Quadrat
- 2004

- Frédéric Chyzak
- Discrete Mathematics
- 2000

We extend Zeilberger's fast algorithm for deenite hypergeometric sum-mation to non-hypergeometric holonomic sequences. The algorithm generalizes to diierential and q-cases as well. Its theoretical justiication is based on a description by linear operators and on the theory of holonomy. R esum e. Nous etendons l'algorithme rapide de Zeilberger pour la… (More)

- Frédéric Chyzak, Peter Paule, Otmar Scherzer, Armin Schoisswohl, Burkhard Zimmermann
- Experimental Mathematics
- 2001

In this paper we discuss closed form representations of filter coefficients of wavelets on the real line, half real line and on compact intervals. We show that computer algebra can be applied to achieve this task. Moreover , we present a matrix analytical approach that unifies constructions of wavelets on the interval.

- Frédéric Chyzak
- 1998

- Alin Bostan, Shaoshi Chen, Frédéric Chyzak, Ziming Li, Guoce Xin
- ISSAC
- 2013

We present a new reduction algorithm that simultaneously extends Hermite's reduction for rational functions and the Hermite-like reduction for hyperexponential functions. It yields a unique additive decomposition that allows to decide hyperexponential integrability. Based on this reduction algorithm, we design a new algorithm to compute minimal telescopers… (More)

- Frédéric Chyzak, Michael Drmota, Thomas Klausner, Gerard Kok
- Combinatorics, Probability & Computing
- 2008

Let Tn denote the set of unrooted labeled trees of size n and let M be a particular (finite, unlabeled) tree. Assuming that every tree of Tn is equally likely, it is shown that the limiting distribution as n goes to infinity of the number of occurrences of M as an induced subtree is asymptotically normal with mean value and variance asymptotically… (More)

We describe the main features of the Dynamic Dictionary of Mathematical Functions (version 1.5). It is a website consisting of interactive tables of mathematical formulas on elementary and special functions. The formulas are automatically generated by computer algebra routines. The user can ask for more terms of the expansions, more digits of the numerical… (More)

- Frédéric Chyzak, Marni Mishna, Bruno Salvy
- J. Comb. Theory, Ser. A
- 2005

Many combinatorial generating functions can be expressed as combinations of symmetric functions , or extracted as sub-series and specializations from such combinations. Gessel has outlined a large class of symmetric functions for which the resulting generating functions are D-finite. We extend Gessel's work by providing algorithms that compute differential… (More)