Results 31 to 40 of about 156,857 (312)

Reconstructing rational functions with FireFly [PDF]

open access: yesComputer Physics Communications, 2020
Abstract We present the open-source C++ library FireFly for the reconstruction of multivariate rational functions over finite fields. We discuss the involved algorithms and their implementation. As an application, we use FireFly in the context of integration-by-parts reductions and compare runtime and memory consumption to a fully algebraic ...
Jonas Klappert, Fabian Lange
openaire   +2 more sources

Characterizations of rectangular (para)-unitary rational functions [PDF]

open access: yesOpuscula Mathematica, 2016
We here present three characterizations of not necessarily causal, rational functions which are (co)-isometric on the unit circle: (i) through the realization matrix of Schur stable systems, (ii) the Blaschke-Potapov product, which is then employed to ...
Daniel Alpay   +2 more
doaj   +1 more source

Rational Schubert polynomials [PDF]

open access: yes, 2015
We define and study the rational Schubert, rational Grothendieck, rational key polynomials in an effort to understand Molev's dual Schur functions from the viewpoint of ...
Aker, Kursat, TUTAŞ, NESRİN
core   +1 more source

A rank formula for the self-commutators of rational Toeplitz tuples

open access: yesJournal of Inequalities and Applications, 2016
In this paper we derive a rank formula for the self-commutators of tuples of Toeplitz operators with matrix-valued rational symbols.
In Sung Hwang, An Hyun Kim, Sumin Kim
doaj   +1 more source

Modeling corneal surfaces with rational functions for high-speed videokeratoscopy data compression [PDF]

open access: yes, 2009
High-speed videokeratoscopy is an emerging technique that enables study of the corneal surface and tear-film dynamics. Unlike its static predecessor, this new technique results in a very large amount of digital data for which storage needs become ...
Schneider, Martin   +2 more
core   +1 more source

Properties of rational arithmetic functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
Rational arithmetic functions are arithmetic functions of the form g1∗⋯∗gr∗h1−1∗⋯∗hs−1, where gi, hj are completely multiplicative functions and ∗ denotes the Dirichlet convolution. Four aspects of these functions are studied.
Vichian Laohakosol, Nittiya Pabhapote
doaj   +1 more source

Affine permutations and rational slope parking functions [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
We introduce a new approach to the enumeration of rational slope parking functions with respect to the area and a generalized dinv statistics, and relate the combinatorics of parking functions to that of affine permutations. We relate our construction to
Eugene Gorsky   +2 more
doaj   +1 more source

On the decomposition of rational functions

open access: yesJournal of Symbolic Computation, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mohamed Ayad, Peter Fleischmann
openaire   +1 more source

Integration of Rational Functions [PDF]

open access: yes, 2023
A rational function can always be integrated, that is, the integral of such a function is always an elementary function. The integration procedure is complex and consists of four steps: elimination of the common zero-points of the numerator and ...
Mishra, Vishnu Narayan   +5 more
core  

A template generation algorithm for non-rational transfer functions in QFT designs [PDF]

open access: yes, 1997
In several applications of quantitative feedback theory (QFT) approach to robust controller synthesis, templates of uncertain non-rational transfer functions are required to be numerically generated.
NATARAJ, PSV, SARDAR, G
core   +1 more source

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