Results 41 to 50 of about 634 (218)

New Karhunen-Loève expansions based on Hahn polynomials with application to a Sobolev test for uniformity on Johnson graphs

open access: yesComptes Rendus. Mathématique
We give a new family of Karhunen-Loève expansions involving Hahn polynomials. This enables us to introduce discrete analogues of Watson statistics, and a test for uniformity on Johnson’s graphs. We use the fact that the zonal spherical functions on these
Pycke, Jean-Renaud
doaj   +1 more source

Doubling (Dual) Hahn Polynomials: Classification and Applications [PDF]

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2016
We classify all pairs of recurrence relations in which two Hahn or dual Hahn polynomials with different parameters appear. Such couples are referred to as (dual) Hahn doubles. The idea and interest comes from an example appearing in a finite oscillator model [Jafarov E.I., Stoilova N.I., Van der Jeugt J., J. Phys. A: Math. Theor.
Oste, Roy, Van der Jeugt, Joris
openaire   +4 more sources

Comparing Outcomes for Telehealth Versus In‐Person Family‐Based Treatment: A Retrospective Chart Review

open access: yesInternational Journal of Eating Disorders, EarlyView.
ABSTRACT Objective Telehealth services have become part of many eating disorder (ED) treatment settings; yet, few studies have examined the effectiveness of family‐based treatment (FBT) delivered via telehealth. This study compared in‐person and telehealth FBT in rates of weight restoration, treatment completion, and metrics of treatment progress, and ...
Catherine R. Drury   +20 more
wiley   +1 more source

On the Limit from q-Racah Polynomials to Big q-Jacobi Polynomials

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
A limit formula from q-Racah polynomials to big q-Jacobi polynomials is given which can be considered as a limit formula for orthogonal polynomials.
Tom H. Koornwinder
doaj   +1 more source

Markov Moment Problem and Sandwich Conditions on Bounded Linear Operators in Terms of Quadratic Forms

open access: yesMathematics, 2022
As is well-known, unlike the one-dimensional case, there exist nonnegative polynomials in several real variables that are not sums of squares. First, we briefly review a method of approximating any real-valued nonnegative continuous compactly supported ...
Octav Olteanu
doaj   +1 more source

The Impact of a Buyer's Incentives and Organizational Structure on Suppliers' Quality

open access: yesJournal of Operations Management, EarlyView.
ABSTRACT Changes in a buyer organization's incentives and structure can have a significant impact on supply chain performance, such as the quality of sourced components. We examine this relationship using data from a unique quasi‐experiment where one of the two plants of a buyer introduced long‐term quality improvement incentives and a more organic ...
Anupam Agrawal, Ujjal Kumar Mukherjee
wiley   +1 more source

Spectral Transformations and Associated Linear Functionals of the First Kind

open access: yesAxioms, 2021
Given a quasi-definite linear functional u in the linear space of polynomials with complex coefficients, let us consider the corresponding sequence of monic orthogonal polynomials (SMOP in short) (Pn)n≥0.
Juan Carlos García-Ardila   +1 more
doaj   +1 more source

Battle of the giants: Clonal expansion rates, effects on wetland plant communities and competition between introduced Phragmites australis australis and native Phragmites australis americanus

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract The success of non‐native species in novel environments has received worldwide attention, resulting in dozens of hypotheses trying to explain this demographic success.
Bernd Blossey   +2 more
wiley   +1 more source

Bethe Ansatz Solutions to Quasi Exactly Solvable Difference Equations

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2009
Bethe ansatz formulation is presented for several explicit examples of quasi exactly solvable difference equations of one degree of freedom which are introduced recently by one of the present authors.
Ryu Sasaki, Wen-Li Yang, Yao-Zhong Zhang
doaj   +1 more source

Efficient algorithms for construction of recurrence relations for the expansion and connection coefficients in series of quantum classical orthogonal polynomials

open access: yesJournal of Advanced Research, 2010
Formulae expressing explicitly the q-difference derivatives and the moments of the polynomials Pn(x ; q) ∈ T (T ={Pn(x ; q) ∈ Askey–Wilson polynomials: Al-Salam-Carlitz I, Discrete q-Hermite I, Little (Big) q-Laguerre, Little (Big) q-Jacobi, q-Hahn ...
Eid H. Doha, Hany M. Ahmed
doaj   +1 more source

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