Results 41 to 50 of about 71,161 (303)
Random matrices with equispaced external source [PDF]
, 2013 We study Hermitian random matrix models with an external source matrix which has equispaced eigenvalues, and with an external field such that the limiting mean density of eigenvalues is supported on a single interval as the dimension tends to infinity ...
Claeys, Tom, Wang, Dong
core +2 more sources
Krein-Adler transformations for shape-invariant potentials and pseudo virtual states [PDF]
, 2013 For eleven examples of one-dimensional quantum mechanics with shape-invariant potentials, the Darboux-Crum transformations in terms of multiple pseudo virtual state wavefunctions are shown to be equivalent to Krein-Adler transformations deleting multiple
Odake, Satoru, Sasaki, Ryu
core +2 more sources
Multiple Orthogonal Polynomials on the Unit Circle
Constructive Approximation, 2007 We introduce multiple orthogonal polynomials on the unit circle. We show how this is related to simultaneous rational approximation to Caratheodory functions (two-point Hermite-Pade approximation near zero and near infinity). We give a Riemann-Hilbert problem for which the solution is in terms of type I and type II multiple orthogonal polynomials on ...
Ceniceros, J.M., Van Assche, W.
openaire +3 more sources
Multiplicity of zeros and discrete orthogonal polynomials [PDF]
Results in Mathematics, 2004 We consider a problem of bounding the maximal possible multiplicity of a zero at of some expansions $\sum a_i F_i(x)$, at a certain point $c,$ depending on the chosen family $\{F_i \}$. The most important example is a polynomial with $c=1.$ It is shown that this question naturally leads to discrete orthogonal polynomials.
openaire +3 more sources
Italian Journal of Animal Science, 2010 The objectives of this study were to estimate (co)variance functions for additive genetic and permanent environmental effects, as well as the genetic parameters for milk yield over multiple parities, using random regressions models (RRM).
H. Tonhati +6 more
doaj +1 more source
A Compressed Sensing Estimation Technique for Doubly Selective Channel in OFDM Systems
IEEE Access, 2019 In this work, an estimation algorithm based on the compressive sensing (CS) technique is proposed for an orthogonal frequency division multiplexing (OFDM) system applied to multi-path time-varying channels.
Huang-Chang Lee +2 more
doaj +1 more source
Vanishing sums of roots of unity and the Favard length of self-similar product sets
Discrete Analysis, 2022 Vanishing sums of roots of unity and the Favard length of self-similar product sets, Discrete Analysis 2022:19, 31 pp. An important theme in geometric measure theory is the typical size of a set when it is randomly projected. For example, suppose that $
Izabella Laba, Caleb Marshall
doaj +1 more source
Appell polynomials and their relatives [PDF]
, 2004 This paper summarizes some known results about Appell polynomials and investigates their various analogs. The primary of these are the free Appell polynomials.
Anshelevich, Michael
core +4 more sources
Average Characteristic Polynomials of Determinantal Point Processes [PDF]
, 2015 We investigate the average characteristic polynomial $\mathbb E\big[\prod_{i=1}^N(z-x_i)\big] $ where the $x_i$'s are real random variables which form a determinantal point process associated to a bounded projection operator.
Hardy, Adrien
core +2 more sources
Polynomials with Odd Orthogonal Multiplicity
Finite Fields and Their Applications, 1998 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources