Orthogonal Polynomials, Special Functions and Applications, 3rd Edition

A special issue of Axioms (ISSN 2075-1680). This special issue belongs to the section "Mathematical Analysis".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 1278

Special Issue Editor


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Guest Editor
Mathematical Institute, Serbian Academy of Sciences and Arts, 11000 Belgrade, Serbia
Interests: approximation theory; special functions; extremal problems; inequalities; orthogonal polynomials; nonclassical orthogonal polynomials; numerical analysis; numerical linear algebra; interpolation in complex plane; orthogonality on the semicircle
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Special Issue Information

Dear Colleagues,

This Special Issue is a continuation of the previous successful Special Issues “Orthogonal Polynomials, Special Functions and Applications” and “Orthogonal Polynomials, Special Functions and Applications: 2nd Edition”.

Orthogonal polynomials and orthogonal functions, as well as other special functions, are gaining increasing importance, and their development is often conditioned by their application in many areas of applied and computational sciences. This Special Issue of Axioms is devoted to various aspects of the theory of orthogonality in real or complex spaces, with respect to the standard inner products (classical and strongly non-classical cases) and moment functionals, including one-dimensional and multi-dimensional cases, as well as to orthogonalization in numerical linear algebra. Contributions that consider the development and application of special functions, as well as problems in which special functions play a significant role, are welcome. Particularly interesting are the theories and applications in which both orthogonality and special functions are represented. Consideration of the problems in which special functions play a significant role, as well as applications of orthogonal polynomials in approximation theory in the broadest sense, including quadrature formulas and integral equations, will be particularly appreciated. Furthermore, spectral, collocation, and related methods for initial value and initial-boundary value problems that involve PDEs, as well as applications and algorithms for solving open problems in mathematics, physics, and technical sciences, are of interest. Our goal is to gather experts and young researchers focused on the same task, in order to promote and exchange knowledge as well as improve communication and application. We invite the submission of research papers, as well as review articles.

Prof. Dr. Gradimir V. Milovanović
Guest Editor

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Keywords

  • orthogonal polynomials and functions
  • orthogonalization in numerical linear algebra
  • special functions
  • hypergeometric functions
  • Mittag–Leffler functions and generalizations
  • zeros
  • recurrence relations
  • inner products
  • numerical integration
  • quadrature and cubature formulas
  • numerical summation of series
  • numerical differentiation
  • integral equations
  • numerical methods for integral equations and transforms
  • approximation of functions
  • spline approximation
  • Padé approximation
  • weighted approximation
  • spectral, collocation, and related methods for BVP problems
  • generating functions
  • asymptotics
  • inequalities

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Published Papers (2 papers)

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Research

17 pages, 352 KB  
Article
Integrability of a Family of Four-Dimensional Quadratic Lotka–Volterra Complex Systems
by Ivan Mastev and Valery G. Romanovski
Axioms 2026, 15(4), 297; https://doi.org/10.3390/axioms15040297 - 17 Apr 2026
Viewed by 178
Abstract
This work addresses the integrability of four-dimensional quadratic Lotka–Volterra systems exhibiting (1:−1:i:−i) resonance by identifying the parameter constraints required for such properties to exist. Our results show that, within this family, integrability is connected to linearizability and time-reversibility. To [...] Read more.
This work addresses the integrability of four-dimensional quadratic Lotka–Volterra systems exhibiting (1:−1:i:−i) resonance by identifying the parameter constraints required for such properties to exist. Our results show that, within this family, integrability is connected to linearizability and time-reversibility. To establish these results, we combine theoretical and computational methods. On the theoretical side, we use Poincaré–Dulac normal form theory and methods based on Gröbner basis theory. On the computational side, we apply the algorithms described in the paper to compute normal forms and minimal associated prime ideals required for the analysis of the integrability conditions. Full article
17 pages, 290 KB  
Article
Inequality on Three Intervals for Higher-Order Convex Functions
by Josip Pečarić, Jinyan Miao and Ðilda Pečarić
Axioms 2026, 15(1), 70; https://doi.org/10.3390/axioms15010070 - 20 Jan 2026
Viewed by 564
Abstract
In this article, an inequality on three intervals for convex functions is extended to inequalities on three intervals for higher-order convex functions. Some corollaries and applications are mentioned. Full article
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