Publication result detail

An asymptotic analysis of nonoscillatory solutions of q-difference equations via q-regular variation

ŘEHÁK, P.

Original Title

An asymptotic analysis of nonoscillatory solutions of q-difference equations via q-regular variation

English Title

An asymptotic analysis of nonoscillatory solutions of q-difference equations via q-regular variation

Type

WoS Article

Original Abstract

We do a thorough asymptotic analysis of nonoscillatory solutions of the $q$-difference equation $D_q(r(t)D_q y(t))+p(t)y(qt)=0$ considered on the lattice $\{q^k:k\in\mathbb{N}_0\}$, $q>1$. We classify the solutions according to various aspects that take into account their asymptotic behavior. We show relations among the asymptotic classes. For every positive solution we establish asymptotic formulae. Several discrepancies are revealed, when comparing the results with their existing differential equations or difference equations counterparts; however, it should be noted that many of our observations in the $q$-case have not their continuous or discrete analogies yet. Important roles in our considerations are played by the theory of $q$-regular variation and various transformations. The results are illustrated by examples.

English abstract

We do a thorough asymptotic analysis of nonoscillatory solutions of the $q$-difference equation $D_q(r(t)D_q y(t))+p(t)y(qt)=0$ considered on the lattice $\{q^k:k\in\mathbb{N}_0\}$, $q>1$. We classify the solutions according to various aspects that take into account their asymptotic behavior. We show relations among the asymptotic classes. For every positive solution we establish asymptotic formulae. Several discrepancies are revealed, when comparing the results with their existing differential equations or difference equations counterparts; however, it should be noted that many of our observations in the $q$-case have not their continuous or discrete analogies yet. Important roles in our considerations are played by the theory of $q$-regular variation and various transformations. The results are illustrated by examples.

Keywords

q-difference equation; nonoscillatory solution; monotone solution; asymptotic formula; regular variation

Key words in English

q-difference equation; nonoscillatory solution; monotone solution; asymptotic formula; regular variation

Authors

ŘEHÁK, P.

RIV year

2018

Released

24.05.2017

ISBN

0022-247X

Periodical

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS

Volume

454

Number

2

State

United States of America

Pages from

829

Pages to

882

Pages count

54

URL

https://doi.org/10.1016/j.jmaa.2017.05.034

BibTex

@article{BUT136766,
  author="Pavel {Řehák}",
  title="An asymptotic analysis of nonoscillatory solutions of q-difference equations via q-regular variation",
  journal="JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS",
  year="2017",
  volume="454",
  number="2",
  pages="829--882",
  doi="10.1016/j.jmaa.2017.05.034",
  issn="0022-247X",
  url="https://doi.org/10.1016/j.jmaa.2017.05.034"
}