Prikladnaya Diskretnaya Matematika
RUS  ENG    JOURNALS   PEOPLE   ORGANISATIONS   CONFERENCES   SEMINARS   VIDEO LIBRARY   PACKAGE AMSBIB  
General information
Latest issue
Archive
Impact factor

Search papers
Search references

RSS
Latest issue
Current issues
Archive issues
What is RSS



Prikl. Diskr. Mat.:
Year:
Volume:
Issue:
Page:
Find






Personal entry:
Login:
Password:
Save password
Enter
Forgotten password?
Register


Prikladnaya Diskretnaya Matematika, 2019, Number 44, Pages 12–33
DOI: https://doi.org/10.17223/20710410/44/2
(Mi pdm658)
 

Theoretical Backgrounds of Applied Discrete Mathematics

Donaghey's transformation: carousel effects and tame components

I. A. Pushkarev, V. A. Byzov

Vyatka State University, Kirov, Russia
References:
Abstract: In this paper, Donaghey's transformation is investigated. It is a combinatorial dynamical system, based on the combinatorial interpretations of Catalan numbers, with the transition function of it being the composition of the direct and the inverse bijections between cubic and non-cubic trees. The dynamical system under investigation operates on a finite set and is inversible; therefore it is a mere permutation of trees. The properties of the cycles of this permutation, called the orbits, are studied in terms of permutation of structural elements of trees. In the course of studies, the systematic initiation of particular effects is indicated. These particular effects are referred to as “carousel”: it is the movement of objects from one classification category to another, typical of natural classifications. In this form, they look as an indicator of system complexity. Two new carousel effects for structural elements, referred to as triads and germs, are described. The carousel effect for triads is used for the detection of two families of trees; the lengths of all tree arcs in the first family are equal to one; in the second family, they are equal to two. Here, the term “the arcs of the orbit” is used to denote its fragments between two trees, which have no left subtrees. Therefore, the properties of the arcs are the global properties of the orbits, and the carousel effects are local. The corresponding enumeration problems are solved: it is demonstrated that the number of trees of the first family increases as $\dfrac{C}{n^{3/2}}\left(\dfrac{5}{2^{4/3}-2^{2/3}+1}\right)^n$, the number of trees of the second family — as $\dfrac{3^{n+1/2}}{n^{3/2}\sqrt{\pi}}$ ($n$ is the number of triads). The paper presents the family of cycles with the length 6, which are different from the ones discovered by L. Shapiro, the number of which increases as $\Theta(n^2)$, and the family of cycles with length 9, the number of which increases as $\Theta(2^{n/2})$. A class of orbits with the lengths growing up as $\Theta(n^2)$ is detected.
Keywords: Catalan numbers, plane cubic trees, Donaghey's transformation, carousel effect, tame components.
Bibliographic databases:
Document Type: Article
UDC: 519.115.1
Language: Russian
Citation: I. A. Pushkarev, V. A. Byzov, “Donaghey's transformation: carousel effects and tame components”, Prikl. Diskr. Mat., 2019, no. 44, 12–33
Citation in format AMSBIB
\Bibitem{PusByz19}
\by I.~A.~Pushkarev, V.~A.~Byzov
\paper Donaghey's transformation: carousel effects and~tame~components
\jour Prikl. Diskr. Mat.
\yr 2019
\issue 44
\pages 12--33
\mathnet{http://mi.mathnet.ru/pdm658}
\crossref{https://doi.org/10.17223/20710410/44/2}
\elib{https://elibrary.ru/item.asp?id=38555959}
Linking options:
  • https://www.mathnet.ru/eng/pdm658
  • https://www.mathnet.ru/eng/pdm/y2019/i2/p12
  • Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Прикладная дискретная математика
    Statistics & downloads:
    Abstract page:178
    Full-text PDF :106
    References:28
     
      Contact us:
     Terms of Use  Registration to the website  Logotypes © Steklov Mathematical Institute RAS, 2024