Journal of Nonlinear Mathematical Physics

Volume 16, Issue 1, March 2009, Pages 105 - 116

Isochronous Dynamical System and Diophantine Relations I

Authors
F. Calogero*, , , S. Iona*, §
*Dipartimento di Fisica, Università di Roma, “La Sapienza”, Rome, Italy
Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Italy
Received 8 April 2008, Accepted 28 May 2008, Available Online 7 January 2021.
DOI
10.1142/S1402925109000091How to use a DOI?
Keywords
Dynamical systems; integrable; isochronous; Diophantine; matrices; eigenvalues; conjectures; nonlinear harmonic oscillators
Abstract

We identify a solvable dynamical system — interpretable to some extent as a many-body problem — and point out that — for an appropriate assignment of its parameters — it is entirely isochronous, namely all its nonsingular solutions are completely periodic (i.e., periodic in all degrees of freedom) with the same fixed period (independent of the initial data). We then identify its equilibrium configurations and investigate its behavior in their neighborhood. We thereby identify certain matrices — of arbitrary order — whose eigenvalues are all rational numbers: a Diophantine finding.

Copyright
© 2009 The Authors. Published by Atlantis Press and Taylor & Francis
Open Access
This is an open access article distributed under the CC BY-NC 4.0 license (http://creativecommons.org/licenses/by-nc/4.0/).

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Journal
Journal of Nonlinear Mathematical Physics
Volume-Issue
16 - 1
Pages
105 - 116
Publication Date
2021/01/07
ISSN (Online)
1776-0852
ISSN (Print)
1402-9251
DOI
10.1142/S1402925109000091How to use a DOI?
Copyright
© 2009 The Authors. Published by Atlantis Press and Taylor & Francis
Open Access
This is an open access article distributed under the CC BY-NC 4.0 license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - JOUR
AU  - F. Calogero
AU  - S. Iona
PY  - 2021
DA  - 2021/01/07
TI  - Isochronous Dynamical System and Diophantine Relations I
JO  - Journal of Nonlinear Mathematical Physics
SP  - 105
EP  - 116
VL  - 16
IS  - 1
SN  - 1776-0852
UR  - https://doi.org/10.1142/S1402925109000091
DO  - 10.1142/S1402925109000091
ID  - Calogero2021
ER  -