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Integrability, analyticity, isochrony, equilibria, small oscillations, and Diophantine relations: results from the stationary Burgers hierarchy

M Bruschi et al 2009 J. Phys. A: Math. Theor. 42 475202 (9pp)   doi: 10.1088/1751-8113/42/47/475202  Help

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M Bruschi1,2, F Calogero1,2 and R Droghei3
1 Dipartimento di Fisica, Università di Roma 'La Sapienza', 00185 Roma, Italy
2 Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Italy
3 Dipartimento di Fisica, Università Roma Tre, Italy
E-mail: mario.bruschi@roma1.infn.it, francesco.calogero@roma1.infn.it, francesco.calogero@uniroma1.it and droghei@fis.uniroma3.it

Abstract. An isochronous system is introduced by modifying the Nth ODE of the stationary Burgers hierarchy, and then, by investigating its behaviour near its equilibria, neat Diophantine relations are identified, involving (well-known) polynomials of arbitrary degree having integer zeros, or equivalently matrices the determinants of which yield such polynomials. The basic idea to arrive at such relations is not new, but the specific application reported in this paper is new, and it is likely to open the way to several analogous new findings.

PACS numbers: 02.10.Yu, 02.30.Ik, 02.30.Gp, 02.30.Hq

Print publication: Issue 47 (27 November 2009)
Received 18 July 2009
Published 4 November 2009

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