Zhang-Zagier heights of perturbed polynomials

Christophe Doche

Journal de théorie des nombres de Bordeaux (2001)

  • Volume: 13, Issue: 1, page 103-110
  • ISSN: 1246-7405

Abstract

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In a previous article we studied the spectrum of the Zhang-Zagier height [2]. The progress we made stood on an algorithm that produced polynomials with a small height. In this paper we describe a new algorithm that provides even smaller heights. It allows us to find a limit point less than 1 . 289735 i.e. better than the previous one, namely 1 . 2916674 . After some definitions we detail the principle of the algorithm, the results it gives and the construction that leads to this new limit point.

How to cite

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Doche, Christophe. "Zhang-Zagier heights of perturbed polynomials." Journal de théorie des nombres de Bordeaux 13.1 (2001): 103-110. <http://eudml.org/doc/248716>.

@article{Doche2001,
abstract = {In a previous article we studied the spectrum of the Zhang-Zagier height [2]. The progress we made stood on an algorithm that produced polynomials with a small height. In this paper we describe a new algorithm that provides even smaller heights. It allows us to find a limit point less than $1.289735$ i.e. better than the previous one, namely $1.2916674$. After some definitions we detail the principle of the algorithm, the results it gives and the construction that leads to this new limit point.},
author = {Doche, Christophe},
journal = {Journal de théorie des nombres de Bordeaux},
language = {eng},
number = {1},
pages = {103-110},
publisher = {Université Bordeaux I},
title = {Zhang-Zagier heights of perturbed polynomials},
url = {http://eudml.org/doc/248716},
volume = {13},
year = {2001},
}

TY - JOUR
AU - Doche, Christophe
TI - Zhang-Zagier heights of perturbed polynomials
JO - Journal de théorie des nombres de Bordeaux
PY - 2001
PB - Université Bordeaux I
VL - 13
IS - 1
SP - 103
EP - 110
AB - In a previous article we studied the spectrum of the Zhang-Zagier height [2]. The progress we made stood on an algorithm that produced polynomials with a small height. In this paper we describe a new algorithm that provides even smaller heights. It allows us to find a limit point less than $1.289735$ i.e. better than the previous one, namely $1.2916674$. After some definitions we detail the principle of the algorithm, the results it gives and the construction that leads to this new limit point.
LA - eng
UR - http://eudml.org/doc/248716
ER -

References

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  1. [1] J. Dégot, J.-C. Hohl, O. Jenvrin, Calcul numérique de la mesure de Mahler d'un polynome par itérations de Graeffe. C.R. Acad. Sci. Paris320 (1995), 269-272. Zbl0834.30006MR1320369
  2. [2] C. Doche, On the spectrum of the Zhang-Zagier height. Math. Comp.70 (2001), no. 233, 419-430. Zbl0960.11047MR1681120
  3. [3] G.P. Dresden, Orbits of algebraic numbers with low heights. Math. Comp.67 (1998), 815-820. Zbl0926.11078MR1468942
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  6. [6] M.J. Mossinghoff, C.G. Pinner, J.D. Vaaler, Perturbing polynomials with all their roots on the unit circle. Math. Comp.67 (1998), 1707-1726. Zbl0909.12003MR1604387
  7. [7] C.J. Smyth, On the product of the conjugates outside the unit circle of an algebraic integer. Bull. London Math. Soc.3 (1971), 169-175. Zbl0235.12003MR289451
  8. [8] C.J. Smyth, On the measure of totally real algebraic integers II. Math. Comp.37 (1981), 205-208. Zbl0475.12001MR616373
  9. [9] D. Zagier, Algebraic numbers close both to 0 and 1. Math. Comp.61 (1993), 485-491. Zbl0786.11063MR1197513
  10. [10] S. Zhang, Positive line bundles on arithmetic surfaces. Ann. of Math.136 (1992), 569-587. Zbl0788.14017MR1189866

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