More accuracy at fixed precision

  • Authors:
  • Philippe Langlois

  • Affiliations:
  • Laboratoire MANO, Université de Perpignan, 52, avenue de Villeneuve, 66860 Perpignan Cedex, France

  • Venue:
  • Journal of Computational and Applied Mathematics - Special issue: Proceedings of the international conference on linear algebra and arithmetic, Rabat, Morocco, 28-31 May 2001
  • Year:
  • 2004

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Abstract

Several different techniques and software intend to improve the accuracy of results computed in a fixed finite precision. Here we focus on the CENA method that processes an automatic correction of the first-order effect of the rounding errors the computation generates. This method provides a corrected result and a bound of the residual error for a class of algorithms we identify. We present the main features of the CENA method and illustrate its interests and limitations with examples.