# Evaluating signs of determinants using single-precision arithmetic

1 PRISME - Geometry, Algorithms and Robotics
CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : We propose a method to evaluate signs of $2\times 2$ and $3\times 3$ determinants with $b$-bit integer entries using only $b$ and $(b+1)$-bit arithmetic respectively. This algorithm has numerous applications in geometric computation and provides a general and practical approach to robustness. The algorithm has been implemented and experimental results show that it slows down the computing time by only a small factor only with respect to floating-point calculation.
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https://hal.inria.fr/inria-00074367
Contributor : Rapport de Recherche Inria <>
Submitted on : Wednesday, May 24, 2006 - 3:09:42 PM
Last modification on : Monday, October 12, 2020 - 10:30:28 AM
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### Identifiers

• HAL Id : inria-00074367, version 1

### Citation

Francis Avnaim, Jean-Daniel Boissonnat, Olivier Devillers, Franco Preparata, Mariette Yvinec. Evaluating signs of determinants using single-precision arithmetic. [Research Report] RR-2306, INRIA. 1994. ⟨inria-00074367⟩

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