* two examples of filters for computing the sign of a determinant
* the second filter is based on an idea presented in
* "Interval arithmetic yields efficient dynamic filters for computational
- * geometry" by Brönnimann, Burnikel and Pion, 2001
+ * geometry" by Brönnimann, Burnikel and Pion, 2001
*
* Copyright 2003 Guillaume Melquiond
*