C-XSC Staggered Precision Interval Arithmetics: 
(C) Institut fuer Angewandte Mathematik, 
    Universitaet Karlsruhe, Germany

    Wissenschaftliches Rechnen/Softwaretechnologie, 
    Universitaet GH Wuppertal, Germany

    http://www.xsc.de/

This module introduces intervals into Rascal. You may construct intervals
like '[1,2]'. All standard functions are defined for intervals plus special
functions as 'inf', 'sup', 'mid', 'diam'. Mind that results of computations
with intervals are not the smallest possible intervals, but that the
solution is always within the result. Still most functions are accurate down
to the least significant bit.
