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~~All other GNU Octave arithmetic functions are not guaranteed to produce accurate results, because they are based on C99 floating-point routines [http://www.gnu.org/software/libc/manual/html_node/Errors-in-Math-Functions.html#Errors-in-Math-Functions]. Their results depend on hardware, system libraries and compilation options. ~~The interval package handles ~~these ~~all functions with the help of the [http://www.mpfr.org/ GNU MPFR library]. With MPFR it is possible to compute system-independent, valid and tight ~~enclosure ~~enclosures of the correct results.

→What to expect: Removed fenv package

''Why is the interval package accurate?''

Some basic operations are provided by the C library on common platforms with directed rounding and correctly rounded result: plus, minus, division, multiplication and square root. ~~These ~~All other GNU Octave arithmetic functions are ~~used ~~not guaranteed to ~~build the most basic interval functions~~produce accurate results, because they are based on C99 floating-point routines [http://www.gnu.org/software/libc/manual/html_node/Errors-in-Math-Functions.html#Errors-in-Math-Functions]. Their results depend on hardware, system libraries and compilation options.

== Quick start introduction ==

240

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