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→What to expect: Typo & formatting
{| class="wikitable" style="margin: auto; align:right"
|+align="bottom" | Approximate runtime (wall clock time in seconds) on an <br/>Intel® Core™ i5-4340M CPU(2.9 GHz)
!Matrix dimension
!Interval <code>plus</code>
!Interval <code>inv</code>
|-
|align="right"| < 0.1
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|align="right"| 3.3
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|align="right"| < 0.1
|align="right"| < 0.1
|style="text-align:right; font-weight: bold; color:orange"| 32.3
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|style="text-align:right; font-weight: bold; color:red"| 142.1
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|align="right"| 15.6
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|style="text-align:right; font-weight: bold; color:orange"| 29.1
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|}
''Why is the interval package accurate?''
The GNU Octave builtin built-in floating-point routines are not useful for interval arithmetic: Their results depend on hardware, system libraries and compilation options.
The interval package handles all arithmetic 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 enclosures of the correct results.
