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D.8.2.1 length2

Procedure from library interval.lib (see interval_lib).

Usage:
length2(I), I interval

Return:
length/size in measure sense

Example:
 
LIB "interval.lib";
ring R = 0,x,lp;
interval I = bounds2(0, 1);    I;
==> [0, 1]
==> 
length2(I);
==> 1
I = bounds2(-1/2, 3/7);        I;
==> [-1/2, 3/7]
==> 
length2(I);
==> 13/14

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