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D.15.32.3 boxSet

Procedure from library rootisolation.lib (see rootisolation_lib).

Usage:
boxSet(B, i, I); B box, i int, I interval

Return:
new box C where C[i]==I

Purpose:
modifies a single entry of a box

Example:
 
LIB "rootisolation.lib";
ring R = 0,(x,y,z),dp;
box B; B;
==> [0, 0] x [0, 0] x [0, 0]
B = boxSet(B, 2, bounds(-1,1)); B;
==> [0, 0] x [-1, 1] x [0, 0]
B = boxSet(B, 1, B[2]); B;
==> [-1, 1] x [-1, 1] x [0, 0]