### 13.13.8 Check if five points in space are cospherical: is_cospherical

The is_cospherical command takes as arguments a list or sequence of points.

is_cospherical returns 1 if the points are cospherical, it returns 0 if they are not.

Input:

is_cospherical([2,0,0],[0,2,0],[sqrt(2),sqrt(2),0],
[0,0,2],[2/sqrt(3),2/sqrt(3),2/sqrt(3)])

Output:

1

Input:

is_cospherical([2,0,0],[0,2,0],[1,1,0],[0,0,2],[1,1,1])

Output:

0