Singular

D.14.1.8 arrSwapVar

Usage:

arrSwapVar(A, i, j); arr A, ring_variables/integers i,j

Return:

[arr] A where variables i and j are swapped.

Note:

if i and/or j are integers the algorithm considers the variables variables(A)[i] and/or variables(A)[j]

LIB "arr.lib";
ring R = 0,(x,y,z),lp;
arr A  = ideal(x+1,x+y,z);
arrSwapVar(A,x,z);
==> _[1]=z+1
==> _[2]=y+z
==> _[3]=x
==>