|  |  D.14.1.8 arrSwapVar Procedure from libraryarr.lib(see  arr_lib).
 
Example: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]
 See also:
 arrLastVar;
 arrSwapVar;
 varMat;
 varNum.|  | 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
==> 
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