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D.15.1.8 arrSwapVar
Procedure from library arr.lib (see arr_lib).
- 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]
Example:
| 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
==>
| See also:
arrLastVar;
arrSwapVar;
varMat;
varNum.
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