The AddRow(A, i, j, s) command replaces row i of A with row i + s * row j.  This command can also be called as AddRows(A, i, j, s).

The MultiplyRow(A, i, s) command replaces row i of A with s * row i.

The SwapRow(A, i, j) command interchanges rows i and j of A.  This command can also be called as SwapRows(A, i, j).