This is documentation for Mathematica 5, which was
based on an earlier version of the Wolfram Language.

 RowReduce RowReduce[m] gives the row-reduced form of the matrix m. Example: RowReduce[3, 1, a, 2, 1, b] . RowReduce performs a version of Gaussian elimination, adding multiples of rows together so as to produce zero elements when possible. The final matrix is in reduced row echelon form. If m is a non-degenerate square matrix, RowReduce[m] is IdentityMatrix[Length[m]]. If m is a sufficiently non-degenerate rectangular matrix with rows and more than columns, then the first columns of RowReduce[m] will form an identity matrix. RowReduce works on both numerical and symbolic matrices. RowReduce[m, Modulus -> n] performs row reduction modulo n. RowReduce[m, ZeroTest -> test] evaluates test[ m[[i, j]] ] to determine whether matrix elements are zero. See Section 3.7.8. Implementation Notes: see Section A.9.4. See also: LinearSolve, Inverse, NullSpace, GroebnerBasis. New in Version 1; modified in 3.