I have a large matrix with more columns than rows. I have attempted to row reduce the matrix using Mathematica's
RowReduce command. I have been able to do this successfully, but it has taken quite a long time, I think because I'm doing it algebraically rather than numerically (I need to do it this way).
In actual fact I only need the first few rows of the row-reduced matrix (where the algebraic form of the terms is simpler). Is there any way of carrying out a partial row reduction so that I can get the first few rows of the row-reduced matrix without using up all the additional time to do the full process?
Thanks in advance for any help.