In Octave, how do I specify that the solution to a matrix equation should be over integers?
I.e., Given matrix $A$, vectors $x$ and $b$; $Ax=b$. Find vector $x$($=\frac{b}{A}$) such that all its entries are integers. While I'm primarily concerned with Octave, your answer may alternatively consider Wolfram|Alpha, or any other software available with a free online interface. If discussing Wolfram|Alpha or other systems, please also explain how to load a sparse matrix, which is currently in row, col, value format (i.e., I would prefer to do minimal format conversions).