RANK _ _ _ _ _ _ _ _ _ _ _ _ operator
rankcalculates the rank of its matrix argument.
rank mat((a,b,c),(d,e,f)); 2
The argument to rank can also be a list of lists, interpreted either as a row matrix or a set of equations. If that form of input is chosen, the vectors in the result will be represented by lists as well. This additional input syntax facilitates the use of rank in applications different from classical linear algebra.