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Rank
Syntax
Rank(M:MODULE):INT
Rank(M:MAT):INT
Summary
rank of a module
Description
This function computes the rank of M.  For a module M this is defined
as the vector space dimension of the subspace generated by the generators
of M over the quotient field of the base ring -- contrast this with the
function NumComps which simply counts the number of components the module has.

Example

Use R ::= Q[x,y,z];
Rank(Module([x,y,z,0]));
1
-------------------------------
Rank(Module([[1,2,3],[2,4,6]]));
1
-------------------------------
Rank(Module([[1,2,3],[2,5,6]]));
2
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