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MultiArrDerModule    --    set of generators of the module of logarithmic derivations of a multiarrangement of hyperplanes


Syntax 
MultiArrDerModule(MultiA: LIST): MAT

Description
This function returns the matrix whose columns are a set of generators of the module of logarithmic derivations of a multiarrangement of hyperplanes.

Example 
/**/ use QQ[x,y];	
/**/ MultiA := [[x,1], [x-y,3], [y,2]];
/**/ MultiArrDerModule(MultiA);
matrix( /*RingWithID(2200, "QQ[x,y]")*/
 [[x*y^2, x^3 -3*x^2*y],
  [x*y^2, -3*x*y^2 +y^3]])

See Also