scalarProduct -- compute a scalar product (invariant by the Weyl group)

Ways to use scalarProduct :

• scalarProduct(RootSystem,Weight,Weight) -- the scalar product of two weights
• scalarProduct(RootSystem,ZZ,Weight) -- the scalar product of a fundamental weight and a weight
• scalarProduct(RootSystem,ZZ,ZZ) -- the scalar product of two fundamental weights

For the programmer

The object scalarProduct is a method function.