isMinimalRepresentative -- check whether an element of a Weyl group is the minimal representative of a coset

Ways to use isMinimalRepresentative :

• isMinimalRepresentative(Parabolic,WeylGroupElement) -- check whether an element of a Weyl group is the minimal representative of a right coset
• isMinimalRepresentative(Parabolic,WeylGroupElement,Parabolic) -- check whether an element of a Weyl group is the minimal representative of a double coset
• isMinimalRepresentative(WeylGroupElement,Parabolic) -- check whether an element of a Weyl group is the minimal representative of a left coset

For the programmer

The object isMinimalRepresentative is a method function.