List of Symmetries for a List of Distributions
Create a list of symmetries for a list of distributions
Objects from the Class
Objects can be created by calls of the form
More frequently they are created via the generating function
"list", from data part.
"vector", by class
new("DistrSymmList", list(NoSymmetry(), SphericalSymmetry(SymmCenter = 1), EllipticalSymmetry(SymmCenter = 2)))