Since is a FixedInterval is always completely determined by its type, there are several set operations that we know explicitly. I tried to think of all combinations and added them, mainly because in other code elsewhere I want the intersection of a ChebyshevInterval with itself to remain a ChebyshevInterval, and currently that is not the case (the generic code returns a generic closed interval [-1,1]).
Since is a
FixedIntervalis always completely determined by its type, there are several set operations that we know explicitly. I tried to think of all combinations and added them, mainly because in other code elsewhere I want the intersection of aChebyshevIntervalwith itself to remain aChebyshevInterval, and currently that is not the case (the generic code returns a generic closed interval[-1,1]).