A function ?f is continous over the interval ?beg ?end if it is defined and continuous-at every point between ?beg and ?end exclusive.
(Nth-Domain Continuous-Over 1 Unary-Scalar-Function-Quantity)
(<=> (Continuous-Over ?F ?Beg ?End)
(And (Unary-Scalar-Function-Quantity ?F)
(Member ?Beg (Exact-Domain ?F))
(Member ?End (Exact-Domain ?F))
(Forall (?X)
(=> (And (< ?Beg ?X) (< ?X ?End))
(And (Defined (Value ?F ?X))
(Continuous-At ?F ?X))))))