A function ?f is continuous at the point ?p. This definition needs work. It will be something like this(forall (?x ?epsilon)
(=> (< (norm (value ?f ?p) (value ?f ?x)) ?epsilon)
(exists (?delta)
(< (norm (- ?x ?p) ?delta)))))
(=> (Continuous-At $X $Y) (Function $X)) (<=> (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))))))