Geometrically, if A⊆E1, this means that the curve y=f(x) meets all horizontal lines y=q, for q between f(p) and \( f \left( p _ { 1 } \right)...Geometrically, if A⊆E1, this means that the curve y=f(x) meets all horizontal lines y=q, for q between f(p) and f(p1). For example, in Figure 13 in §1, we have a "smooth" curve that cuts each horizontal line y=q between f(0) and f(p1); so f has the Darboux property on [0,p1]. In Figures 14 and 15, there is a "gap" a…