Аңдатпа
The article shows the significance of signs +∞ and -∞ (infinity with signs) for a full exposition of some of the problematic materials in mathematics. With its help smoothness of the curve, specified by functions with finite and infinite derivatives at the points, is determined. The properties of the function f, with which you can set the smoothness of the curve Γ:y=f(x),xϵ[a;b], are indicated.