All quadratic functions have the same type of curved graphs with a line of symmetry. The graph of the quadratic function y = a x 2 + b x + c is a smooth curve with one turning point.

The approximation of the Ihara zeta function via the normalized version on finite graphs in the sense of Benjamini and Schramm follows as a special case. Our framework not only unifies corresponding ...

Otto J. Karst, Semi-Complex Functions and Their Graphs, Mathematics Magazine, Vol. 35, No. 5 (Nov., 1962), pp. 282-288 ...