Eular's Formula for Polyhedra Mug
Eular's Formula for Polyhedra - Eular, 1751
A graph is a series of nodes connected by edges. In graphic theory, a planar graph is a graph that can be embedded in the plane i.e. it can be drawn on the plane in such a way that it's edges intersect only at their endpoints. It can be drawn in such a way that n edges cross each other. This equation is the basis of Graph Theory.
The perfect gift for anyone interested in the fields of Mathematics and Science.