This is a guest blogpost by Emil Eifrem, CEO, Neo4j, in which he explains how an elegant solution to the mathematical puzzle to find the most efficient way of traversing the bridges in Prussia’s Koenigsberg resulted in graph theory.

It’s the anniversary this month (15 April) of Swiss mathematician Leonhard Euler’s (1707-1783) birth. While some of us already know him for introducing huge chunks of modern mathematical terminology and breakthrough work in mechanics, fluid dynamics, optics and astronomy, more and more of us are beginning to appreciate him for one of his lesser known achievements: inventing graph theory.

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