The solution of a problem relating to the geometry of position
This is one of Euler's most famous papers: the Königsberg bridge problem. It is often cited as the earliest paper in both topology and graph theory. In it, Euler reduces the problem to an analysis of the degrees of vertices on a graph, eventually determining that the Königsberg bridge problem is unsolvable.
Original Source Citation
Commentarii academiae scientiarum Petropolitanae, Volume 8, pp. 128-140.
Opera Omnia Citation
Series 1, Volume 7, pp.1-10.