| A brief discussion of Euler's solution to the Königsburg Bridge Problem appears in Stoppard's play about espionage and quantum physics.
When a British physicist double-agent is accused of giving the Soviets secret information, he attempts to explain the situation to his superiors in an especially unhelpful way: through analogies to quantum physics (wave-particle duality, tunneling, double slit experiments, uncertainty, etc.)
In addition, one step towards a resolution of the problem involves analysis of a diagram drawn by another spy. The story of Euler and the bridges is related and used to explain that this particular diagram must show the positions of two people, and not just one.
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