'Comeback' stories of Mathematicians

Solution 1:

One fairly well-known example is Blaise Pascal who, following a vision in 1654, gave up scientific inquiry to devote himself to theology. Later in 1658, when he was unable to sleep due to a toothache, he undertook a significant investigation of the geometry of the cycloid that helped to distract him from the pain. The toothache subsided shortly thereafter, and Pascal went on to complete his study before once again abandoning mathematics. This can be regarded as a brief but historically noteworthy "comeback".

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