There is an apocryphal story about Leonhard Euler, a brilliant mathematician of the 19th century, in the court of Catherine the Great, the empress of Russia. Denis Diderot, the French philosopher, ...
The Swiss mathematician Leonhard Euler (1707–83) was all but blind when he moved to St Petersburg in 1766 for a second stint as the star of the Russian Imperial Academy of Sciences. He had lost vision ...
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