## Quick Reference

(1707–83)

Beyond comparison, the most prolific of famous mathematicians. He was born in Switzerland but is most closely associated with the Berlin of Frederick the Great and the St Petersburg of Catherine the Great. He worked in a highly productive period when the newly developed calculus was being extended in all directions at once, and he made contributions to most areas of mathematics, pure and applied. Euler, more than any other individual, was responsible for notation that is standard today. Among his contributions to the language are the basic symbols, *π*, *e* and *i*, the summation notation ∑ and the standard function notation *f*(*x*). His *Introductio in analysin infinitorum* was the most important mathematics text of the late eighteenth century. From the vast bulk of his work, one famous result of which he was justifiably proud is this:

*Subjects:*
Mathematics.

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