Ingmar Lehmann

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Books by Ingmar Lehmann

A Biography of the World's Most Mysterious Number

By Alfred S. Posamentier and Ingmar Lehmann

Afterword by Herbert A. Hauptman

We all learned that the ratio of the circumference of a circle to its diameter is called pi and that the value of this algebraic symbol is roughly 3.14. What we weren't told, though, is that behind this seemingly mundane fact is a world of mystery, which has fascinated mathematicians from ancient...

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