Numbers may come and go, but &pgr; goes on forever. Archimedes knew that &pgr; was
a bit less than 31/7 way back in 250 BC—he understood more than the US
state of Indiana, which confusingly tried to legislate various values in 1897,
including 4. Pi: A Source Book by Lennart Berggren, and Jonathan and Peter
Borwein is a diverse collection of 70 facsimile papers, mostly in English, from
recreational maths to elliptical functions. Full of useful formulas and ideas,
it is a vast source of inspiration to any mathematician, A level and
upwards—a necessity in any maths library. Published by Springer Verlag,
£37.50, ISBN 0387949240.
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