David Fowler
Born	April 28, 1937(1937-04-28) Blackburn, England
Died	13 April 2004 (aged 66) Warwick
Residence	United Kingdom
Institutions	Manchester University University of Warwick
Alma mater	Gonville and Caius College, Cambridge
Known for	Greek mathematics

David Herbert Fowler (April 28, 1937 – April 13, 2004) was a historian of Greek mathematics who published work on pre-Eudoxian ratio theory (using the process he called anthyphaeresis). He disputed the standard story of Greek mathematical discovery, in which the discovery of the phenomenon of incommensurability came as a shock.

His thesis was that, not having the real numbers, nor division, the Greeks faced difficulties in defining rigorously the notion of ratio. They called ratio 'logos'. Euclid Book V is an exposition of Eudoxus's theory of proportion, which Eudoxus discovered about 350BC, and which has been described as the jewel in the crown of Greek mathematics. Eudoxus showed by a form of abstract algebra how to handle rigorously the case when two ratios are equal, without actually having to define them. His theory was so successful that, in effect, it killed off perfectly good earlier theories of ratio, and Fowler's aim had been to find the evidence for the rediscovery of these previous theories.

In particular Thaetetus (c 414-369BC) introduced a definition of ratio using a procedure called anthyphairesis, based on the Euclidean subtraction algorithm. Fowler developed his ideas in a series of papers, culminating in the book The Mathematics of Plato's Academy: A New Reconstruction, which was published in 1987. This book is based on a study of the primary sources and on their assimilation and transformation.

[edit] References

• Obituary in The Guardian, 3 May 2004 by Christopher Zeeman.
• Obituary in The Independent, 24 May 2004.

[edit] External links

• Bibliography
• Book Review of The Mathematics of Plato's Academy
• Memorial symposium organized in his honor at Warwick, 9 November 2004.