Tag: Alperin

Relativity Problem Revisited

A footnote was added to Finite Relativity— Background: Weyl on what he calls the relativity problem— "The relativity problem is one of central significance throughout geometry and algebra…

Wednesday August 19, 2009

Group Actions, 1984-2009 From a 1984 book review: "After three decades of intensive research by hundreds of group theorists, the century old problem of the classification of the…

Saturday August 6, 2005

For AndrĂ© Weil on the seventh anniversary of his death:  A Miniature Rosetta Stone In a 1940 letter to his sister Simone,  AndrĂ© Weil discussed a sort of…

Thursday August 4, 2005

Visible Mathematics, continued Today’s mathematical birthdays: Saunders Mac Lane, John Venn, and Sir William Rowan Hamilton. It is well known that the quaternion group is a subgroup of…

Wednesday May 4, 2005

The Fano Plane Revisualized:     or, The Eightfold Cube Here is the usual model of the seven points and seven lines (including the circle) of the smallest…