Tuesday, December 12, 2006

This man introduced the equal symbol

The name's Robert Recorde. A Welsh mathematician, he unleashed the 'is equal to' sign (=) in 1557. He settled for a 'pair of parallels' as 'no two things can be more equal'. The 'is equal to' sign beat two other symbols that were in vogue then: "//" and "[;". Picked from wikipedia and pbs.