Robert Recorde Scientist
Robert Recorde (ca. 1512–1558) was a Welsh physician and mathematician. He invented the "equals" sign (=) and also introduced the pre-existing "plus" sign (+) to English speakers in 1557.
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Robert Recorde on Wikipedia
External resources
- http://141.14.236.86/cgi-bin/archim/dict/hw?lemma=RECORDE&step=entry&id=d006
- http://jeff560.tripod.com/mathword.html
- http://jeff560.tripod.com/relation.html
- http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Recorde.html
- http://www.100welshheroes.com/en/biography/robertrecorde
- http://www.1911encyclopedia.org/Robert_Recorde
- http://www.bbc.co.uk/dna/h2g2/alabaster/A7269690
- http://www.famouswelsh.com/cgibin/getmoreinf.cgi?pers_id=141
- http://www.renascentbooks.co.uk