The Other Leonardo

[stoutfellow]

I just posted another slide show for one of my history of mathematics classes, about Leonardo of Pisa, who was, more than anyone else, responsible for Europe's adoption of Hindu-Arabic notation. At the end of it I drop the bomb: they've heard of him, under another name. His father's name was Bonaccio, and he was often referred to as "the son of Bonaccio" - in the Pisan dialect, "fi'Bonacci".

I love that one.