<P> Alexander of Villedieu was a French author, teacher and poet, who wrote text books on Latin grammar and arithmetic, everything in verse . He was born around 1175 in Villedieu - les - Poêles in Normandy, studied in Paris, and later taught at Dol in Brittany . His greatest fame stems from his versified Latin grammar book, the Doctrinale Puerorum . He died in 1240, or perhaps in 1250 . He was a Franciscan and a Master of the University of Paris . </P> <P> His Doctrinale puerorum, a versified grammar, soon became a classic . It was composed around 1200, and was all written in leonine hexameters . Even after several centuries, with the advent of printing, it appeared in countless editions in Italy, Germany and France . It was based on the older works of Donatus and Priscian . </P> <P> Alexander also wrote a short tract on arithmetic called Carmen de Algorismo--the Poem about Arithmetic, which also reached a wide distribution . A typical line from his Carmen de Algorismo, runs like this: </P> <Dl> <Dd> Extrahe radicem semper sub parte sinistra </Dd> </Dl>

Who wrote the square root of 3 poem