False position method Moroccan origin. Leonardo of Pisa (Fibonacci) devoted Chapter 13 of his book "Liber Abaci" (AD 1202) to explaining and demonstrating the uses of double false position, terming the method "regulis elchatayn" after the "al-khaṭāʾayn" method that he had learned from Arab sources. In 1494, Pacioli used the term "el cataym" in his book "Summa de arithmetica", probably taking the term from Fibonacci. Other European writers would follow Pacioli and sometimes provided a translation into Latin or the vernacular. For instance, Tartaglia translates the latinized version of Pacioli's term into the vernacular "false positions" in 1556. Pacioli's term nearly disappeared in
Mark Francis (soccer) as its women’s soccer coach, a position he holds today. Francis has led Kansas to three NCAA Tournaments, and won the Big 12 in 2004. Mark Francis (soccer) Mark Francis (born in London, England) was an English-American soccer midfielder who played in the American Soccer League, American Indoor Soccer Association, SISL and USISL. He has also coached at the high school, college and professional levels. He is currently the women's head coach of the University of Kansas. Francis attended Southern Methodist University, playing on the men’s soccer team from 1983 to 1987. During his four seasons, he was a three