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
Mario Sanchez (soccer) Mario Sanchez (soccer) Mario Sanchez is a retired American soccer midfielder who is the former head coach of the SIU Edwardsville Cougars men's soccer team. He played professionally in the USISL and USL A-League, winning the 1996 and 1997 USISL championship with the Central Coast Roadrunners. Sanchez graduated from Etiwanda High School in 1993. He played soccer for the Alta Loma Soccer Club which won the 1992 U-17 National Championship. He attended the California State University, Fresno, playing on the men's soccer team from 1993 to 1997. In August 1996, he tore his anterior cruciate ligament in practice and lost