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
Mike Powers (soccer) Mike Powers (soccer) Mike Powers is a retired American soccer midfielder who played sixteen years with the Dallas Sidekicks. He also played in the second American Soccer League and the United Soccer League. Since 2012, Powers has been an assistant coach for the relaunched Dallas Sidekicks of the Major Arena Soccer League. Powers attended Rockhurst University, playing for the men/s soccer team from 1975 to 1980. He is a member of the school's Athletic Hall of Fame. In 1979, the Wichita Wings selected Powers in the Territorial Round (10th overall) of the Major Indoor Soccer League Draft. He played from