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
Lucas Mendes (soccer) Lucas Mendes (soccer) Lucas Mendes (born December 29, 1997) is an American soccer player who currently plays for FC Baltimore in the NPSL. Mendes is usually employed as a winger, but can be used as a striker or a central midfielder. Mendes won Gatorade Player of the Year award for boys' soccer in 2016. The award is a national-recognized award given to the best high school athlete in the nation. Mendes won the award while playing for Washington-Lee High School in Arlington, Virginia. Outside of playing for the Washington-Lee Generals boys' soccer team, Mendes also played for the D.C. United