False position method ibn Luqa (10th century), an Arab mathematician from Baalbek, Lebanon. He justified the technique by a formal, Euclidean-style geometric proof. Within the tradition of medieval Muslim mathematics, double false position was known as "hisāb al-khaṭāʾayn" ("reckoning by two errors"). It was used for centuries to solve practical problems such as commercial and juridical questions (estate partitions according to rules of Quranic inheritance), as well as purely recreational problems. The algorithm was often memorized with the aid of mnemonics, such as a verse attributed to Ibn al-Yasamin and balance-scale diagrams explained by al-Hassar and Ibn al-Banna, all three being mathematicians of
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