History of algebra formula_8 Iamblichus goes on to describe how some systems of linear equations that are not in this form can be placed into this form. Euclid (Greek: ) was a Greek mathematician who flourished in Alexandria, Egypt, almost certainly during the reign of Ptolemy I (323–283 BCE). Neither the year nor place of his birth have been established, nor the circumstances of his death. Euclid is regarded as the "father of geometry". His "Elements" is the most successful textbook in the history of mathematics. Although he is one of the most famous mathematicians in history there are no new discoveries attributed
Patriarch Peter VII of Alexandria Patriarch Peter VII of Alexandria Petros VII (September 3, 1949 – September 11, 2004) was the Greek Orthodox Pope and Patriarch of Alexandria and all Africa from 1997 to 2004. During his reign, Petros VII was credited with reviving the Greek Orthodox churches in Africa by increasing the churches' attendance of about 250,000 people. Petros was born Petros Papapetrou () in Sichari, Kyrenia District, Cyprus on September 3, 1949. He was the oldest son of a Greek Orthodox family and both his father and grandfather were priests. At the age of 12, Petros enrolled at the Machairas Monastery. Then at