Euclid
Euclid (300 BC), Greek mathematician. All that is known of his life is that he taught mathematics at Alexandria in Egypt during the reign of Ptolemy I. Euclid wrote and compiled a number of works on mathematics, the most famous of which is the geometrical treatise called the Elements. His works, which remained unknown in Europe until over 1000 years after his death, subsequently became standard school textbooks; they were still used as such in the 20th century. According to the Greek philosopher Proclus, when asked by Ptolemy if geometry could be learned other than by studying the Elements. Euclid replied “There is no royal road to geometry”.
