Euclid of Alexandria “The Element”Euclid, also known as Euclid of Alexandria, lived from 323 to 283 BC He was a famous Greek mathematician, often called the "father of geometry". The dates of his existence go back so long that the date and place of Euclid's birth and the date and circumstances of his death are unknown, and are only roughly estimated in proximity to the figures mentioned in references around the world. Alexandria was a broad teacher who taught lessons all over the world. He taught in Alexandria, Egypt. Euclid's best-known work is his treatise on geometry: The Elements. His Elements is one of the most influential works in the history of mathematics, serving as a reference textbook for teaching mathematics at different grade levels. His geometry work was used mostly from the time of publication until the late 19th and early 20th centuries. Euclid argued the principles of what is now called Euclidean geometry, which came from a small set of axioms about the Elements. Euclid was also famous for writing books using topics on perspective, conic sections, spherical geometry, number theory, and rigor. Many mathematicians established the theories found in The Elements; one of Euclid's achievements was to present them in a single, sensibly clear picture, making the elements easy to use and consult, including the mathematical proofs that remain the basis of mathematics many centuries later. Most of the theorems that appear in The Elements were not discovered by Euclid himself, but were the work of earlier Greek mathematicians such as Hippocrates of Chios, Theaetetus of Athens, Pythagoras, and Eudoxus of Cnidus. On the contrary, it is generally recognized that Euclid orders these theorems in a logical... middle of the paper... discrete way, because the radius can be indefinitely small. Of course, Euclid's The Elements is by far the most famous mathematical work. of classical antiquity, and also has the distinction of being the oldest continuously used mathematics textbook in the world. Very little information is known about the author, other than the fact that he lived in Alexandria around 300 BC. The topics of his works include geometry, proportion and number theory. Euclid demonstrated his concepts logically, using definitions, axioms, and postulates. Proclus Diadochus wrote a commentary on Euclid's Elements that kept Euclid's works in circulation. Euclid is believed to have founded a private school at the Library of Alexandria to teach mathematics enthusiasts like himself. There are other theories that suggest that Euclid continued to help these students write their own theories and books later in life.