Foundations of geometry possible exception of the parallel postulate) that any theorem proved from them was deemed true in an absolute, often metaphysical, sense. Today, however, many other geometries which are not Euclidean are known, the first ones having been discovered in the early 19th century. Euclid's "Elements" is a mathematical and geometric treatise consisting of 13 books written by the ancient Greek mathematician Euclid in Alexandria c. 300 BC. It is a collection of definitions, postulates (axioms), propositions (theorems and constructions), and mathematical proofs of the propositions. The thirteen books cover Euclidean geometry and the ancient Greek version of elementary number theory.
Antiochus (father of Seleucus I Nicator) numerous descendants through his son from the 3rd century BC until the 5th century AD and possibly beyond. Antiochus (father of Seleucus I Nicator) Antiochus (Greek: Ἀντίοχος; fl. 4th century BC) was a Macedonian man who lived during the time of Philip II of Macedon (ruled 359-336 BC). He originally came from Orestis, Macedonia. Antiochus served as an officer under Philip II, and gained distinction as a military general. Antiochus was from an upper noble family. His father was probably called Seleucus, his brother was called Ptolemy and he probably had a nephew called Seleucus. Antiochus married a Macedonian woman