Nicomachus, or Nicomachus of Gerasa, (Greek: Νικόμαχος; c. 60 – c. 120 CE) was an important ancient mathematician best known for his works Introduction to Arithmetic and Manual of Harmonics in Greek. He was born in Gerasa, in the Roman province of Syria (now Jerash, Jordan), and was strongly influenced by Aristotle. He was a Neopythagorean, who wrote about the mystical properties of numbers.
Little is known about the life of Nicomachus except that he was a Pythagorean who came from Gerasa. Historians consider him a Neopythagorean based on his tendency to view the numbers having mystical properties. The age in which he lived (c. 100 CE) is only known because he mentions Thrasyllus in his Manual of Harmonics, and because his Introduction to Arithmetic was apparently translated into Latin in the mid 2nd century by Apuleius. His Manual of Harmonics was addressed to a lady of noble birth, at whose request Nicomachus wrote the book, which suggests that he was a respected scholar of some status. He mentions his intent to write a more advanced work, and how the journeys he frequently undertakes leave him short of time.
Nicomachus (Greek: Νικόμαχος; fl. c. 325 BC), was the son of Aristotle.
The Suda — a massive 10th-century Byzantine encyclopedia of the ancient Mediterranean world — states that Nicomachus was from Stageira, was a philosopher, a pupil of Theophrastus, and, according to Aristippus, his lover. He may have written a commentary on his father's lectures in physics. Nicomachus was born to the slave Herpyllis, and his father's will commended his care as a boy to several tutors, then to his adopted son, Nicanor. Historians think the Nicomachean Ethics, a compilation of Aristotle's lecture notes, was probably named after or dedicated to Aristotle's son. Several ancient authorities may have conflated Aristotle's ethical works with the commentaries that Nicomachus wrote on them. Ancient sources indicate that Nicomachus died in battle while still a "lad".
Aristotle's father was also called Nicomachus.
Nicomachus may also refer to: