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Theon Of Alexandria
Theon of Alexandria (; grc, Θέων ὁ Ἀλεξανδρεύς; 335 – c. 405) was a Greek scholar and mathematician who lived in Alexandria, Egypt. He edited and arranged Euclid's '' Elements'' and wrote commentaries on works by Euclid and Ptolemy. His daughter Hypatia also won fame as a mathematician. Life Little is known about the life of Theon. He made predictions and observations of solar and lunar eclipses in 364 which show he was active at that time, and he is said to have lived during the reign of Theodosius I (379–395). The ''Suda'', a tenth-century Byzantine encyclopedia, calls Theon a "man of the Mouseion".SudaTheon θ205/ref> However, both the Library of Alexandria and the original Mouseion were destroyed in the first century BC and according to classical historian Edward J. Watts, Theon was probably the head of a school called the "Mouseion", which was named in emulation of the Hellenistic Mouseion that had once included the Library of Alexa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theon (1st Century BC)
Theon ( grc, Θέων; fl. 1st century BC) of Alexandria was a grammarian who taught at Rome in the reigns of the emperors Augustus and Tiberius. He succeeded Areius in this role, and was succeeded by Apion. He was the son of the grammarian Artemidorus of Tarsus and the head of the school at Alexandria. Theon was the author of a ''Lexicon to the Greek comedians'' (), which is quoted by Hesychius of Alexandria, Hesychius in the Prooemium to his own Lexicon. It is doubtful whether he was the author of the comic lexicon quoted by the Scholiast to Apollonius Rhodius. He is one of the authors from whose works the Scholia to Aristophanes were derived. A ''Commentary on the Odyssey'' by a certain Theon is quoted in the ''Etymologicum Magnum''. In one of the Scholia on Aristophanes, (the authenticity of which is debated) Theon is mentioned as one of the commentators on Apollonius Rhodius. It is possible, however, that one or both of these Commentaries on Homer and Apollonius, should be assi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hellenistic Period
In Classical antiquity, the Hellenistic period covers the time in Mediterranean history after Classical Greece, between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire, as signified by the Battle of Actium in 31 BC and the conquest of Ptolemaic Egypt the following year. The Ancient Greek word ''Hellas'' (, ''Hellás'') was gradually recognized as the name for Greece, from which the word ''Hellenistic'' was derived. "Hellenistic" is distinguished from "Hellenic" in that the latter refers to Greece itself, while the former encompasses all ancient territories under Greek influence, in particular the East after the conquests of Alexander the Great. After the Macedonian invasion of the Achaemenid Empire in 330 BC and its disintegration shortly after, the Hellenistic kingdoms were established throughout south-west Asia ( Seleucid Empire, Kingdom of Pergamon), north-east Africa ( Ptolemaic Kingdom) and South Asia ( Greco-Bactrian Kingdom, Indo-Greek ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euclid's Optics
Euclid's ''Optics'' ( grc-gre, Ὀπτικά), is a work on the geometry of vision written by the Greek mathematician Euclid around 300 BC. The earliest surviving manuscript of ''Optics'' is in Greek and dates from the 10th century AD. The work deals almost entirely with the geometry of vision, with little reference to either the physical or psychological aspects of sight. No Western scientist had previously given such mathematical attention to vision. Euclid's ''Optics'' influenced the work of later Greek, Islamic, and Western European Renaissance scientists and artists. Historical significance Writers before Euclid had developed theories of vision. However, their works were mostly philosophical in nature and lacked the mathematics that Euclid introduced in his ''Optics''. Efforts by the Greeks prior to Euclid were concerned primarily with the physical dimension of vision. Whereas Plato and Empedocles thought of the visual ray as "luminous and ethereal emanation", Euclid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handy Tables
Ptolemy's Handy Tables or ''Ptolemaiou'' ''Procheiroi kanones'' is a collection of astronomical tables that second century astronomer Ptolemy created after finishing the Almagest. The Handy Tables elaborated the astronomical tables of the Almagest and included usage instructions, but left out the theoretical commentary in order to facilitate practical computation. The work is considered of high significance during the late antiquity Late antiquity is the time of transition from classical antiquity to the Middle Ages, generally spanning the 3rd–7th century in Europe and adjacent areas bordering the Mediterranean Basin. The popularization of this periodization in English ha ... and in the Middle Eastern and Eastern Mediterranean medieval traditions.{{Cite book , last=Tihon , url=https://books.google.com/books?id=r1QazgEACAAJ , title=Ptolemaiou Procheiroi Kanones. Ptolemy's Handy Tables. Volume 1b: Tables A1-A2. Transcription and Commentary , date=2011 , publisher=Peeters , isbn=97 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexagesimal
Sexagesimal, also known as base 60 or sexagenary, is a numeral system with sixty as its base. It originated with the ancient Sumerians in the 3rd millennium BC, was passed down to the ancient Babylonians, and is still used—in a modified form—for measuring time, angles, and geographic coordinates. The number 60, a superior highly composite number, has twelve factors, namely 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60, of which 2, 3, and 5 are prime numbers. With so many factors, many fractions involving sexagesimal numbers are simplified. For example, one hour can be divided evenly into sections of 30 minutes, 20 minutes, 15 minutes, 12 minutes, 10 minutes, 6 minutes, 5 minutes, 4 minutes, 3 minutes, 2 minutes, and 1 minute. 60 is the smallest number that is divisible by every number from 1 to 6; that is, it is the lowest common multiple of 1, 2, 3, 4, 5, and 6. ''In this article, all sexagesimal digits are represented as decimal numbers, except where otherwise noted. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Little Heath
Sir Thomas Little Heath (; 5 October 1861 – 16 March 1940) was a British civil servant, mathematician, classical scholar, historian of ancient Greek mathematics, translator, and mountaineer. He was educated at Clifton College. Heath translated works of Euclid of Alexandria, Apollonius of Perga, Aristarchus of Samos, and Archimedes of Syracuse into English. Life Heath was born in Barnetby-le-Wold, Lincolnshire, England,being the third son of a farmer, Samuel Heath. He was educated at Caistor Grammar School and Clifton College before entering Trinity College, Cambridge, where he was awarded an ScD in 1896 and became an Honorary Fellow in 1920.He got first class honours in both the classical tripos and mathematical tripos and was the twelfth wrangler in 1882. In 1884 he took the Civil Service examination and became an Assistant Secretary to the Treasury, finally becoming Joint Permanent Secretary to the Treasury and auditor of the Civil List in 1913. He held the position till ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vatican Library
The Vatican Apostolic Library ( la, Bibliotheca Apostolica Vaticana, it, Biblioteca Apostolica Vaticana), more commonly known as the Vatican Library or informally as the Vat, is the library of the Holy See, located in Vatican City. Formally established in 1475, although it is much older—it is one of the oldest libraries in the world and contains one of the most significant collections of historical texts. It has 75,000 codices from throughout history, as well as 1.1 million printed books, which include some 8,500 incunabula. The Vatican Library is a research library for history, law, philosophy, science, and theology. The Vatican Library is open to anyone who can document their qualifications and research needs. Photocopies for private study of pages from books published between 1801 and 1990 can be requested in person or by mail. Pope Nicholas V (1447–1455) envisioned a new Rome with extensive public works to lure pilgrims and scholars to the city to begin its transf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theon Junior (crater)
Theon Junior is a lunar impact crater that is located just to the west-southwest of the crater Delambre. It forms a matching pair with Theon Senior, only a couple of crater diameters to the north-northwest. The crater is circular and bowl-shaped, with a small floor at the bottom of the high, sloping interior walls. It is named for Theon of Alexandria, a 4th-century Greek astronomer and mathematician. The crater is from the Eratosthenian period, which lasted from 3.2 to 1.1 billion Billion is a word for a large number, and it has two distinct definitions: *1,000,000,000, i.e. one thousand million, or (ten to the ninth power), as defined on the short scale. This is its only current meaning in English. * 1,000,000,000,000, i.e ... years ago. It is 17 kilometers in diameter and the difference in height at its rim and its deepest part is 3,580 meters. Satellite craters By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictionary Of Greek And Roman Biography And Mythology
The ''Dictionary of Greek and Roman Biography and Mythology'' (1849, originally published 1844 under a slightly different title) is an encyclopedia/biographical dictionary. Edited by William Smith, the dictionary spans three volumes and 3,700 pages. It is a classic work of 19th-century lexicography. The work is a companion to Smith's ''Dictionary of Greek and Roman Antiquities'' and '' Dictionary of Greek and Roman Geography''. Authors and scope The work lists thirty-five authors in addition to the editor, who was also the author of the unsigned articles. The other authors were classical scholars, primarily from Oxford, Cambridge, Rugby School, and the University of Bonn, but some were from other institutions. Many of the mythological entries were the work of the German expatriate Leonhard Schmitz, who helped to popularise German classical scholarship in Britain. With respect to biographies, Smith intended to be comprehensive. In the preface, he writes: Much of the value ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Smith (lexicographer)
Sir William Smith (20 May 1813 – 7 October 1893) was an English lexicographer. He became known for his advances in the teaching of Greek and Latin in schools. Early life Smith was born in Enfield in 1813 to Nonconformist parents. He attended the Madras House school of John Allen in Hackney. Originally destined for a theological career, he instead became articled to a solicitor. Meanwhile, he taught himself classics in his spare time, and when he entered University College London carried off both the Greek and Latin prizes. He was entered at Gray's Inn in 1830, but gave up his legal studies for a post at University College School and began to write on classical subjects. Lexicography Smith next turned his attention to lexicography. His first attempt was ''A Dictionary of Greek and Roman Antiquities'', which appeared in 1842, the greater part being written by him. Then followed the ''Dictionary of Greek and Roman Biography and Mythology'' in 1849. A parallel '' Dictionary of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almagest
The ''Almagest'' is a 2nd-century Greek-language mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy ( ). One of the most influential scientific texts in history, it canonized a geocentric model of the Universe that was accepted for more than 1,200 years from its origin in Hellenistic Alexandria, in the medieval Byzantine and Islamic worlds, and in Western Europe through the Middle Ages and early Renaissance until Copernicus. It is also a key source of information about ancient Greek astronomy. Ptolemy set up a public inscription at Canopus, Egypt, in 147 or 148. N. T. Hamilton found that the version of Ptolemy's models set out in the ''Canopic Inscription'' was earlier than the version in the ''Almagest''. Hence the ''Almagest'' could not have been completed before about 150, a quarter-century after Ptolemy began observing. Names The name comes from Arabic ', with ' meaning "the", and ''magesti'' bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plotinus
Plotinus (; grc-gre, Πλωτῖνος, ''Plōtînos''; – 270 CE) was a philosopher in the Hellenistic philosophy, Hellenistic tradition, born and raised in Roman Egypt. Plotinus is regarded by modern scholarship as the founder of Neoplatonism. His teacher was the self-taught philosopher Ammonius Saccas, who belonged to the Platonism, Platonic tradition. Historians of the 19th century invented the term "neoplatonism" and applied it to refer to Plotinus and his philosophy, which was vastly influential during Late Antiquity, the Middle Ages, and the Renaissance. Much of the biographical information about Plotinus comes from Porphyry (philosopher), Porphyry's preface to his edition of Plotinus' most notable literary work, ''The Enneads''. In his Metaphysics, metaphysical writings, Plotinus described three fundamental principles: Henology, the One, Nous, the Intellect, and the wikt:psyche#English, Soul. His works have inspired centuries of Paganism, Pagan, Jewish philosophy, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
