The attribution is held to be anachronistic however by J J O ' Connor and E F Robertson who name Theon of Alexandria as a more likely author.

* Theon of Alexandria, Greek mathematician, dies at age 70 ( approximate ), having been helped in his work by his daughter Hypatia.

* Theon of Alexandria, last director of the Library of Alexandria ( approximate date )

The mathematician and philosopher Hypatia of Alexandria was the daughter of the mathematician Theon Alexandricus ( ca.

In the 4th century, Greek scholar Theon of Alexandria observed that " candlelight passing through a pinhole will create an illuminated spot on a screen that is directly in line with the aperture and the center of the candle.

While Aristotle, Theon of Alexandria, Al-Kindi ( Alkindus ) and Chinese philosopher Mozi had earlier described the effects of a single light passing through a pinhole, none of them suggested that what is being projected onto the screen is an image of everything on the other side of the aperture.

* Theon of Alexandria, Greek mathematician, observes a solar eclipse ( June 16 ) and a lunar eclipse ( November 25 ).

* Theon of Alexandria, last director of the Library of Alexandria ( approximate date )

Besides Ptolemy, the list includes Proclus, who rejected precession, and Theon of Alexandria, a commentator on Ptolemy in the 4th century, who accepted Ptolemy's explanation.

Commentaries on the Almagest were written by Theon of Alexandria ( extant ), Pappus of Alexandria ( only fragments survive ), and Ammonius Hermiae ( lost ).

In his early youth he went to Alexandria, where he spent twelve years partly as a pupil of Theon, a rhetorician, and partly as a professor of rhetoric.

One of the epigrams attributed to him on the authority of Maximus Planudes is a eulogy on the celebrated Hypatia, daughter of Theon of Alexandria, whose death took place in 415.

In the fourth century AD Theon of Alexandria produced an edition of Euclid which was so widely used that it became the only surviving source until François Peyrard's 1808 discovery at the Vatican of a manuscript not derived from Theon's.

The biographical tradition of the tenth century Byzantine ( Suda ) defines Theon as " the man from the Mouseion "; however, both the Library of Alexandria and the Mouseion may not have existed in the fourth century as Ammianus Marcellinus ( Historia 22. 15, 12-13 ), writing in 378 refers to the Serapeum Library as thing of the past, destroyed in the time of Julius Caesar.

* G. J. Toomer's, " Theon of Alexandria ," in Dictionary of Scientific Biography 13: 321 – 325.

de: Theon von Alexandria

The Suda ( a 10th century Byzantine Greek encyclopedia of known inaccuracy ) states that Pappus was of the same age as Theon of Alexandria, who flourished in the reign of Emperor Theodosius I ( 372 – 395 AD ).

Theon of Alexandria in the 4th century AD includes trepidation when he wrote Small Commentary to the Handy Tables.

It is named for Theon of Alexandria, a 4th-century Greek astronomer and mathematician.

Ptolemy refers several times in his Almagest to a Theon who made observations at Alexandria, but it is uncertain whether he is referring to Theon of Smyrna.

A different date is given by a marginal note to a late 10th century manuscript ( a copy of a chronological table by the same Theon ), which states, next to an entry on Emperor Diocletian ( reigned 284 – 305 AD ), that " at that time wrote Pappus ".

Theon also wrote commentaries on Xenophon, Isocrates and Demosthenes, and treatises on style.

He is to be distinguished from the Stoic Theon, who lived in the time of Augustus and also wrote on rhetoric.

Theon wrote several commentaries on the works of mathematicians and philosophers of the time, including works on the philosophy of Plato.

Among later Middle Platonists there were Theon of Smyrna, who wrote a mathematical introduction to Plato, and Gaius ( 2nd century ) who was a teacher of Platonist philosophy.

In one of the commentaries on the Handy Tables, Theon states that certain ( unnamed ) ancient astrologers believed that the precession of the equinoxes, rather than being a steady unending motion, instead reverses direction every 640 years, and that the last reversal had been in 158 BC.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Theon Junior.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Theon Senior.

To cement his hold on Winterfell, Theon kills two common-born boys and tells Westeros that the Stark boys are dead.

To cement his claim on Winterfell, Theon kills a common-born boy and tells Westeros that Bran is dead.

The perfect numbers early on came to be treated as the measure of other numbers: those in which the sum of the divisors is greater than the number itself, as in 12, have — since as early as Theon of Smyrna, ca.

However Theon would still go on frequent visits to Paris.

In her Collected Works and occasional references in The Agenda, The Mother ( Mirra Alfassa ) describes Madame Theon as an extraordinary woman with great powers ; and refers to miraculous experiences at Tlemcen in Algeria, where she stayed on two extended visits to learn occultism under the tutelage of the Theons.

* In this sense Theon of Smyrna used it to describe a number which added to a polygonal number produces the next one of the same type.

Max Theon used the word " States " ( French Etat ) rather than " Planes ", in his cosmic philosophy, but the meaning is the same.

As Theon, the distinguished mathematician and father of Hypatia, herself a renowned scholar, was the last recorded scholar-member ( c. 380 ), it is likely that the Mouseion did not long survive the promulgation of Theodosius ' decree in 391 to destroy all pagan temples in the city .|

There is no mention of Euclid in the earliest remaining copies of the Elements, and most of the copies say they are " from the edition of Theon " or the " lectures of Theon ", while the text considered to be primary, held by the Vatican, mentions no author.

The theory of trepidation is presented by Theon as an alternative to precession.

The island's most famous site is the Sanctuary of the Great Gods, Greek Hieron ton Megalon Theon ; the most famous artifact of which is the 2. 5-metre marble statue of Nike, now known as the Winged Victory of Samothrace, dating from about 190 BC.

Later editors such as Theon often interpolated their own proofs of these cases.

Theon (, gen .: Θέωνος ; ca.

Theon was the father of the mathematician Hypatia whose murder was attributed by Socrates Scholasticus to " political jealousy " which instigated mob violence.

Theon describes but did not endorse this theory.