1. Theon Biography of theon of alexandria (335405) theon of alexandria worked inAlexandria as a teacher of mathematics and astronomy. http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Theon.html

Theon of Alexandria Born: about 335 in (possibly) Alexandria, Egypt Died: about 405 Previous (Chronologically) Next Biographies Index Previous (Alphabetically) Next Main index Version for printing Theon of Alexandria worked in Alexandria as a teacher of mathematics and astronomy. We know from his own writings that he observed a solar eclipse on 16 June 364 at Alexandria and a lunar eclipse, again in Alexandria, on 25 November 364. We also know that he made a list of Roman consuls which he continued to make until 372. There is a reference in the Suda Lexicon (a work of a 10 th century Greek lexicographer) which states that Theon of Alexandria lived under the Emperor Theodosius I (who reigned from 379 to 395). These dates are therefore consistent. The Suda also states that Theon was a member of the Museum. which was an institute for higher education set up in Alexandria in 300 BC. Again this is possible, but the Museum certainly did not exist much beyond the time of Theon if indeed it existed in his time. On balance it seems reasonable to accept that he was one of its last members. Theon was the father of Hypatia and it certainly seems to be the case that he died before she was murdered in 415. There does not seem to be any other evidence which would let us give a more accurate guess of the dates of his birth and death other than these few indications of times when he was certainly working.

2. Theon Of Alexandria Name Theon. Occupation From Alexandria Son of Occupation Dates fl. 360 AD http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

3. References For Theon References for the biography of theon of alexandria. References for Theon ofAlexandria. Version for printing. Biography in Dictionary of Scientific http://www-groups.dcs.st-and.ac.uk/~history/References/Theon.html

References for Theon of Alexandria Version for printing Biography in Dictionary of Scientific Biography (New York 1970-1990). Books: T L Heath, A History of Greek Mathematics (2 Vols.) (Oxford, 1921). O Neugebauer, A history of ancient mathematical astronomy (New York, 1975). A Rome, (Rome, 1943). A Tihon (ed.), Livre I (Vatican City, 1985). A Tihon (ed.), Livre II, III (Vatican City, 1991). Articles: Sudhoffs Arch. D Pingree, An illustrated Greek astronomical manuscript : Commentary of Theon of Alexandria on the 'Handy tables' and scholia and other writings of Ptolemy concerning them, J. Warburg Courtauld Inst. A Rome, The calculation of an eclipse of the sun according to Theon of Alexandria, in Proceedings of the International Congress of Mathematicians 1950 (Providence, R. I., 1952), 209-219. Arch. Internat. Hist. Sci. Janus Main index Birthplace Maps Biographies Index History Topics ... Anniversaries for the year JOC/EFR April 1999 School of Mathematics and Statistics University of St Andrews, Scotland The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/References/Theon.html

4. Theon Von Alexandria Theon von Alexandria Seite aus einem deutschsprachigen OnlinePhilosophenlexikon. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

5. TMTh:: THEON OF ALEXANDRIA theon of alexandria (fl. c. 360 AD). Life Father of the celebrated mathematicianHypatia, who worked with him, Theon lived during the reign of Theodosius http://www.tmth.edu.gr/en/aet/1/94.html

Home Ancient Greek Scientists AGRICULTURALISTS ARCHITECTS ... PHYSICISTS MATHEMATICIAN, ASTRONOMER THEON OF ALEXANDRIA (fl. c. 360 AD) Life Father of the celebrated mathematician Hypatia, who worked with him, Theon lived during the reign of Theodosius the Great. He was the director of the "Museum" (University and Library) of Alexandria, and taught at the school where Euclid taught. Commentaries on his work survive in many texts (Suidas - Lexicon, 950 AD). He wrote a total of 13 books, of which only the first book of the "Commentary on the Treatise of Ptolemy" and a few other fragments are extant. Work His principal works are: "Mathematics" (geometry). "Arithmetic" "On signs and divinations of birds" "On the rising of Sirius" (the "Dog-star") "On the flooding of the Nile" "Commentary on the Treatise of Ptolemy, Convenient Rule" "Commentary on Ptolemy's Almagest" "Euclid's Elements": Published by Theon (~ 364 AD) and constantly in circulation world-wide until 1814 (1450 years!). Euclid's method was considered the best, because it was adapted to the needs of students. "Equinoctial shift": Accepts the figure given by Ptolemy of 10 a century. It should be noted that in the view of some astronomers the shift is not progressive, but is confined to a variation of 8? of arc.

6. Theon Of Alexandria - Wikipedia, The Free Encyclopedia theon of alexandria http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

7. Theon Of Alexandria - Wikipedia, The Free Encyclopedia theon of alexandria Theon was the father of the mathematician and pagan martyr Hypatia. Theon s most durable achievement may be his edition of http://en.wikipedia.org/wiki/Theon_of_Alexandria

Wikimedia needs your help in the final days of its fund drive. See our fundraising page The Red Cross and other charities also need your help. Theon of Alexandria From Wikipedia, the free encyclopedia. Theon (c. - c. AD) was a scholar and the last director of the Library of Alexandria in the Museion , until it was closed by the patriarch Theophilus on order of the emperor Theodosius in AD. Theon was the father of the mathematician and "pagan" martyr Hypatia Theon's most durable achievement may be his edition of Euclid 's Elements , published around and authoritative into the 19th century. The bulk of Theon's work, however, consisted of commentaries on important works by his hellenistic predecessors. These included a "conferences" ( Synousiai ) on Euclid, and commentaries ( Exegeseis ) on the "Manual Tables" and Almagest of Ptolemy , and on the technical poet Aratus Apparently he is the first author on the theory of "trepidation of the equinoxes", as an alternative to precession edit External links A more Complete Biography Retrieved from " http://en.wikipedia.org/wiki/Theon_of_Alexandria

8. Theon Biography of theon of alexandria (335405) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

9. Hypatia Theon himself was a well known scholar and a professor of mathematics at the University of Alexandria. Theon and Hypatia formed a strong bond http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

10. Theon Of Alexandria theon of alexandria. Retrieved from wikipedia. All text is available under theterms of the GNU Free Documentation License http://www.mlahanas.de/Greeks/Bios/TheonOfAlexandria.html

Theon of Alexandria Theon (c. 335 - c. 405 AD) was a scholar and the last director of the Library of Alexandria in the Museion, until it was demolished by the patriarch Theophilus on order of the emperor Theodosius in 391 AD. He wrote some commentaries on important works by his hellenistic predecessors, notably the Almagest and the "Handy Tables" by Ptolemy . Apparently he is the first author on the theory of "trepidation of the equinoxes", as an alternative to precession. Theon was the father of Hypatia . Perhaps his most lasting achievement was his edition of Euclids Elements which was published in ~364. This edition remained in publication in some form until 1814 or an astonishing ~1450 years. Theon of Alexandria Retrieved from wikipedia All text is available under the terms of the GNU Free Documentation License Web www.mlahanas.de Ancient Greece Medieval Greece Modern Greece Science, Technology , Medicine Warfare Biographies Life ... Literature , History Science, Technology Literature Music Arts ... Statistics

11. Theon Of Alexandria theon of alexandria Theon (ca. 335 .. ca. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

12. Ancient Greek Optimization Problems and preserved by Pappus of Alexandria (pp ? e?a?d?e) and Theon of in the commentary of theon of alexandria on Book I of Ptolemy s Syntaxis; http://www.mlahanas.de/Greeks/Optimization.htm

Optimization Michael Lahanas Optimierungsprobleme im Antiken Griechenland Bees were endowed with a certain geometrical forethought .... There being, then, three figures which of themselves can fill up the space round a point, viz. the triangle, the square and the hexagon, the bees have wisely selected for their structure that which contains the most angles, suspecting indeed that it could hold more honey than either of the other two. Pappus of Alexandria Geometric Optimization Advertisement for a modern Optimization Tool As Geometry plays a important role in Greek Ancient Science it is not very surprising that optimization problems have been considered and solved. In Euclid's book III of the Elements there is a discussion of the greatest and least straight lines that can be drawn from a point to the circumference of a circle, and in book VI. (in a proposition generally omitted from editions of his works) the parallelogram of greatest area with a given perimeter. Of polygons of N sides with a given perimeter the regular polygon encloses the greatest area. Of two regular polygons of the same perimeter, that with the greater number of sides encloses the greater area.

13. Hypatia Of Alexandria According to the Byzantine encyclopedia The Suda, her father Theon was the last head of the Museum at Alexandria. http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

14. Encyclopedia Of Astronomy And Astrophysics » Theon Of Alexandria (c. 335–c theon of alexandria (c. 335–c. 395). DOI 10.1888/0333750888/4053; PublishedNovember 2000. Icon Full text (PDF, 21K) http://eaa.iop.org/index.cfm?action=summary&doc=eaa/4053@eaa-xml

15. Hypatia - Book List Books on Hypatia of Alexandria a bibliography by Howard A. Landman Contains articles on Hypatia (v.4, pp.644646) and Theon (v.2, p.702). http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

16. Theon Of Alexandria And Ptolemy's Handy Tables Title theon of alexandria and Ptolemy s Handy Tables Authors Tihon, Anne JournalAncient Astronomy and Celestial Divination. Dibner Institute studies in http://adsabs.harvard.edu/abs/1999aacd.book..357T

Smithsonian/NASA ADS Astronomy/Planetary Abstract Service Find Similar Abstracts (with default settings below Table of Contents Also-Read Articles Translate Abstract Title: Theon of Alexandria and Ptolemy's Handy Tables Authors: Tihon, Anne Journal: Ancient Astronomy and Celestial Divination. Dibner Institute studies in the history of science and technology. Edited by N.M. Swerdlow. Cambridge, MA: MIT Press, 1999., p.357 Publication Date: Origin: ADS Bibliographic Code: 1999aacd.book..357T Abstract Not Available Bibtex entry for this abstract Preferred format for this abstract (see Preferences) Find Similar Abstracts: Use: Authors Title Return: Query Results Return items starting with number Query Form Database: Astronomy/Planetary Instrumentation Physics/Geophysics arXiv e-prints Smithsonian/NASA ADS Homepage ADS Sitemap Query Form Preferences ... FAQ

17. Theon Von Alexandria Theon von Alexandria. Er war nur ein eher unbedeutender Mathematiker, der ein Buch ber das Astrolab, ein Ger t zur Ortsbestimmung von Sternen http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

18. Theon Of Alexandria Name Theon. Occupation. From Alexandria. Son of. Occupation. Dates fl.360 AD. Brief biography Dated by observations of solar eclipse of 16 June 364 http://www.swan.ac.uk/classics/staff/ter/grst/People/TheonAlex.htm

Name Theon Occupation: From Alexandria Son of: Occupation: Dates fl . 360 AD Brief biography Dated by observations of solar eclipse of 16 June 364 and lunar eclipse of 26 Nov 364. Daughter was Hypatia. Member of the Museum at Alexandria; the last attested member. All his extant works are commentaries or editions of classics in the maths and astronomy education of the time, meant for use by students. Contemporaries Emperor Theodosios I (reigned 379-95) Works References G J Toomer DSB T E Rihll Last modified: 11 March 2003

19. TMTh THEON OF ALEXANDRIA MATHEMATICIAN, ASTRONOMER theon of alexandria (fl. c. 360 AD) http://tmsyn.wc.ask.com/r?t=an&s=hb&uid=24312681243126812&sid=343126

20. Personal Names theon of alexandria search TmiWeb for this person theon of alexandria. Born c.335; died c. 405. theon of alexandria worked in Alexandria as a teacher http://euromusicology.cs.uu.nl:6334/dynaweb/info/persinfo/persons/@Generic__Book

Expand Search Personal names T Theon of Alexandria Theon of Alexandria Born: c. 335; died: c. 405. Theon of Alexandria worked in Alexandria as a teacher of mathematics and astronomy. More information Biography by Baldi (from Cronica

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