Theo Alexandrinus

**Theo Alexandrinus** (Graece Θέων ὁ Ἀλεξανδρεύς; Alexandriae circa annum 335 natus; ibidem circa annum 405) fuit antiquus philosophus mathematicus, astrologus Graecus, qui editionem Euclidis *Elementa* curavit ordinavitque, et commenta Euclidis ac Claudii Ptolemaeii operibus scripsit.

## Vita 
Theo vixit et docuit Alexandriae in Aegypto saeculo quarto, cum Hypatia filia, philosophiae perita. Ipse appellabatur divinus, ex divina *Gente Potitia,* sacrorum mysteriorum Herculis Invicti sacrae scientiae custos.

Theo nomine “vir Μουσειόντος” in Suda memoratur, titulo ad Musaeum Alexandrinum (quod a Christianis destruibitur) pertinente, cuius rector fuit, vel, aliis rumoribus, ad Serapeum, cum Musaeo confusum simili usu (iuxta eosdem fontes, illud a Christianis deletum est secundum edictum Theodosianum, cum bibliothecae excidii dies anticipanda ad tempora Aureliani imperatoris ac Zenobiae Palmyrensis reginae, inter quos fuit magna gravisque contentio anno 270 fere, aut protrahenda usque ad obsidionem Alexandriae ab Anir Ibn al-As anno 642 esset).

Filiam habuit Hypatiam, quae prima in historia nota femina mathematice memoratur et nota est ob finem tamquam victima aliquot monachorum Christianorum (monachorum Parabolanorum).

## Opera 
Theo, maxime notus ut scholarum philomatemathicarum conditor, multae edidit commentatae mathematicarum operum atque ad scientiam pertinentium editiones (ut, exempli gratia, *Elementa* Euclidis vel Ptolemaei *Syntaxis mathematica*) et de astrolabio libellum scripsit (eum ipsum, forte, inveniens). Neque obliviscenda editio eius in *Elementa* qua opera Euclidis omnia memoriae potuit plane tradi.

## Notae 
# Suda, Theon θ205.

#
# **^** C. Schiano, "Teone e il Museo di Alessandria," in *Quaderni di storia* 55 (2002): 129–143.
# **^** Confer Anne Tihon, ''Le 'Grand commentaire' de Théon d'Alexandrie aux 'Tables faciles' de Ptolémée*, Livre I, Città del Vaticano 1985; Livre II, III, Città del Vaticano 1991.
# **^** Frank J. Swetz, (1994), *Learning Activities from the History of Mathematics*, p. 18
# **^** T. L. Heath, (1921), *A History of Greek Mathematics*, Oxford, Vol. 1, p. 57.
# **^** *Salta a: a* *b* *c* *d* *e'' O'Connor, John J.; Robertson, Edmund F., «Theon of Alexandria», *MacTutor History of Mathematics archive*, University of St Andrews
# **^** Thomas Little Heath, *A history of Greek mathematics*, Oxford, The Clarendon Press, 1921.
# **^** *Salta a: a* *b* James Evans, (1998), *The History and Practice of Ancient Astronomy*, pagina 240 e nota 35. Oxford University Press. ISBN 0-19-509539-1.
# **^** *Salta a: a* *b* Anne Tihon, «Theon of Alexandria and Ptolemy's *Handy Tables*» in Noel M. Swerdlow, (1999), *Ancient Astronomy and Celestial Divination*, pagina 359. MIT Press. ISBN 0262194228.
# **^** *Salta a: a* *b* Alan Cameron, Jacqueline Long, (1993), *Barbarians and Politics at the Court of Arcadius*, pagina 45. University of California Press. ISBN 0520065506.
# **^** A. Mark Smith, (1999), *Ptolemy and the Foundations of Ancient Mathematical Optics*, pagina 16. American Philosophical Society. ISBN 0871698935.
# **^** *Salta a: a* *b* *c* John M. McMahon, «Theon of Alexandria», *Virginia Trimble*, Thomas Williams, Katherine Bracher (2007), *Biographical Encyclopedia of Astronomers*, pagine 1133-4. Springer
# **^** *Salta a: a* *b* James Evans, (1998), *The History and Practice of Ancient Astronomy*, pagina 276. Oxford University Press. ISBN 0-19-509539-1.
# **^** Smith, William; *Dictionary of Greek and Roman Biography and Mythology*, London (1873). "Theon"
# **^** James Evans, (1998), *The History and Practice of Ancient Astronomy*, pagina 156. Oxford University Press. ISBN 0-19-509539-1. Otto Neugebauer, "The Early History of the Astrolabe. Studies in Ancient Astronomy IX," *Isis* 40 (1949), pp. 240-56.
# **^** *Salta a: a* *b* James Evans, (1998), *The History and Practice of Ancient Astronomy*, pagina 90. Oxford University Press. ISBN 0-19-509539-1.

## Bibliographia 
*Tihon, Anne. 1985. ''Le 'Grand commentaire' de Théon d'Alexandrie aux 'Tables faciles' de Ptolémée'', Livre I, Città del Vaticano' tomi II et III, Città del Vaticano 1991.
*Tihon, Anne. 1999. ''Theon of Alexandria and Ptolemy's Handy Tables.* In *Ancient Astronomy and Celestial Divination,'' ed. N. M. Swerdlow, 357. Cantabrigiae Massachusettae: Dibner Institute studies in the history of science and technology.

## Nexus externi
Categoria:Astronomi Graeci antiqui
Categoria:Mathematici Graeci antiqui