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Little is known about Theodosius' life. The Suda (10th-century Byzantine encyclopedia) mentioned him writing a commentary on Archimedes' Method (late 3rd century BC), [1] and Strabo's Geographica mentioned mathematicians Hipparchus (c. 190 – c. 120 BC) and "Theodosius and his sons" as among the residents of Bithynia distinguished for their learning. [2]
The Spherics (Greek: τὰ σφαιρικά, tà sphairiká) is a three-volume treatise on spherical geometry written by the Hellenistic mathematician Theodosius of Bithynia in the 2nd or 1st century BC.
Theodosius II, sometimes nicknamed "the Younger", [3] became Eastern Roman Emperor at the age of seven following the death of his father Arcadius in 408. Praetorian Prefect Anthemius continued to act as a power behind the throne, during whose tenure the Theodosian Walls of Constantinople were completed.
Spherics (sometimes spelled sphaerics or sphaerica) is a term used in the history of mathematics for historical works on spherical geometry, [1] [2] exemplified by the Spherics (Ancient Greek: τὰ σφαιρικά tá sphairiká), a treatise by the Hellenistic mathematician Theodosius (2nd or early 1st century BC), [3] and another treatise of the same title by Menelaus of Alexandria (c. 100 AD).
Bithynia also contained Nicaea, noted for being the birthplace of the Nicene Creed. According to Strabo, Bithynia was bounded on the east by the river Sangarius (modern Sakarya river), but the more commonly received division extended it to the Parthenius, which separated it from Paphlagonia, thus comprising the district inhabited by the Mariandyni.
Overall, Theodosius, a skilled diplomat, made it clear that in practice he was the sole emperor of the two empires. [127] It was not until 15 April of 391 that Theodosius decided to return to the east, to deal with a family conflict between his eldest son Arcadius, now fourteen, and his second wife Galla.
Qusta ibn Luqa produced, personally revised, or supervised the translations of a number of works. These include works by Diophantus, Theodosius of Bithynia's Spherics, On Days and Nights, and On the places of habitation, Autolycus's On the moving sphere and On Risings and Settings, Hypsicles's On Ascensions, works by Aristarchus, Theophrastus’s Meteora, Galen’s catalogue of his books, Hero ...
The Edict of Thessalonica was jointly issued by Theodosius I, emperor of the East, Gratian, emperor of the West, and Gratian's junior co-ruler Valentinian II, on 27 February 380. [4] The edict came after Theodosius had been baptized by the bishop Ascholius of Thessalonica upon suffering a severe illness in that city. [7] IMPPP.