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Eratosthenes created a whole section devoted to the examination of Homer, and acquired original works of great tragic dramas of Aeschylus, Sophocles and Euripides. [6] Eratosthenes made several important contributions to mathematics and science, and was a friend of Archimedes. Around 255 BC, he invented the armillary sphere.
Eratosthenes of Athens (Ancient Greek: Ἐρατοσθένης) was one of the Thirty Tyrants elected to rule the city of Athens after the Peloponnesian War (431–404 BC). Having lost the war to the Spartans , the citizens of Athens elected thirty men as oligarchs .
Sieve of Eratosthenes: algorithm steps for primes below 121 (including optimization of starting from prime's square). In mathematics, the sieve of Eratosthenes is an ancient algorithm for finding all prime numbers up to any given limit.
Eratosthenes crater is a relatively deep lunar impact crater that lies on the boundary between the Mare Imbrium and Sinus Aestuum mare regions. It forms the western terminus of the Montes Apenninus mountain range.
On the Murder of Eratosthenes" is a speech by Lysias, one of the "Canon of Ten" Attic orators. The speech is the first in the transmitted Lysianic corpus and is therefore also known as Lysias 1 . The speech was given by a certain Euphiletos, defending himself against the charge that he murdered Eratosthenes, after he supposedly caught ...
However, Eratosthenes (c. 276 – c. 194/195 BC) was the first person to calculate the circumference of the Earth. Posidonius ( c. 135 – c. 51 BC ) also measured the diameters and distances of the Sun and the Moon as well as the Earth's diameter; his measurement of the diameter of the Sun was more accurate than Aristarchus', differing from ...
Against Eratosthenes" is a speech by Lysias, one of the ten Attic orators. In the speech, Lysias accuses Eratosthenes , a member of the Thirty Tyrants who ruled Athens following the Peloponnesian War , of the murder of his brother, Polemarchus (around 403 BCE).
The Method takes the form of a letter from Archimedes to Eratosthenes, [1] the chief librarian at the Library of Alexandria, and contains the first attested explicit use of indivisibles (indivisibles are geometric versions of infinitesimals).