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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.
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 ...
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 .
Furthermore, the fact that Eratosthenes's measure corresponds precisely to 252,000 stadia might be intentional, since it is a number that can be divided by all natural numbers from 1 to 10: some historians believe that Eratosthenes changed from the 250,000 value written by Cleomedes to this new value to simplify calculations; [27] other ...
The sieve of Eratosthenes is a popular way to benchmark computer performance. [14] The time complexity of calculating all primes below n in the random access machine model is O ( n log log n ) operations, a direct consequence of the fact that the prime harmonic series asymptotically approaches log log n .
Eratosthenes (c. 276 – c. 194/195 BC), a Greek mathematician who calculated the circumference of the Earth and also the distance from the Earth to the Sun. Hipparchus (c. 190 – c. 120 BC), a Greek mathematician who measured the radii of the Sun and the Moon as well as their distances from the Earth. On the Sizes and Distances
Eratosthenes was a Greek scholar of the third century BC. It may also refer to: Eratosthenes (crater), a lunar impact crater named after him; Eratosthenes (statesman), an ancient Athenian statesman of the fifth century BC; Eratosthenes Seamount; Eratosthenes of Croton, winner of the Stadion race at the 51st Olympiad in 576 BC
The Catasterismi or Catasterisms (Greek Καταστερισμοί Katasterismoi, "Constellations" or "Placings Among the Stars" [1]) is a lost work by Eratosthenes of Cyrene. It was a comprehensive compendium of astral mythology including origin myths of the stars and constellations .