Eratosthenes


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Related to Eratosthenes: Eratosthenes Sieve

E·ra·tos·the·nes

 (ĕr′ə-tŏs′thə-nēz′) Third century bc.
Greek mathematician, astronomer, and geographer who devised a map of the world, estimated the circumference of the earth and the distance to the moon and the sun, and constructed a method for finding prime numbers.

Eratosthenes

(ˌɛrəˈtɒsθɪˌniːz)
n
(Biography) ?276–?194 bc, Greek mathematician and astronomer, who calculated the circumference of the earth by observing the angle of the sun's rays at different places

Er•a•tos•the•nes

(ˌɛr əˈtɒs θəˌniz)

n.
276?–195? B.C., Greek mathematician and astronomer at Alexandria.

E·ra·tos·the·nes

(ĕr′ə-tŏs′thə-nēz′)
Third century b.c. Greek mathematician and astronomer. He is best known for making an accurate estimate of the circumference of the Earth by measuring the angle of the sun's rays at two different locations at the same time. Eratosthenes also invented a method for listing the prime numbers that are less than any given number.
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Noun1.Eratosthenes - Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the Moon and sun (276-194 BC)
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Barbicane, consulting his map, recognized Eratosthenes.
Soon Eratosthenes disappeared under the horizon without the projectile being sufficiently near to allow close observation.
He discussed Simmias the elephant hunter and other people at the court of Ptolemy; kingship, symposia, gift-exchange: parameters of friendship; an entertaining genre; technology and performance in Eratosthenes and Andreas; and Herophilus' pulse and Archimedes' mechanized mathematics.
News this week of the outcome at the Onisiphoros well generated all sorts of reaction, but for experts the main takeaway is that the gas find -- albeit a small one -- holds great promise for the future because it has scientifically confirmed the existence of a carbonate platform around the Eratosthenes Seamount south of the island.
It has attracted many of the most outstanding mathematicians in history including Euclid, Diophantus, Fermat, Legendre, Euler, Gauss, Dedekind, Jacobi, Eisenstein, Sieve of Eratosthenes and Hilbert all made immense contribution to its development.
Eratosthenes (230-195 BC) and Ptolemaus (2nd century) speak of Sinhaladipa.
This newly updated and expanded third addition of "The Handy Geography Answer Book" by Paul Tucci traces the history of geography from Eratosthenes and Alexander von Humboldt, to latitude and longitude, and the latest advances in the Global Positioning System (GPS).
In 245 BC, less than a century after Alexander the Great founded the city, Eratosthenes was appointed Head of the Great Library of Alexandria.
Helping students explore concepts such as the Sieve of Eratosthenes, tessellations, and the area of a circle, using new interactive Math Apps
So Eratosthenes must have formed after the last lava flows in this area.
Eratosthenes measured the circumference of the earth by measuring the length of the shadows at noon on the summer solstice.