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.
In maths, the Sieve of Eratosthenes is used to calculate what?
According to a press release from the Foundation for Research and Innovation, the Foundation and the directorate-general for European Coordination and Development Programmes as the national bodies responsible for the participation of Cyprus in the Horizon 2020 programme, announced the selection of the Eratosthenes: Excellence Research Centre for Earth Surveillance and Space-Based Monitoring of the Environment (Excelsior), coordinated by the Cyprus University of Technology (Tepak).
Notes: Named for 3rd-century BCE Greek mathematician and philosopher Eratosthenes, first scholar to calculate the circumference of the Earth.
Around 240 B.C., Eratosthenes estimated the diameter of the earth to within less than a percentage point of the currently accepted value.
Other mare craters, such as Lansberg, Eratosthenes, and Archimedes, formed earlier than the last lava flows that covered their ejecta.
"An ancient scholar named Eratosthenes the head of the famous library of Alexandria in Egypt even correctly approximated the circumference of the Earth using experimental measurements of shadows in two cities and some geometry.
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.
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.