Eratosthenes: Difference between revisions
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Reverted edits by 74.78.240.138 (talk) to last version by Chewings72
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{{Infobox person
| name =
| image = Eratosthene.01.png
| alt = An etching of a man's head and neck in profile, looking to the left. The man has a beard and is balding.
| birth_date = 276 BC{{NoteTag|name=birth}}
| birth_place = [[Cyrene,
| death_date = 194 BC (around age 82){{NoteTag|name=death}}
| death_place = [[
| occupation = {{unbulleted list|Scholar|Librarian |Poet |Inventor}}
| known_for
}}
'''Eratosthenes of Cyrene''' ({{IPAc-en|ɛr|ə|ˈ|t|ɒ|s|θ|ə|n|iː|z}}; {{lang-el|Ἐρατοσθένης ὁ Κυρηναῖος|translit=Eratosthénēs ho Kurēnaĩos}}, {{IPA-el|eratostʰénɛːs|IPA}}; {{nowrap|{{circa}} 276 BC}}{{NoteTag|name=birth}} – {{nowrap|{{circa|195/194 BC|lk=no}}}}){{NoteTag|name=death}} was a Greek [[polymath]]: a [[Greek mathematics|mathematician]], [[geographer]], [[poet]], [[astronomer]], and [[music theory|music theorist]]. He was a man of learning, becoming the chief librarian at the [[Library of Alexandria]]. His work is comparable to what is now known as the study of [[geography]], and he introduced some of the terminology still used today.<ref name="roller" />
He is best known for being the first person to calculate
Eratosthenes was the founder of scientific [[chronology]]; he endeavoured to revise the dates of the chief literary and political events from the conquest of [[Troy]]. Eratosthenes dated [[Trojan War|The Sack of Troy]] to 1183 BC. In [[number theory]], he introduced the [[sieve of Eratosthenes]], an efficient method of identifying [[prime number | prime numbers]].
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