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Eratosthenes Of Cyrene:     more detail

Eratosthenes of Cyrene (Lecture on a master mind, British Academy) by P.M. Fraser, 1971-08-17 Cyrenean Greeks: Eratosthenes, Cyrene, Callimachus, Synesius, Carneades, Aristippus, Pheretima, Ladice, Eryxo, Lacydes of Cyrene ERATOSTHENES OF CYRENE (276 B.C.-194 B.C.): An entry from Gale's <i>World of Earth Science</i> Eratosthenes of Cyrene: An entry from Gale's <i>Science and Its Times</i> by Judson Knight, 2001

lists with details

81. Eratosthenes
    Erastosthenes (276 196 B.C.) eratosthenes invented a method for efficiently constructing tables of prime numbers. This method, the "Sieve of eratosthenes", It goes like this.  
    http://www.math.utah.edu/history/eratosthenes.html
    
    Extractions: Eratosthenes invented a method for efficiently constructing tables of prime numbers. This method, the "Sieve of Eratosthenes", It goes like this. First, write down a list of integers beginning with 2 and ending with some number, say, 20: Then mark all multiples of 2: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 x x x x x x x x x Move to the next unmarked number, which in this case is 3, then mark all its multiples: 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 x x x x x x x x x x x Continue in this fashion, marking all multiples of the next unmarked number until there are no new unmarked numbers. The final result is in fact the last table given, so the primes not exceeding 20 are

82. TheSolutionSite.com
    , Students will learnabout square roots by knowing about eratosthenes Sieve and prime factorization.Metadata. Square Roots Visited by eratosthenes.  
    http://www.thesolutionsite.com/lpnew_bin/UI_Metadata/public/1666

83. Eratosthenes
    eratosthenes (276 195 BC). eratosthenes used geometry to estimatethe circumference of the Earth. eratosthenes measured the altitude  
    http://astrosun.tn.cornell.edu/courses/astro201/eratosthenes.htm
    
    Extractions: Eratosthenes used geometry to estimate the circumference of the Earth. Eratosthenes measured the altitude of the noontime sun at Alexandria at its maximum on Jun 21st. On that date, the Sun is directly overhead at noontime at Syene, in southern Egypt (latitude = 23.5 degrees north). The zenith distance is the angle from the zenith to the point where the Sun was at noon; it is also 90 degrees minus the altitude. At Syene, the zenith distance was degrees; at Alexandria it was about 7 degrees. He knew how far it was from Alexandria to Syene, so he used geometry and the difference in zenith angle to estimate the size of the Earth. Eratosthenes also measured the tilt of the Earth axis by 23.5 degrees, which gives us the seasons

84. Nardia Symonds : Greek Mathematics
    In mathematical circles eratosthenes is famous for the method of findingprime numbers, known as the ‘Sieve of eratosthenes’.  
    http://www.maths.adelaide.edu.au/pure/pscott/history/nardia/symonds6.htm
    
    Extractions: Thales Pythagoras Zeno Euclid Eratosthenes Archimedes Eratosthenes of Cyrene BC Erathosthenes is known as an astronomer and a mathematician. The two things he is famous for are calculating the circumference of the Earth and the development of a method for calculating all prime numbers. His calculation for the circumference of the Earth was around 46,000km, which is remarkably close to the current measured value. Next page Greek Mathematics home page

85. History Of Mathematics Links: Sites Relating To Individual Mathematicians
    Donald Lancon, Jr.); Oliver Byrne's edition of Euclid; Eratosthenesof cyrene (Peter Alfeld, University of Utah); Archimedes Home Page  
    http://www.maths.tcd.ie/pub/HistMath/Links/People.html
    
    Extractions: Sites relating to Individual Mathematicians The following sites or sections of sites relate to the life and work of individual mathematicians. Other sites which provide biographical information on substantial numbers of mathematicians are listed under Biographies of Mathematicians , and under Biographies of Scientists The listing below is in approximately chronological order. Back to:

86. 302main03.html
    http://www.ma.utexas.edu/users/mks/302/302main03.html

87. The Famous Mathematician Internet Project
    The Famous Mathematician Internet Project. Mathematics is a living,breathing, vibrant discipline connected to many walks of life. .  
    http://198.190.226.3/users/ham/famousmath.html

88. Project SUCCEED-HI: For Students!
    Stimulating Understanding of Computational science through Collaboration, Exploration,Experiment, and Discovery for students with Hearing Impairments.  
    http://www.shodor.org/succeedhi/succeedhi/sieve/teacher/Resources.html
    
    Extractions: S timulating U nderstanding of C omputational science through C ollaboration, E xploration, E xperiment, and D iscovery for students with H earing I mpairments a collaboration of the Shodor Education Foundation, Inc. , Eastern North Carolina School for the Deaf, Barton College , the National Technical Institute for the Deaf , and Interpreters, Inc. Home Project Proposal For Students! ... Resources For Teachers! The Sieve of Eratosthenese This page has additional background material and links to resources that may help you prepare for and extend the lesson. External Links and Resources

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