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2000 BCE
Mathematical challenges of the 21st century announced
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1994 BCE
Wiles proves Fermat's Last Theorem
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1982 BCE
Madlebrot's "The fractal geometry of nature"
describes the theory of fractals and is largely responsible for the current interest in fractal geometry -
1977 BCE
Adelman, Rivest and Shamir introduce public-key codes
Introduced a system for passing secret messages using large primes and a key which could be published -
1976 BCE
Four color conjecture verified by computer
Ken Appel and Wolfgang Haken prove the four color conjecture with 1200 hours of computer time to examine 1500 conjectures -
1970 BCE
Matiyasevich shows Hilbert's tenth problem is unsolvable
Yuri Matiyasevich (1947 - ), a Russian mathematician, showed that "Hilbert's tenth problem" was unsolvable, namely that there is no general method for determining when polynomial equations have a solution in whole numbers. -
1963 BCE
Paul J. Cohen on the continuum hypothesis
Paul J. Cohen proves the independence of the axiom of choice and of the continuum hypothesis -
1961 BCE
Lorenz on chaotic behavior
Meteorologist, Edward Lorenz, discovered a simple mathematical system with chaotic behavior