John Larry Kelly, Jr

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John Larry Kelly, Jr. (1923 – 1965), was a scientist who worked at Bell Labs. He is best known for formulating the Kelly criterion, an algorithm for maximally investing money.

He was born in Corsicana, Texas. He spent four years in the US Navy as a pilot during World War II before entering the University of Texas at Austin. He graduated with a PhD in Physics in 1953.

Contents 1 Speech synthesis: Enter Hal 9000 2 The Las Vegas connection: Information theory and its applications to Game theory 3 Death 4 References 4.1 Cited References 4.2 General References

[edit] Speech synthesis: Enter Hal 9000

In 1962 Kelly created one of the most famous moments in the history of Bell Labs by using an IBM 704 computer to synthesize speech. Kelly's voice recorder synthesizer vocoder recreated the song Daisy Bell, with musical accompaniment from Max Mathews. Arthur C. Clarke of 2001: A Space Odyssey fame was coincidentally visiting friend and colleague John Pierce at the Bell Labs Murray Hill facility at the time of this remarkable speech synthesis demonstration and was so impressed that he used it in one of the climactic scenes of his novel and screenplay for 2001: A Space Odyssey,^[1] where the HAL 9000 computer sings the same song as he is being put to sleep by astronaut Dave Bowman.^[2]

[edit] The Las Vegas connection: Information theory and its applications to Game theory

John Kelly was a remarkable character. Apart from being a Physicist he embodied certain stereotypical Texan character attributes being a tough guy, recreational gunslinger and a daredevil pilot all at the same time. He was also an associate of Claude Shannon at Bell Labs. Together they developed a Game theory type method based on the principles of information theory developed by Shannon.^[3] It is reported that Shannon and his wife Betty went to Las Vegas with M.I.T. mathematician Ed Thorp, and made very successful forays in roulette and blackjack using this method, later called the Kelly criterion, making a fortune as detailed in the book Fortune's Formula by William Poundstone.^[4] Shannon and Thorp also applied the same theory to the stock market with even better results.^[5]

[edit] Death

Kelly died of a stroke on a Manhattan sidewalk at the young age of 41 in 1965.^[6] It is also reported that he never used his own criterion to make money.^[6]

[edit] References

[edit] Cited References

[edit] General References