Ed Pegg, Jr. is an expert on mathematical puzzles and is a self-described recreational mathematician. He creates puzzles for the Mathematical Association of America online at Ed Pegg, Jr.'s Math Games. His puzzles have also been used by Will Shortz on the puzzle segment of NPR'sWeekend Edition Sunday. In other work, he collaborated with Stephen Wolfram on A New Kind of Science (NKS), and contributes online to the associated forum. In 2004 he started assisting Eric W. Weisstein at Wolfram MathWorld.[1] He has made contributions to more than a hundred MathWorld articles.[2] A puzzle is a problem or enigma that challenges ingenuity. ... The Mathematical Association of America (MAA) is a professional society that focuses on undergraduate mathematics education. ... Will Shortz (b. ... Offical NPR logo National Public Radio (NPR) is an independent, private, non-profit membership organization of public radio stations in the United States. ... Weekend Edition is the name given to a set of American radio news magazines produced and distributed by National Public Radio (NPR). ... Stephen Wolfram (born August 29, 1959 in London) is a scientist known for his work in theoretical particle physics, cellular automata, complexity theory, and computer algebra, and is the creator of the computer program Mathematica. ... A New Kind of Science is a controversial book by Stephen Wolfram, published in 2002. ... Dr. Eric W. Weisstein Encyclopedist Dr. Eric W. Weisstein (born March 18, 1969, in Bloomington, Indiana) is a noted encyclopedist in several technical areas of science and mathematics. ... MathWorld is an online mathematics reference work, sponsored by Wolfram Research Inc. ...
January 31 is the 31st day of the year in the Gregorian calendar. ... 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the Anno Domini (common) era. ...
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