Joseph Madachy
Born(1927-03-16)March 16, 1927
Star Junction, Pennsylvania, USA
DiedMarch 27, 2014(2014-03-27) (aged 87)
Dayton, Ohio, USA
Known forJournal of Recreational Mathematics
Scientific career
Fieldsrecreational mathematics

Joseph Steven Madachy (March 16, 1927 – March 27, 2014) was a research chemist, technical editor and recreational mathematician. He was the lead editor of Journal of Recreational Mathematics[1] for nearly 30 years and then served as editor emeritus. He was owner, publisher and editor of its predecessor, Recreational Mathematics Magazine, which appeared from 1961 to 1964.

Early life and education

Madachy was born in Star Junction, Pennsylvania, to Steven and Anne Madachy.[2] He was raised in Cleveland, Ohio.[2] He became interested in recreational mathematics after reading Eugene Northrop's 1944 book, Riddles in Mathematics.[3] After service in World War II, he attended Western Reserve University on the G.I. Bill and earned a bachelor's and a master's in Chemistry.[2]

Career

Madachy moved to Dayton, Ohio, and worked for Mound Laboratories.[2] He made original contributions to the field of recreational mathematics.[4] In 1960 he wrote to recreational mathematician Martin Gardner, asking whether Gardner knew of any publications devoted solely to recreational mathematics, as he was considering starting such a project.[5] Gardner responded in the negative, including a box containing his correspondence and suggesting Madachy could use the addresses to promote the magazine.[5] From February 1961 to 1964 Madachy published the bimonthly Recreational Mathematics Magazine.[2][3]

Mathematics on Vacation

In 1967, Greenwood Press asked him to start the journal again under the title Journal of Recreational Mathematics, which was published by Baywood Publishing starting in 1973. He authored several books on recreational mathematics, including Mathematics on Vacation (1966),[6][7][8] Madachy's Mathematical Recreations[9] and Mathematical Diversions.[10] He served as the literary agent for Dmitri Borgmann's Language on Vacation.[11] Longtime colleagues and co-authors include Martin Gardner, Harry L. Nelson, and Isaac Asimov, and Solomon Golomb (with pentominos).

He worked with polyominoes,[5] pentominos,[12] prime numbers,[13][14] and amicable numbers. He worked developing mathematical concepts such as cryptarithmetic, used in cyber security applications.[15] He made contributions to Fibonacci series and narcissistic numbers[16][17][18] and devised puzzles using Fibonacci numbers.[19] His recreational mathematics work included areas in chess, magic squares[20] and calculator art.[21]

Madachy retired from editing Journal of Recreational Mathematics in 2000.[5]: 272 

Pentomino Puzzle Solutions

Madachy is mentioned in the Jack Reacher novel series in the book Never Go Back, which uses perfect digit-to-digit invariant numbers in the plot: "Such numbers had been much discussed by a guy called Joseph Madachy, who once upon a time had been the owner, publisher, and editor of a magazine called Journal of Recreational Mathematics."

Personal life

Madachy and his wife, Juliana, lived in Dayton, Ohio and had six children.[2]

References

  1. ↑ "Journal of Recreational Mathematics". baywood.com. Retrieved June 18, 2010.
  2. 1 2 3 4 5 6 "Joseph Steven Madachy Obituary - Dayton, OH". Dignity Memorial. Retrieved 2019-11-10.
  3. 1 2 Trigg, Charles W. (1 November 1961). "Recreational Mathematics Magazine by Joseph Madachy". Mathematics Magazine. 34 (7): 417–418. doi:10.2307/2687895. JSTOR 2687895.
  4. ↑ RECREATIONAL MATHEMATICS - The Fibonacci Quarterly
  5. 1 2 3 4 Schoen, Alan; Rodgers, Tom; Pegg, Ed Jr. (2009-02-26). Homage to a Pied Puzzler. CRC Press. ISBN 9781439865002.
  6. ↑ Liebeck, Pamela (1968). "Mathematics on Vacation". The Mathematical Gazette. 52 (382): 394. doi:10.2307/3611870. ISSN 0025-5572. JSTOR 3611870.
  7. ↑ Mathematics on Vacation by Joseph S. Madachy. Kirkus Reviews. 14 November 1966.
  8. ↑ Joseph S. Madachy, Mathematics on Vacation, Thomas Nelson & Sons Ltd. 1966
  9. ↑ Madachy, J. S., Madachy's Mathematical Recreations, New York: Dover, 1979.
  10. ↑ Hunter, J.A.H. and Madachy, J. S., Mathematical Diversions, New York: Von Nostrand, 1963.
  11. ↑ Scot Morris (October 1986). "Games". OMNI. 9 (1): 182–183.
  12. ↑ "Pentominos - Some Solved and Unsolved Problems", "The Journal of Recreational Mathematics". Baywood Publishing. July 1969. {{cite journal}}: Cite journal requires |journal= (help)
  13. ↑ Weisstein, Eric W. "Prime Magic Square". mathworld.wolfram.com.
  14. ↑ Madachy, J. S. "Magic and Antimagic Squares." Ch. 4 in Madachy's Mathematical Recreations. New York: Dover, pp. 85-113, 1979.
  15. ↑ "A Primer on Cryptarithmetic". cryptarithms.awardspace.us.
  16. ↑ Joseph S. Madachy, Mathematics on Vacation, Thomas Nelson & Sons Ltd. 1966, pages 163-175
  17. ↑ "Narcissistic Numbers". www.magic-squares.net.
  18. ↑ "Some New Narcissistic Numbers", "The Fibonacci Quarterly". The Fibonacci Association. April 1972. {{cite journal}}: Cite journal requires |journal= (help)
  19. ↑ "The Fibonacci Quarterly". 6 (1). The Fibonacci Association. February 1968. Retrieved 20 June 2012. {{cite journal}}: Cite journal requires |journal= (help)
  20. ↑ Pickover, Clifford A. (2003-12-29). The Zen of Magic Squares, Circles, and Stars: An Exhibition of Surprising Structures Across Dimensions. Princeton University Press. pp. 110–. ISBN 9780691115979. Retrieved 19 June 2012.
  21. ↑ "Calculator Art Contest", Journal of Recreational Mathematics, Baywood Publishing. July 1971
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