Colm Mulcahy is professor of mathematics at Spelman College, in Atlanta, where he has taught since 1988. He trained in algebra, and has also written papers on CAGC and wavelets. Over the past decade, he has been at the forefront of publishing original "mathemagical" principles and effects, particularly in his long-running bi-monthly Card Colm for the Mathematical Association of America (MAA). His book Mathematical Card Magic: Fifty-Two New Effects (AK Peters/CRC Press) was published in Aug 2013.

He's blogged at the Aperiodical, Huffington Post and Scientific American, and some of his puzzles have appeared in blogs at the New York Times.

He's particularly active in Gathering for Gardner and the associated Celebration of Mind initiative. He was fortunate to know Gardner for the last ten years of his life, and is chairing the Martin Gardner Centennial Committee. He's also part of the team heading up Mathematics Awareness Month 2014.

In 1997, Colm received the MAA's Allendoerfer Award for excellence in expository writing, for an article on image compression using wavelets from Mathematics Magazine (Dec 1996). His interests are broad, and include algebra, number and geometry.

He earned a B.Sc. and M.Sc. in mathematical science from University College Dublin, in his native Ireland, and a Ph.D. from Cornell University for research in the abstract algebraic theory of quadratic forms, under Alex F.T.W. Rosenberg.

View Short Vitae
View Full Vitae


  • Presidential Award for Scholarly Achievement
    (Spelman College, May 2013)
  • Faculty Innovation and Initiative Award
    (Spelman College's Faculty Council, May 2011)
  • Fannie Lou Hamer Award
    (Spelman College Board of Trustees, for community service, Apr 2001)
  • Carl B. Allendoerfer Award
    (MAA prize for excellence in exposition writing, for "Plotting and Scheming with Wavelets", Aug 1997 )