Colm Mulcahy is Professor Emeritus at Spelman College, Atlanta USA, where he was on the faculty from 1988 to 2020. Colm is  an Irish mathematician, academic, columnist, book author, and public outreach speaker.  In addition to algebra, number theory, and geometry, his interests include mathemagical card magic and the culture of mathematics–particularly the contributions of Irish mathematicians and also the works of iconic mathematics writer Martin Gardner. Colm is a recognised expert in recreational maths. He worked with Maths Week Ireland for several years.   He has blogged for the Mathematical Association of America, The Huffington Post, Scientific American, and (aperiodically) for The Aperiodical; his puzzles have been featured in The New York Times. Colm serves on the Advisory Council of the Museum of Mathematics in New York City. As of January 2021, he is Chair of Gathering 4 Gardner, Inc.[6] He is the creator and curator of the Annals of Irish Mathematics and Mathematicians.