colm photo
Colm Mulcahy is a mathemagician, a professor at Spelman College, and a visiting professor  at American University.

He is widely known as an inventor of astonishing card tricks based on mathematics, and for his writing and presentations on the topic.  In particular, he is the author of ...
book cover MAA huff post logo
The new CRC Press book
Mathematical Card Magic

Card Colm: A Mathematical
Association of America Blog

A Huffington Post Blog


He tweets as @CardColm.