ARTIST BIO

Henry Segerman received his masters in mathematics from the University of Oxford, and his Ph.D. in mathematics from Stanford University. He is an associate professor in the Department of Mathematics at Oklahoma State University. His research interests are in three-dimensional geometry and topology, and in mathematical art and visualization. In visualization, he works in 3D printing, spherical video, virtual, and augmented reality. He is the author of the book "Visualizing Mathematics with 3D Printing".

29 puzzle:

In this sequel to the 15+4 puzzle, every vertex has five squares around it. This makes the puzzle considerably harder to solve. Even sliding a tile from one square of the frame to a neighbour can be difficult: the whole frame must be manipulated to get the two squares to be flat, possibly requiring many preparatory moves. There are no neat rows to put the numbers in for the solved state: instead the numbers spiral out from the center, each pointing to the number following it.