David S. Richeson

Contributing Columnist

Illustration showing a human figure sitting on a large straw, gazing at different topological figures.
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Topology 101: The Hole Truth

January 26, 2021

The relationships among the properties of flexible shapes have fascinated mathematicians for centuries.

An abstract illustration showing broken tools, cubes, numbers and other abstract representations of impossible math
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When Math Gets Impossibly Hard

September 14, 2020

Mathematicians have long grappled with the reality that some problems just don’t have solutions.

About the author

David S. Richeson is a professor of mathematics at Dickinson College. He is the author of Tales of Impossibility: The 2000-Year Quest to Solve the Mathematical Problems of Antiquity and Euler’s Gem: The Polyhedron Formula and the Birth of Topology.