The American Mathematical Society's Feature Column is a monthly column written for a general audience and published by the AMS Public Awareness Office. I have written for the Feature Column from 2005 to the present.

2020

Pooling strategies for COVID-19 testing

Transmitting Data with Polar Codes

What's the 411?

2019

You're in for a Shock

Puppies, Kittens, and the Golden Ratio

Non-negative Matrix Factorizations

2018

Upgrading Slums Using Topology

Getting in Sync

Neural Nets and How They Learn

2017

How to Differentiate with a Computer

Untangling Your Square Dance

Patterns in Permutations

2016

Finding Holes in the Data

Game. SET. Polynomial.

Knot Quandaries Quelled by Quandles

2015

Petals, Flowers and Circle Packings

Game. SET. Line.

The Stable Marriage Problem and School Choice

2014

How to Grow and Prune a Classification Tree

Congressional Redistricting and Gerrymandering

How to Make a 3D Print

2013

Fedorov's Five Parallelohedra

The Frobenius Problem: How I bought Chicken McNuggets with exact change

Using Projective Geometry to Correct a Camera

2012

Who's Number 1? Hodge Theory Will Tell Us

It's a Small World After All

A (Very Short) Detour for the Traveling Salesman

2011

Arrangements and Duality or How I Learned to Slice a Ham and Cheese Sandwich

The Shadow Knows: How to measure time with a sundial

Aligning Sequence Reads to Solve the Genome Puzzle

2010

How many times do I need to shuffle this deck

Multiplication is easier when it's complex

Moving Remy in harmony: Pixar's use of harmonic functions

2009

Puzzling over Exact Cover Problems

We Recommend a Singular Value Decomposition

No Static at All: Frequency modulation and music synthesis

2008

Trees, Teeth, and Time: The mathematics of clock making

Percolation: Slipping through the cracks

Random Numbers: Nothing left to chance

2007

Pulling digits out of Pi

Image Compression: Seeing What's Not There

That knotty DNA

2006

How Google Finds Your Needle in the Web's Haystack

Voronoi Diagrams and a Day at the Beach

When kissing involves trigonometry

2005

Penrose tilings tied up in ribbons

Penrose tiles talk across miles

The center of population of the United States