# David Austin’s Column Archive

Here are David Austin’s older Feature Columns. David’s newest columns may be found here.

- March 2021 – Lost (and found) in space (Math and the Sciences, Math and Technology, Linear Algebra)
- October 2020 – Pooling strategies for COVID-19 testing (Math and the Sciences, Math and Nature, Probability and Statistics)
- June 2020 – Transmitting Data with Polar Codes (Math and Technology, Probability and Statistics)
- February 2020 – What’s the 411? (History of Mathematics, Math and Technology)
- December 2019 – You’re in for a shock (Calculus and Analysis, Differential Equations)
- August 2019 – Puppies, Kittens, and the Golden Ratio (Discrete Math and Combinatorics, Algebra)
- March 2019 – Non-negative Matrix Factorizations (Math and Technology, Linear Algebra)
- December 2018 – Upgrading Slums Using Topology (Geometry and Topology, Game Theory and Social Choice, Discrete Math and Combinatorics)
- August 2018 – Getting in Sync (Math and Nature, Calculus and Analysis)
- March 2018 – Neural Nets and How They Learn (Discrete Math and Combinatorics, Math and Technology)
- December 2017 – How to Differentiate with a Computer (Calculus and Analysis)
- August 2017 – Untangling Your Square Dance (Geometry and Topology, Algebra)
- March 2017 – Patterns in Permutations (Discrete Math and Combinatorics, Math and the Sciences)
- December 2016 – Finding Holes in the Data (Geometry and Topology, Math and Technology)
- August 2016 – Game. SET. Polynomial. (Discrete Math and Combinatorics, Algebra)
- March 2016 – Knot Quandaries Quelled by Quandles (Algebra, Geometry and Topology)
- December 2015 – Petals, Flowers and Circle Packings (Calculus and Analysis, Geometry and Topology)
- August 2015 – Game. SET. Line. (Discrete Math and Combinatorics, Geometry and Topology, Linear Algebra)
- March 2015 – The Stable Marriage Problem and School Choice (Game Theory and Social Choice, Discrete Math and Combinatorics)
- December 2014 – How to Grow and Prune a Classification Tree (Discrete Math and Combinatorics, Math and the Sciences)
- August 2014 – Congressional Redistricting and Gerrymandering (Game Theory and Social Choice, Geometry and Topology, Discrete Math and Combinatorics)
- March 2014 – How to Make a 3D Print (Geometry and Topology, Math and Technology)
- November 2013 – Fedorov’s Five Parallelohedra (Geometry and Topology)
- August 2013 – The Frobenius Problem: How I bought Chicken McNuggets with exact change (Calculus and Analysis, Discrete Math and Combinatorics)
- March 2013 – Using Projective Geometry to Correct a Camera (Linear Algebra, Geometry and Topology)
- December 2012 – Who’s Number 1? Hodge Theory Will Tell Us (Discrete Math and Combinatorics, Linear Algebra)
- August 2012 – It’s a Small World After All (Discrete Math and Combinatorics, Math and Technology)
- March 2012 – A (Very Short) Detour for the Traveling Salesman (Discrete Math and Combinatorics)
- December 2011 – Arrangements and Duality or How I Learned to Slice a Ham and Cheese Sandwich (Geometry and Topology, Math and Technology)
- August 2011 – The Shadow Knows: How to measure time with a sundial (Math and Nature, Math and the Sciences)
- March 2011 – Aligning Sequence Reads to Assemble the Genome Puzzle (Math and Technology, Math and the Sciences)
- December 2010 – How Many Times Do I Have to Shuffle This Deck? (Probability and Statistics)
- August 2010 – Multiplication is Easier When It’s Complex (Math and Technology, Discrete Math and Combinatorics)
- March 2010 – Moving Remy in Harmony: Pixar’s Use of Harmonic Functions (Math and Technology, Math and the Arts, Differential Equations)
- December 2009 – Puzzling Over Exact Cover Problems (Discrete Math and Combinatorics)
- August 2009 – We Recommend a Singular Value Decomposition (Linear Algebra)
- March 2009 – No Static at All: Frequency modulation and music synthesis (Math and the Arts, Math and Technology, Calculus and Analysis)
- December 2008 – “Trees, Teeth, and Time: The mathematics of clock making (Algebra, Discrete Math and Combinatorics)
- August 2008 – Percolation: Slipping through the Cracks (Probability and Statistics)
- March 2008 – Random Numbers: Nothing Left to Chance (Probability and Statistics, Algebra)
- December 2007 – Pulling Digits out of Pi (Geometry and Topology, Calculus and Analysis)
- September 2007 – Image Compression: Seeing What’s Not There (Math and Technology, Linear Algebra)
- March 2007 – That Knotty DNA (Math and the Sciences, Geometry and Topology)
- December 2006 – How Google Finds Your Needle in the Web’s Haystack (Math and Technology, Discrete Math and Combinatorics, Linear Algebra)
- August 2006 – Voronoi Diagrams and a Day at the Beach (Geometry and Topology)
- March 2006 – When Kissing Involves Trigonometry (Geometry and Topology, History of Mathematics)
- December 2005 – Penrose Tilings Tied up in Ribbons (Geometry and Topology)
- August 2005 – Penrose Tiles Talk Across Miles (Geometry and Topology)
- February 2005 – The Center of Population of the United States (Geometry and Topology)