Ivars Peterson's
MathTrek

The Complexity of TipOver and Other Puzzles
February 19, 2007
Divide-and-Conquer Multiplication
February 12, 2007
Sudoku Class
February 5, 2007
Knitting Network
January 29, 2007
A Polyhedron with a Hole
January 22, 2007
Art of the Tetrahedron, Revisited
January 15, 2007
Laying Track
January 8, 2007
The Coin in the Cake
December 25, 2006
Rankings, Tournaments, and Playoffs
December 18, 2006
Travels of a Shopper
December 11, 2006
Scripting Boffo Box Office
December 4, 2006
Geometry in Court
November 27, 2006
Form Plus Function
November 20, 2006
Quark Park
November 13, 2006
Designer Decimals
November 6, 2006
Mining the Yesternet
October 30, 2006
The Great Tile Debate
October 23, 2006
Knots in Proteins
October 16, 2006
The Eclipse that Saved Columbus
October 9, 2006
Math Factor Radio
October 2, 2006
Euler's Bridges
September 25, 2006
Touring the Poles
September 18, 2006
Does Defense Win Championships?
September 11, 2006
Pancake Sorting
September 4, 2006
Making Sense of the Web's Structure
August 28, 2006
Puzzling Names in Boxes
August 21, 2006
Lake Wobegon Averages
August 14, 2006
Math Lit
August 7, 2006
Names for Numbers
July 31, 2006
Aircraft Boarding by the Numbers
July 24, 2006
Flirting with the Impossible
July 17, 2006
Bending a Soccer Ball
July 10, 2006
Magic Square Physics
July 3, 2006
Counting Franklin's Magic Squares
June 26, 2006
Folding Perfect Thirds
June 19, 2006
Dropping Lowest Scores
June 12, 2006
Fibonacci's Missing Flowers
June 5, 2006
A Straw and Two Glasses
May 29, 2006
Möbius at the Shopping Mall
May 22, 2006
Pentomino Sudoku
May 15, 2006
Quilting Pi
May 8, 2006
Constructing Difference Engines
May 1, 2006
Papercraft Polyhedra
April 23, 2006
Men, Women, Cars, and Crashes
April 17, 2006
Shadows of the Fourth Dimension
April 9, 2006
Euclid's Fourteenth Book
April 2, 2006
A Gathering for Gardner
March 27, 2006
Winning with a Winding Random Walk
March 20, 2006
From Counting to Writing
March 13, 2006
The Limits of Mathematics
March 6, 2006
The Galois Story
February 27, 2006
Calculating Dogs
February 20, 2006
A Super Bowl Lift
February 13, 2006
Predicting Oscar
February 6, 2006
Math Plus Crime, TV Style
January 30, 2006
College Friendships and Social Networks
January 23, 2006
Team Mersenne
January 16, 2006
Light Bulb Puzzles
January 9, 2006
A Cabinet of Mathematical Curiosities
December 26, 2005
The Risky Business of Spreadsheet Errors
December 19, 2005
Parking Space Roulette
December 12, 2005
Rating Researchers
December 5, 2005
Problems to Sharpen the Young
November 21, 2005
Ranking College Football Teams
November 14, 2005
Climbing a Watery Slope
November 7, 2005
Ask-a-Friend Marketplaces
October 31, 2005
Sliding Around
October 24, 2005
Chaotic Moon
October 17, 2005
Binary Dice
October 10, 2005
Numbers of No Escape
October 3, 2005
Tying Down a Random Walk
September 26, 2005
A Mathemusical Potpourri
September 19, 2005
Celestial Atomic Physics
September 12, 2005
Fermat's Natural Spirals
September 5, 2005
Primes, Palindromes, and Pyramids
August 29, 2005
Knotted Strings and Inca Accounts
August 22, 2005
Strange Orbits
August 14, 2005
Playing with Ruth-Aaron Pairs
August 7, 2005
Ticket to Cooperstown
August 1, 2005
Paper Bags and Tricky Folds
July 25, 2005
Closing the Gap on Twin Primes
July 18, 2005
Name Voyager
July 11, 2005
Air Transport Central
July 4, 2005
Magic Squares of Squares
June 27, 2005
Sudoku Math
June 20, 2005
Winning at Tennis
June 13, 2005
Knot an Interchange
June 6, 2005
Mean Median Surprise
May 30, 2005
Divisibility by Seven
May 23, 2005
Coins in a Row
May 9, 2005
Works in Progress
May 2, 2005
Classroom Birthdays
April 25, 2005
Captcha the Puzzle
April 18, 2005
Sosa's Corked Bat
April 11, 2005
Sea Shell Spirals
April 4, 2005
Fibonacci's Other Numbers
March 14, 2005
Primal Surge
March 7, 2005
Super Bowl Crashes
February 21, 2005
Knot Divided in Snow
February 7, 2005
Thirteen Spades
January 24, 2005
Going with the Crowd
January 10, 2005
Artful Routes
January 3, 2005
Sphere Worlds
December 20, 2004
Pennies in a Tray
December 13, 2004
Cruise Control and Traffic Flow
November 22, 2004
The Iced Foot Effect
November 15, 2004
Football's Overtime Bias
November 8, 2004
Squaring Circles
November 1, 2004
Young Gauss
October 25, 2004
A Catalog of Random Bits
October 18, 2004
Randomness, Risk, and Financial Markets
October 11, 2004
Proof by Computer
October 4, 2004
Euler's Sums of Powers
September 27, 2004
Sunlight Speckle
September 20, 2004
Flight of the Bumblebee
September 13, 2004
College Football, Rankings, and Wandering Monkeys
September 6, 2004
More Progressive Primes
August 30, 2004
Floating Bodies
August 23, 2004
Math Olympiad in Athens
July 26, 2004
Waring Experiments
July 19, 2004
Pythagoras Plays Ball
July 12, 2004
Dog Catching Frisbees
June 28, 2004
Earth Hole
June 21, 2004
Groups, Graphs, and Erdös Numbers
June 14, 2004
Priming Upward
June 7, 2004
Playing Pig, Optimally
May 31, 2004
A Measure of Beauty
May 24, 2004
Extra Time, Math, and the SAT
May 10, 2004
Counting on Fibonacci
May 3, 2004
Progressive Primes
April 26, 2004
Anatomy of a Bead Creature
April 19, 2004
From Number Puzzles to Automata
April 12, 2004
Riding on Square Wheels
April 5, 2004
Pinpointing Killer Asteroids
March 29, 2004
Deriving the Structure of Numbers
March 22, 2004
Mapping Scientific Frontiers
March 15, 2004
Mining the Tagged Web
March 8, 2004
Heads or Tails?
March 1, 2004
Computing on a Cellular Scale
February 23, 2004
Hunting e
February 16, 2004
Turning a Snowball Inside Out
February 9, 2004
Amicable Pairs, Divisors, and a New Record
February 2, 2004
Folding Paper in Half—Twelve Times
January 26, 2004
Extreme Tides
January 19, 2004
Splitting Terrorist Cells
January 12, 2004
Perfect Magic Cubes
January 5, 2004
MathTrek Archives