Column

  1. Math

    Progressive Primes

    Prime numbers have all sorts of remarkable and mysterious properties. Evenly divisible only by themselves and 1, primes can’t be written as the product of smaller positive integers. There are infinitely many of them, and they appear to be scattered somewhat haphazardly among the whole numbers. It’s not yet known if there are infinitely many […]

    By Ivars Peterson
  2. Math

    Anatomy of a Bead Creature

    Beadwork offers a novel view of hyperbolic geometry.

    By Ivars Peterson
  3. Math

    From Number Puzzles to Automata

    A high school student plays with numbers and does an award-winning project elucidating the link between automata and divisibility.

    By Ivars Peterson
  4. Math

    Riding on Square Wheels

    A square wheel can roll smoothly if it travels over a roadway of the right geometric shape.