Math Trek

  1. Math

    Knitting Network

    A skein of intriguing mathematical objects comes out of an evening devoted to knitting, crocheting, and other crafts.

    By Ivars Peterson
  2. Math

    A Polyhedron with a Hole

    A polyhedron with seven faces, 14 vertexes, 21 edges, and a hole makes an intriguing lamp.

    By Ivars Peterson
  3. Math

    Art of the Tetrahedron, Revisited

    A New Orleans sculptor and his tetrahedron-based artworks survived Hurricane Katrina.

    By Ivars Peterson
  4. Math

    Laying Track

    Switches in train track layouts lead to a tangled math problem.

    By Ivars Peterson
  5. Math

    The Coin in the Cake

    Hiding a coin in a cake offers a lucky slice and a tantalizing math problem.