Online Topological Crochet

November 19 to December 10
Sundays, 3:30 pm to 5:00 pm ET



Are you a topologist who’s keen to make an interesting mapping cylinder, a geometer who likes to see a beautiful surface spanning in space, a polyhedra worshipper, a knotter tyer who would love to expand your portfolio?  Maybe you are a crocheter in search of a novelty project, or a fan of Bathsheba Grossman, Charles Perry, and Brent Collins and would love to make small models of their work by yourself?  If you answered “yes” to any of those questions, or if you just want to crochet some interesting and beautiful mathematical surfaces, topological crochet is perfect for you!

Join artist Shiying Dong for an afternoon of math creativity.  With simple building blocks of chains stitches, single crochets, double crochets, and more, we will build topologically nontrivial, visually pleasing yarn sculptures.

Classes will meet on the following Sundays on Zoom, from 3:30 pm to 5:00 pm ET: November 19, November 26, December 3, and December 10.

Register for the entire series, $110


Register for single sessions, $30



For passionate participants who are newer to crochet, it is advisable to practice chain stitches prior to the workshop.

Materials required

  • Yarn in a size and color of your choice; worsted weight 4-ply wool is recommended
  • Crochet hook that matches your yarn size; for worsted weight yarn, a size 7 (4.5mm) crochet hook is recommended
  • Split ring stitch markers (or small locking stitch markers)
  • Darning needle
  • Scissors or a yarn cutter

Helpful tools (optional)

  • Blocking pins
  • Scrap yarn ball
  • A cushion or foam board


Should you have any questions, email

Each participant must register separately; class size is limited in order to allow individual attention and assistance from the instructor in this hands-on workshop.  Multiple participants may join from the same Zoom connection so long as each participant is registered.

This is an online-only event.  Occasional video recordings are made available for a fee at