Photo Name Category Primary source Date available Projects
#413 Math Blocks Shawl Scarf Schaefer Yarn 2011 18
no photo
Helicoid/Catenoid Toys Crocheting Adventures with Hyperbolic Planes March 2009 2
Pseudosphere Toys Crocheting Adventures with Hyperbolic Planes March 2009 17 50
Hyperbolic Plane Other Mathematical Intelligencer, June 2001 June 2001 233 796