I like to crochet objects involving hyperbolic surfaces and with other
mathematical aspects. This year I am interested in how two surfaces
can intersect each other and how surfaces self intersect.
One can make interesting illuminated sculptures this way.
This object was crocheted with polyester yarn around shaped
First I crocheted the central cylinder. Then I crocheted a not quite regular spiral row down along the cylinder and up in a curved line back to the starting point, thus self intersecting the downward spiral in 11 locations. There were 15 such consecutive rows. In the final rows there was a slight hyperbolic crochet to make the surface wavy.
Finally I illuminated the sculpture with battery powered fairy lights.