Hacker News new | ask | show | jobs
by dmr_92 1201 days ago
I got sniped by this.

Normal jeans are homotopic to a cylinder with a point removed. Leg-sewn jeans are homotopic to a torus with a point removed. Both of these can be deformation retracted to a wedge of two circles (roughly: widen the puncture as far as you can).

I miss topology.