Linkage

Tiny mouse shops in Malmö (via). One of the local attractions you can look forward to visiting if you submit your algorithms papers to SWAT (submission deadline February 18).

A tip for breaking out of the filter bubble Google+ is trying to impose on you, and see all the posts from all your contacts.

Spherical cross-section of a hyperbolic buckyball honeycomb flythrough (via).

The grasshopper problem (G+, via). Strange gear-like shapes with the property that if you choose a uniformly random point within it and then jump in a random direction a unit step away, your probability of landing within the shape is maximized.

The orangutan story (G+, via). Disagreements at theory conferences seem so much more staid.

Xerox ends its life as an independent company (G+, via). The NYT article features a photo of my high-school friend Kathy Van Stone, as a young teen in the PARC Smalltalk experiment.

Beyond the OEIS: Fingerprint databases for theorems. A talk by Sara Billey.

Who’s Important? A tale from Wikipedia (G+). Kirsten Menger-Anderson writes on women in mathematics, Erdős numbers, and Wikipedia notability.

The many faces of the Petersen graph (G+). Mark-Jason Dominus finds a drawing I didn’t know, with the symmetries of a square. To deal with vertices landing on top of each other, he uses dumbell-shaped vertices that can cross each other without interacting. Also with a mini-rant about GraphViz not helping.

The geometry of the Sagrada Familia. I was inspired to find this by a recent post on a different chapel with a fractal-forest interior, but Gaudí did it earlier and better.

Why you should take chopsticks with you to art galleries and museums. Evelyn Lamb on Annalisa Crannell’s studies of geometric perspective in art.