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Linkage

Aug 31, 2015

  • The Tutte–Coxeter graph and its construction from the outer automorphisms of \( S_6 \)

  • Google's S2 spatial data structure (G+)

  • Question: how many arXiv papers are updated to their final journal versions? (Answer: about half of them have non-empty journal-reference metadata; G+)

  • Keleti's conjecture on the ratio of perimeter to area of a union of unit squares (G+)

  • Reference for mixed graph acyclicity testing? (Still not adequately answered, but the bounty has since expired)

  • Purifying spoiled randomness with spoiled randomness

  • Six-tetrahedron kaleidocycles don't work (but it takes a computer simulation to demonstrate it, because paper ones do; G+)

  • The new single-divisible-vote last-place-elimination scheme for Hugo nominations (or as they call it, e pluribus Hugo; G+)

  • Wikipedia blocked in Russia over its refusal to take down information about illegal drugs (since unblocked)

  • The two cultures of CS: theory vs experiment (G+)

  • Six points in general position in 3d can be partitioned into triples determining two linked circles

  • Boulet imagines what physicists in a pixelated world might think of it

  • Just because a formula looks mathy doesn't mean it makes any sense

  • Google teaches spammers how to break security to get their ads through

  • Hyde Al Dzhazil, Yemeni town built on a rock (G+)

  • Constructing the Golay error-correcting code from a great dodecahedron (G+)

  • David Eppstein

Geometry, graphs, algorithms, and more