Parsing: a timeline, by Jeffrey Kegler.

Why Does “=” Mean Assignment?, by Hillel Wayne.

The chromatic number of the plane is at least 5, by Aubrey D.N.J. de Grey. “We present a family of finite unit-distance graphs in the plane that are not 4-colourable, thereby improving the lower bound of the Hadwiger–Nelson problem. The smallest such graph that we have so far discovered has 1567 vertices.” (more)

Exact Sampling from Determinantal Point Processes, by Philipp Hennig and Roman Garnett. “Uniform random numbers exhibit “clumping,” randomly occurring patterns responsible for the stochastic convergence rate of Monte Carlo estimators. DPPs have a self-avoiding characteristic, yielding better coverage.”

On Dividing by Two in Constructive Mathematics, by Andrew Swan.

Salsify is a new design for real-time Internet video that jointly controls a video codec and a network transport protocol. From the makers of mosh.

Xenographics, weird but (sometimes) useful charts.