Monthly Archives: January 2015

While anarchists have historically largely denied the importance of symbols to political movement, anarchists have embraced certain symbols for their cause, including most prominently the circle-A and the black flag. Since the revival of anarchism at the turn of the 21st-century concurrent with the rise … Continue reading →

In geometry, an epicycloid is a plane curve produced by tracing the path of a chosen point of a circle — called an epicycle — which rolls without slipping around a fixed circle. It is a particular kind of roulette. If the smaller circle has radius r, and the larger circle … Continue reading →