Tuesday, November 22, 2011

Tautochrone Curve

A tautochrone (or Isochrone) is a curve for which all frictionless bodies, sliding under uniform gravity, will reach the bottom at the same time regardless of starting position. Wikipedia

Sunday, November 6, 2011

Arrow's Paradox

Arrow's Paradox says there is no 'good' voting system. There is an excellent writeup on it here.