Hap-pi Tau Day. Today is, well, Tau Day.

Pi is wrong. Pi is the ratio of a diameter to the circumference of a circle. It works just fine. It’s just that the real important relationship is that of the radius to the circumference. Most mathematical equations really work off the ‘radius’ relationship which is why you so often see the term ‘2 pi’. The proponents of the Tau Manifesto argue that a new term like ‘tau’, equal to ‘half of pi’, is actually a more powerful constant to use in geometry and trigonometry….

  • “The Tau Manifesto is dedicated to one of the most important numbers in mathematics, perhaps the most important: the circle constant relating the circumference of a circle to its linear dimension. For millennia, the circle has been considered the most perfect of shapes, and the circle constant captures the geometry of the circle in a single number. Of course, the traditional choice for the circle constant is π—but, as mathematician Bob Palais notes in his delightful article “π Is Wrong!”1, π is wrong. It’s time to set things right.”

The video ‘Pi is (still) wrong’ does a delightful job of walking one through the proposition to embrace the failure of pi…with tau.

Embrace the Tau of mathematical conventional failure…