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Why, of course, today is pi day.

We used to celebrate this w/ pi cake while contemplating some beautiful continued fractions for pi/2 or 4/pi, or some eerie infinite series, such as Ramanujan's series for 1/pi, evoking the festive day of Nov 26, 1882 at Freiburg Mathematics Department, closely following the crunchy story of irrational and transcendental numbers, or simply stimulating our perceptions by watching Darren Aronofsky's Pi.

Today, we are stumbled upon this: The Tau Manifesto (http://tauday.com/).

As usual, Mike has cooked some anniversary material already [1,2].

[1] http://spikedmath.com/490.html.
[2] http://spikedmath.com/fact-005.html.
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