mtc_ukJun 28, 2025

Happy Tau Day! (Pi is wrong.)

https://substack.michaelhartl.com/p/tau-day-2025

#tau #tauday #piiswrong

Tau Day 2025

Happy Tau Day!

Math, Physics, Tau, et alia
mtc_ukMar 14, 2023

Happy Tau/2 Day.

https://tauday.com/
#tauday
#piiswrong

No, really, pi is wrong: The Tau Manifesto

For millennia, the circle has been considered the most perfect of shapes, and the circle constant π captured the geometry of the circle in a single number. But π is wrong, and it’s time to set things right.

Tau Day
Pᵉtɘr Wᵉil8acherDec 15, 2022
I had never heard about that before but during our @AIP_Potsdam Jamboree today, someone told us about #piiswrong. Apparently there is a whole subculture preferring to use τ instead of 2π. 😮