From: jzakiya@... Date: 2021-01-01T15:46:52+00:00 Subject: [ruby-core:101858] [Ruby master Feature#17496] Add constant Math::TAU Issue #17496 has been updated by jzakiya (Jabari Zakiya). To help answer this question, > IMO, the sufficient condition is that it appears in some major textbooks for school. and this, > So, I want to know how many mathematicians accept such tau. Do you know how many academic papers that uses tau as the circle constant have been published so far? I reviewed a couple of the ``TAU`` videos by Micheal Hartl, the author of ``The TAU Manifesto`` and creator of ``TAUDAY``. He provides examples of academic and educational resources where TAU is being used and formally taught. I have extracted some of that information here as examples to the answer to these questions. ``Textbook`` **College Trigonometry: With Extensive Use of the Tau Transcendental** (free downloadable version) https://studyres.com/doc/17428279/college-trigonometry-with-extensive-use-of-the-tau-transc... ``Educational videos, and learning resources`` **Kahn Academy** https://www.khanacademy.org/math/trigonometry/unit-circle-trig-func/long-live-tau/v/tau-versus-pi https://www.khanacademy.org/math/trigonometry/unit-circle-trig-func/long-live-tau/v/pi-is-still-wrong https://blog.khanacademy.org/happy-tau-day/ **Numberphile Video** https://youtu.be/83ofi_L6eAo **Papers** ``PI is Wrong`` - https://www.math.utah.edu/~palais/pi.html ``The TAU Manifesto`` - https://tauday.com/tau-manifesto You can find many more examples of ``TAU``'s use with more research|searching. It has been 11 years now since 2010 when Michael Hartl wrote the ``The TAU Manifesto`` and started ``TAUDAY``. It is gaining greater academic, educational, and scientific acceptance|use every year. It is being included into more software languages and packages every year. Hopefully, the totality of this growing body of work will establish ``TAU`` has met Matz's ``time-proven`` criteria. ---------------------------------------- Feature #17496: Add constant Math::TAU https://bugs.ruby-lang.org/issues/17496#change-89695 * Author: jzakiya (Jabari Zakiya) * Status: Rejected * Priority: Normal ---------------------------------------- Excuse me if this has been brought up before. This is a simple proposal to add the math constant ``Math::TAU`` = 2*``Math::PI``. See: https://tauday.com/ ``TAU`` has been included in a growing number of languages (Rust, Python3, Julia, et al), and this would add Ruby to that list, and make it even cooler. :-) -- https://bugs.ruby-lang.org/ Unsubscribe: