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## #1 2012-12-16 02:54:25

Fistfiz
Member
Registered: 2012-07-20
Posts: 33

### tau=2*pi

http://tauday.com/tau-manifesto

To be brief, the "tauists", as they call themselves, argue that the constant pi should be replaced with tau=2*pi, which is much more natural.

I have to say that, to me, the manifesto was really convincing; as i see it, the use of tau instead of pi brings clarity and coherence with other formulas (for example area of a circular sector).

What do you think about it?

30+2=28 (Mom's identity)

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## #2 2012-12-16 03:00:14

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: tau=2*pi

I think it would devastate people who have already memorized thousands of pi's digits... On the other hand, mayve those people deserve such devastation...

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #3 2012-12-16 10:58:03

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: tau=2*pi

Hi;

I think it is a great idea. But I do not think anyone is going to go for a change.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #4 2012-12-18 13:00:55

Mathegocart
Member
Registered: 2012-04-29
Posts: 1,867

### Re: tau=2*pi

Fistfiz wrote:

http://tauday.com/tau-manifesto

To be brief, the "tauists", as they call themselves, argue that the constant pi should be replaced with tau=2*pi, which is much more natural.

I have to say that, to me, the manifesto was really convincing; as i see it, the use of tau instead of pi brings clarity and coherence with other formulas (for example area of a circular sector).

What do you think about it?

The integral of hope is reality.

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## #5 2012-12-18 13:29:18

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: tau=2*pi

There's no reason to get so upset...

Actually, the idea is several years old, at least 3 or 4 if not long. And it is not a bad idea, because some formulas to become just a little bit prettier, but in my opinion, it is not very useful...

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #6 2012-12-18 13:41:32

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: tau=2*pi

The guys who have memorized thousands of digits can now learn how to multiply thousands of digits.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #7 2013-01-22 02:09:28

n872yt3r
Member
Registered: 2013-01-21
Posts: 392

### Re: tau=2*pi

I memorized this much of Pi: 3.141592653589796264883. I envy that... Chinese guy!

- n872yt3r
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!

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## #8 2013-01-22 10:20:26

noelevans
Member
Registered: 2012-07-20
Posts: 236

### Re: tau=2*pi

Wasn't there a guy that bc (before computers) calculated pi out to 700 places by hand.  Then ac (after
computers) it was discovered that he made a mistake in the 200th digit and all the rest was trash
since each digit depended on the previous digit.  Probably spent the great bulk of his 15 year project
on the last 500 digits.  Mercy me!  But 200 digits of pi ain't bad, eh?

Writing "pretty" math (two dimensional) is easier to read and grasp than LaTex (one dimensional).
LaTex is like painting on many strips of paper and then stacking them to see what picture they make.

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## #9 2013-01-22 10:51:34

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: tau=2*pi

Actually, his score was 527 out of 707 digits correct! That is a great accomplishment!

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #10 2013-01-22 11:17:34

MathsIsFun
Registered: 2005-01-21
Posts: 7,651

### Re: tau=2*pi

Perhaps tau would have been a better choice, but there are also arguments supporting pi. Area = pi r^2 for example. And some stats formulas have plain old pi in them.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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## #11 2013-01-22 11:19:55

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: tau=2*pi

I think their strongest argument are the radians. A tau radians is one full turn, half a tau radians is half a turn, and so on... On all other accounts they are either the same or pi is better.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #12 2013-01-22 11:25:50

MathsIsFun
Registered: 2005-01-21
Posts: 7,651

### Re: tau=2*pi

Maybe we could come up with an argument for pi/2. It is a "right" angle, so it must be right!

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

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## #13 2013-01-22 11:40:06

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: tau=2*pi

There would certainly be some arguments for it, but also arguments against it. For now, I dont think there is any reason for switching from pi...

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #14 2013-01-22 13:05:01

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: tau=2*pi

Hi;

Shanks it seems was doing all that calculating for same reason we do it today. He wanted to know if there is some pattern in the digits of pi.

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #15 2013-01-22 23:52:10

n872yt3r
Member
Registered: 2013-01-21
Posts: 392

### Re: tau=2*pi

I agree with you, mathgogocart.
The ANCIENT GREEKS INVENTED IT IN THE ERA OF BC!

- n872yt3r
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!

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## #16 2013-01-23 02:10:06

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: tau=2*pi

They didn't invent it. They gave it a name.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #17 2013-01-23 11:50:43

n872yt3r
Member
Registered: 2013-01-21
Posts: 392

### Re: tau=2*pi

Sorry; I get so mixed up with the difference of inventions and discoveries.-

- n872yt3r
Math Is Fun Rocks!
By the power of the exponent, I square and cube you!

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## #18 2013-01-24 01:36:05

Fistfiz
Member
Registered: 2012-07-20
Posts: 33

### Re: tau=2*pi

MathsIsFun wrote:

Maybe we could come up with an argument for pi/2. It is a "right" angle, so it must be right!

30+2=28 (Mom's identity)

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