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Get rid of pi? - Page 2

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micronesia
Profile Blog Joined July 2006
United States24743 Posts
July 02 2011 02:45 GMT
#21
Yeah I used tau today in an RC circuit problem so that woulda messed with me if pi/tau somehow came into the problem lol... kinda like when voltage and velocity are in the same problem (railgun problems).... my v and V is hard to distinguish with my handwriting XD
ModeratorThere are animal crackers for people and there are people crackers for animals.
Picklesicle
Profile Blog Joined September 2010
United States64 Posts
Last Edited: 2011-07-02 03:15:42
July 02 2011 02:48 GMT
#22
As has already been pointed out, the issue is not the correctness of pi (it is correct), but the elegance of tau over pi in many cases. Adding tau to our repertoire - as has, frankly, already been done; much new literature over the past couple of decades uses tau and increasingly so - does not invalidate the use of pi where it would be more elegant and if there is anything pure mathematicians get really excited about, it's elegance.

The fact that every one of us has been raised and trained with pi makes it much more natural and easy for us to use: as a general rule, humans aren't fond of changes like that; remember the outcry over Pluto (another topic for another place)? But from an educational point of view the ease with which tau works with geometry just as described in the article in the OP is, well, elegant and intuitive. I was not one of the natural mathematicians in my group; I had to slog pretty darn hard at it to get to where I am and tau would have been more intuitive for me.

Thus, in response to the question that ends the OP, I think that making tau the norm for most of the places we now use and teach pi is absolutely a good idea. In response to the topic title, though, we will never get rid of pi. It is an important and useful tool. We still use Newtonian mechanics, don't we?

Edited out an inelegant example. Sincere thanks, JeeJee. Good catch. Dumb on my part.
Mastermind
Profile Blog Joined April 2008
Canada7096 Posts
July 02 2011 02:51 GMT
#23
wtf this is just silly. What a dumb thing to make an effort to change. Some people just have to much time to think up ridiculous ideas.
xHassassin
Profile Joined November 2010
United States270 Posts
July 02 2011 02:51 GMT
#24
Why would you get rid of something well established just to get your fancy paper to look nice.

:|

IMO it just causes confusion, and god knows there's already enough mathematics incompetence in the American school system.

Overhauling something like the US measuring system in favor of metric would make sense, but something like this just seems pointless.
flamewheel
Profile Blog Joined December 2009
FREEAGLELAND26781 Posts
July 02 2011 02:52 GMT
#25
I like pi... In my opinion, kind of silly to make tau into 2pi.
Writerdamn, i was two days from retirement
Iranon
Profile Blog Joined March 2010
United States983 Posts
July 02 2011 02:52 GMT
#26
On July 02 2011 11:41 Muirhead wrote:
:X
As a mathematician, I can say "who cares?" :D


As a mathematician-in-training, I agree. It's just a number. Who cares what constants appear in equations, they're just constants... The only reason pi is neat is because it shows up in many contexts and there's a lot of history behind it. Sure, 2pi shows up in many contexts too, but so does pi/2, and so does 1/(2pi), and so does any number of things that nobody bothers to give a special name to. Who are these mathematicians who think it's "crazy" that we say 2pi for the angle 6.283... radians? Apparently not ones who have better things to do with their time, say for example, doing actual mathematics...
fuzzy_panda
Profile Blog Joined November 2010
New Zealand1681 Posts
July 02 2011 02:53 GMT
#27
On July 02 2011 11:44 GGTeMpLaR wrote:
I feel like the US should make a full switch to the metric system before we consider changing pi.


lol this is probably far more important. seriously come on united states make an effort to convert! the metric system makes total sense and won't lead you to embarrassing NASA mistakes
Dave[9]
Profile Blog Joined October 2003
United States2365 Posts
Last Edited: 2011-07-02 02:56:25
July 02 2011 02:54 GMT
#28
I saw a dude's website about tau a few months ago, imho if its only for the sake of elegance and things looking pretty, then it's kind of silly to think that we would change our comfort with the symbol to change a silly 2pi to tau. If you wanna use it in your paper and be cool and original, by all means state tau=2pi. I feel like it's trying to make tau a new style, much like how hipster mathematicians will try to use it and be like "lol I was using tau way before it got popular". It's just a little dumb to me =P

edit: I hate the name of that yahoo story "mathematicians" as if half of them are aware of this so called style sweep. At my uni I have never once seen people trying to replace tau with pi, even in the courses that use it often. I still think it's the hipster mathematicians trying to make this happen.
http://www.teamliquid.net/forum/viewmessage.php?topic_id=104154&currentpage=316#6317
theonemephisto
Profile Blog Joined May 2008
United States409 Posts
July 02 2011 02:54 GMT
#29
It's much easier to double something than to half it.

As in, I would rather write 2pi ten times than have to write tau/2 once. The less fractions the better.
Maliris
Profile Blog Joined April 2011
Northern Ireland2557 Posts
July 02 2011 02:57 GMT
#30
Can't really see this happening when the US still doesn't use the metric system
"Religion is something left over from the infancy of our intelligence, it will fade away as we adopt reason and science as our guidelines."
T0fuuu
Profile Blog Joined May 2009
Australia2275 Posts
July 02 2011 03:00 GMT
#31
What if we called it pipi ! <: that way no one is confused !
phantem
Profile Joined September 2010
United States163 Posts
July 02 2011 03:00 GMT
#32
I like pi.

In my opinion this comes out to be kinda like the metric system--the metric system may be better but in the US we're pretty stuck on the english system so changing now would cause a huge headache.

Also pi is the only pi, there are a couple of taus: torque, shear, or time constant.

My handwriting is bad enough and my subjects already use enough cross over symbols so please just keep pi pi.

"At MLG Dallas, I got up, bitchslapped hot_bid and went back to bed."-Liquid`Jinro
Bactrian
Profile Joined December 2010
Australia176 Posts
July 02 2011 03:01 GMT
#33
On July 02 2011 11:35 L3gendary wrote:
I say no, just for the sake of Euler's identity.


e^iT = 1

JeeJee
Profile Blog Joined July 2003
Canada5652 Posts
July 02 2011 03:01 GMT
#34
On July 02 2011 11:48 Picklesicle wrote:

Oh, and we'll stick we e^(pi*i). There would be an instance of pi being more elegant than tau.


e^(i*pi) = -1

vs

e^(i*tau) = 1

seems equally elegant to me
(\o/)  If you want it, you find a way. Otherwise you find excuses. No exceptions.
 /_\   aka Shinbi (requesting a name change since 27/05/09 ☺)
TrinitySC
Profile Joined December 2010
101 Posts
Last Edited: 2011-07-02 03:03:06
July 02 2011 03:02 GMT
#35
This seems relevant:

http://www.youtube.com/watch?v=jG7vhMMXagQ

The only reason to hold onto pi is from purely sentimental. First guy to reply said that the US still uses the imperial, but the fact that it's still used doesn't make it any less stupid, in my very correct opinion (vide http://en.wikipedia.org/wiki/Mars_Climate_Orbiter).

Tau just seems to be a better way to do things from a practical point of view.

Also, as stated in the video, e^(iTau)=1. better than e^(iPi)=-1, I'd say.

Edit: Ninja'd, gg Bactrian. but eh. still relevant.
WATER!
Profile Joined November 2010
United States26 Posts
July 02 2011 03:02 GMT
#36
as a math major, i like my unit circle the way it is thank you very much.
Barbiero
Profile Blog Joined September 2010
Brazil5259 Posts
July 02 2011 03:06 GMT
#37
On July 02 2011 12:01 Bactrian wrote:
Show nested quote +
On July 02 2011 11:35 L3gendary wrote:
I say no, just for the sake of Euler's identity.


e^iT = 1

http://www.youtube.com/watch?v=jG7vhMMXagQ


Damn I want that pie.

Either way, I'm in favor of the tau movement. I mean, just for the sake of convention, call tau = 2pi and that's it. Everyone uses which one they thing it is right.

The reason I'm in favor of it is radians. I HATE radians. Tau would just make them easy to understand.
♥ The world needs more hearts! ♥
KaBoom300
Profile Joined January 2011
United States225 Posts
Last Edited: 2011-07-02 03:11:50
July 02 2011 03:09 GMT
#38
I think pi is a lot more useful. while we would have to write out 2*pi*r on some occasions, area formula, etc...(pretty much anything that doesnt involve 2*pi) pi would be better. besides, the pi symbol is freakin' awesome, and it sounds like a delicious foodstuff
Liquid Dota Fighting!
yellingnewt
Profile Joined June 2011
United States22 Posts
July 02 2011 03:11 GMT
#39
why switch it. If it isn't broken don't fix it!
High Masters Protoss: :)
Clearout
Profile Blog Joined April 2010
Norway1060 Posts
July 02 2011 03:12 GMT
#40
I feel 2pi a million times is a lot better than tau/2 any time. The less fractions the better. Also tau is used for tons of other things, I don't see any of my dinosaur professors changing that anythime soon
really?
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