## Poll

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2 votes (5.12%) |

**39 members have voted**

What is bothering me is that if we round pi to five decimal places it is 3.1416. So, I submit for the consideration of the forum that we should be having our once in a century pi day blow out next year, on 3/14/16. Or am I just throwing cold water on the celebration, like those annoying perfectionists who complained whenever anybody tried to celebrate the new millennium on 1/1/2000?

The question for the poll is what is your opinion about this pi day?

pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286

Quote:WizardI'd like to wish each and every member of WoV a happy pi day. There is extra hoopla about this particular pi day because the first five digits of pi are 3.1415 and today's date is 3/14/15.

What is bothering me is that if we round pi to five decimal places it is 3.1416. So, I submit for the consideration of the forum that we should be having our once in a century pi day blow out next year, on 3/14/16. Or am I just throwing cold water on the celebration, like those annoying perfectionists who complained whenever anybody tried to celebrate the new millennium on 1/1/2000?

The question for the poll is what is your opinion about this pi day?

pi = 3.141592653589793238462643383279502884197169399375105820974944592307816406286

Or, we could celebrate in about 3 minutes, on 3/14/15 at 9:26:53 AM....

I don't understand why the celebration for something that happened 9 days, 2 months, 423 years ago...

pi=3.14159 26535 89793 23846 26433 83279 50288 41971

I actually never bothered to memorize pi past 3.14, but now I can't help but know it to 3.1415, and if we celebrate next year too, 3.14159 [edited]

celebrating down to the last second won't help me LOL

Quote:WizardThe exact moment to pop the champagne would be Mar 14, 2015, at 9:26 AM and 53 or 54 seconds, depending on rounding. If you're doing to celebrate down the second, then today is the day. You won't have another chance to celebrate pi to 10 decimal places for another 100 years. At least by the US date formatting.

pi=3.14159 26535 89793 23846 26433 83279 50288 41971

Hummmm To stay up another 2 hours to try a pi post at exactly 9:26:54

Woke up this morning and put a piece of pumpkin pie in the microwave for 33 seconds, added some Cool Whip-generic product to the top and had my coffee. I had never even heard of Pi day until 3 days ago. This is a special Pi day. 3.1415. I voted that today is the special Pi day. Sure, if you round it off it's 3.1416. But who said anything about rounding? The fifth digit is a 5. That's all you need to know.

Now, nobody has proven that Pi continues infinitely, have they?

My goal is to get a screen capture of www.time.gov at 9:26:53 AM. We are hundreds of years past the best pi day of all time, 3/14/1592 at 6:53:58 AM. The sun will supernova long before we can do better.Quote:WizardI'd like to wish each and every member of WoV a happy pi day. There is extra hoopla about this particular pi day because the first five digits of pi are 3.1415 and today's date is 3/14/15.

Quote:Greasyjohn

Now, nobody has proven that Pi continues infinitely, have they?

Proof pi is both irrational and transcendental

Quote:teliotMy goal is to get a screen capture of www.time.gov at 9:26:53 AM. We are hundreds of years past the best pi day of all time, 3/14/1592 at 6:53:58 AM. The sun will supernova long before we can do better.

We could ditch our current calendar and start over. That would be less time consuming than waiting for the supernova.

Can supernovas be predicted? Once a supernova starts, how long does it take? If our sun started supernovaing on pi day, would we live to see the next pi day?

Quote:GreasyjohnJust was reading about how Pi has been proven to be a number without end. Didn't understand it. I googled for an easy explaination and the answer was complicated.

Many significant math proofs aren't straightforward for most.

Ooops ment to hit preview first. Oh well better luck next year.

Quote:DieterNo matter how mathy you folks get, I still prefer to observe the coincidental celebration.

I prefer to observe the original date for that (at least it was the date when I first heard about it). My birthday, March 20th.

In college, the Columbia band had a cheer we would chant before every game....

"E to the x, E to the x, E to the x, dy, dx. Cosine, secant, tangent, sine, 3.14159... fight!

Quote:RSWizard.....you're trying to make a case for rounding pi? :(

Some of us have a preference for round pi....

Round pi? You filthy animal...

^{2}...."

His reply: "No! Pie are round; cornbread are square."

pi r

^{2}

He submitted that 3.14 is a worse approximation of pi than is 22/7, which rounds to 3.142857, so from now on pi day ought to be moved to July 22nd after this year (or after 2016, per the Wizard).

on none other than at 12:34AM on May 6th, '78, interrupting his Tonight Show to momentarily announce the convergence of this 1-2-3-4-5-6-7-8 "eight-card straight" astronomical event.

Pi is a weaker date-time convergence what the King of late night had done.

Quote:WizardAt least by the US date formatting.

This is my issue with calling this the "Pi day of the century." US date formatting is just plain wrong. There is an international standard, ISO 8601, that describes an unambiguous date format that is preferable to use. So yesterday was 2015-03-14.

That was my research area as well when I was a professor. Not many of us. At any rate, check out 355/113.Quote:harvson3Had dinner last night with a friend who's a number theorist.

Quote:AcesAndEightsThis is my issue with calling this the "Pi day of the century." US date formatting is just plain wrong. There is an international standard, ISO 8601, that describes an unambiguous date format that is preferable to use. So yesterday was 2015-03-14.

Both 2015-3-14 and 14-3-2015 make more sense than the way we do it. From largest to smallest or smallest to largest.

Quote:rudeboyoiQuote:AcesAndEightsThis is my issue with calling this the "Pi day of the century." US date formatting is just plain wrong. There is an international standard, ISO 8601, that describes an unambiguous date format that is preferable to use. So yesterday was 2015-03-14.

Both 2015-3-14 and 14-3-2015 make more sense than the way we do it. From largest to smallest or smallest to largest.

anyone know the actual rationale behind this MM-DD-YY format? Even when you are saying it verbally, it should have been "1st" of "MAY", "2015"

Quote:teliotcheck out 355/113.

Thank you. If you're going to celebrate pi, either December 21st (or December 20th), at 1:13.

This approximately coincides with a solstice. Coincidence? I think not.

I get it, the 355-th day out of 365 days in the calendar year. Nice.Quote:DieterThank you. If you're going to celebrate pi, either December 21st (or December 20th), at 1:13.

This approximately coincides with a solstice. Coincidence? I think not.

Quote:teliotI get it, the 355-th day out of 365 days in the calendar year. Nice.

Nice yourself. I didn't get the reference myself, but was afraid I would look stupid if I asked about it.

Quote:teliotThat was my research area as well when I was a professor. Not many of us. At any rate, check out 355/113.

One of the things he noted was that he reviews papers (for journals) from only about 4-5 other academics that he knows personally, and only they are asked to review his papers, because that's pretty much the number of people in that particular sub-subfield.

I like the new fraction.

One time I submitted a paper and the referee called me and said he had been working on the same thing and had proved the same main theorem and was writing it up. I invited him to be a co-author. I then called the editor of the journal and informed him that the reviewer called me so he wouldn't be surprised that the person was added to the paper. What can you do?Quote:harvson3One of the things he noted was that he reviews papers (for journals) from only about 4-5 other academics that he knows personally, and only they are asked to review his papers, because that's pretty much the number of people in that particular sub-subfield.

I like the new fraction.

The fractions 22/7 and 355/113 come from the convergents in the continued fraction expansion of pi. The next best fraction after 355/113 is 103993/33102. When I was teaching programming at UCSB, I used to give a programming homework assignment to figure out these convergents by brute force.

I first saw 355/113 as an approximation of pi as part of a sample problem in the instruction manual for an HP35 calculator I bought back in 1973. The sample problems were for practice in using the RPN data entry system.Quote:harvson3I like the new fraction.

The problem suggested an easy way to remember this fraction if it is written as a long division problem (hope the notation looks right to everyone). They said to just write the first three odd digits twice each and separate them with the division symbol, like:

113√355

Quote:teliotThe next best fraction after 355/113 is 103993/33102.

355/113 wins, in my opinion, since it's 7 figures of accuracy in only 6 digits, is easy to remember, and fast to key.

103993/33102 is 10 figures accuracy in 11 digits - you do better to punch in 3.1415926535.

Quote:andysifQuote:rudeboyoiQuote:AcesAndEightsThis is my issue with calling this the "Pi day of the century." US date formatting is just plain wrong. There is an international standard, ISO 8601, that describes an unambiguous date format that is preferable to use. So yesterday was 2015-03-14.

Both 2015-3-14 and 14-3-2015 make more sense than the way we do it. From largest to smallest or smallest to largest.

anyone know the actual rationale behind this MM-DD-YY format? Even when you are saying it verbally, it should have been "1st" of "MAY", "2015"

Verbally you may also say "May 1st, 2015"

May your day be full of the joy and beauty of math!