- #1

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All of you have a happy international Pi day.

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- Thread starter interested_learner
- Start date

- #1

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All of you have a happy international Pi day.

- #2

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pi=3.13? may wanna check those calculations again =]

- #3

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It's not pi day yet..

- #4

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woohoo, pi day is finally here!! :uhh: :tongue: Can't wait til pi+0.01 day

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- #5

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woohoo, pi day is finally here!! :uhh: :tongue: Can't wait til pi+0.01 day

Another hour and a half for me..

- #6

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Lol, I feel your pain.

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- #7

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Hmmmm, [itex]\pi[/itex]

- #8

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I'd rather remember today as Einstein's birth anniversary, and wait till April 31st for pi-day.

- #9

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pi day again already? Just where has the year gone? I didn't even get my pi day shopping done.

- #10

radou

Homework Helper

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Are there *e* and *i* days, too? :tongue2:

- #11

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e-day: 27th JanuaryAre thereeandidays, too? :tongue2:

i-day: e^(i*pi/2) = 27th Jan^(i*31st April/2) = :uhh:

- #12

radou

Homework Helper

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The only problem is, how to decide if it's celebrated at 3:14 am or 3:14 pm.

- #13

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The only problem is, how to decide if it's celebrated at 3:14 am or 3:14 pm.

3.14 is taken care of by the date. So you celebrate it at 1:59:26(.5) in the morning (or in the afternoon if you don't use a 24-hour clock).

- #14

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I don't see it as a problem. We can precisely define pi's birth in this scheme, minutes second and everything, can't we ?The only problem is, how to decide if it's celebrated at 3:14 am or 3:14 pm.

I mean :

month day hour minute sec...

3 14 15 9 27

now, maybe I see your objection

why not :

month day hour minute sec...

3 1 1 9 2

or :

month day hour minute sec...

3 14 1 59 27

...

indeed, I assumed that one fills as much decimal places as possible at each step. Thus for instance I took 9 minutes, because 92 minutes exceeds 60=1h... This might be a little simplistic, or even unesthetical. But eh, why not celebrating on the first of march otherwise ?

A more esthetical solution, would be to write down everthing in a decimal basis.

- #15

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I do use a 24-hour clock, but I would have thought we need to pick up 15:9:263.14 is taken care of by the date. So you celebrate it at 1:59:26(.5) in the morning (or in the afternoon if you don't use a 24-hour clock).

this is highly debatable...

- #16

radou

Homework Helper

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Now you see it indeed is a sophisticated issue, gentlemen.

- #17

radou

Homework Helper

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- #18

Math Is Hard

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- #19

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And that's why I said that I would rather wait will April 31st. This is strictly a US-centric Pi-day.

- #20

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3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651

whew!

thats all I know off the top of my head.

- #21

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so, what is the accuracy with which you can calculate the circumference of the galaxy, supposing you know it's diameter with a precision equivalent to that of the size of the proton ?thats all I know off the top of my head.

- #22

radou

Homework Helper

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3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651

whew!

thats all I know off the top of my head.

Did you have a pi-digit-listing contest today? :tongue:

- #23

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and you can also buy pi day t-shirts for pi^2 dollars ($9.87)

- #24

radou

Homework Helper

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and you can also buy pi day t-shirts for pi^2 dollars ($9.87)

Did someone actually

- #25

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Wow, 120 digits eh?

I know:

3.141592653597932384626

22 digits...

I know:

3.141592653597932384626

22 digits...

- #26

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so, what is the accuracy with which you can calculate the circumference of the galaxy, supposing you know it's diameter with a precision equivalent to that of the size of the proton ?

I don't really know the exact measurements of the galaxy, in fact nobody on Earth does. However, the galactic disk has been estimated to have a radius of 60,000 light years. Based on this figure, I would estimate the circumference to be around 360,000 light years. Or, if you want a more accurate figure (assuming pi = 3.14), it is somewhere between 376,800 - 378,000 light years.

Did you have a pi-digit-listing contest today? :tongue:

No, unfortunately. In fact, even the math geeks in my class were unenthusiastic about it (probably because of social pressure ). But, even if we did at my school, I would have still owned them. Most people don't remember past 3.14, and most of the so-called math-wiz's in my school know only about 20 digits or so.

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- #27

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memorizing pi isn't math.

There is no more use to memorizing pi than to memorizing a random number. Although the story of the calculation of pi is very interesting.

If the math 'whiz's' spent their time memorizing pi, they wouldn't have time to become good at math.

There is no more use to memorizing pi than to memorizing a random number. Although the story of the calculation of pi is very interesting.

If the math 'whiz's' spent their time memorizing pi, they wouldn't have time to become good at math.

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- #28

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- #29

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My calculator knows pi to 10 digits, thats good enough for my uses. lol :)

I can sort of understand it, I mean, it is an important number.. But at the end of the day its probably better to memorize something that can be used. (other than to impress friends)

Definitely no more useful then memorizing any random number :P Its kind of odd that someone would think that a math student should know pi to more then 10 decimal places.

I can sort of understand it, I mean, it is an important number.. But at the end of the day its probably better to memorize something that can be used. (other than to impress friends)

Definitely no more useful then memorizing any random number :P Its kind of odd that someone would think that a math student should know pi to more then 10 decimal places.

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- #30

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Well in principle you don't have to memorize it, afteral there is a formula that gives you the value of any particular digit of [itex]\pi[/itex].My calculator knows pi to 10 digits, thats good enough for my uses. lol :)

I can sort of understand it, I mean, it is an important number.. But at the end of the day its probably better to memorize something that can be used. (other than to impress friends)

Definitely no more useful then memorizing any random number :P Its kind of odd that someone would think that a math student should know pi to more then 10 decimal places.

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