# Thread: pi representation

1. ## pi representation

Why there is no mathematic law in pi representation?

2. ## Re: pi representation

What do you mean by "pi representation"? I presume that your "pi" is the ratio of the circumference of a circle to its diameter (in Euclidean geometry) but what kind of representation?

3. ## Re: pi representation

Originally Posted by policer
Why there is no mathematic law in pi representation?
@policer, why not get yourself someone who can help you in your translations into English.

4. ## Re: pi representation

Perhaps he is talking about the Indiana Pi Bill of 1897.

https://en.wikipedia.org/wiki/Indiana_Pi_Bill

Maybe it did not become law because it is inaccurate? Maybe because there is no need for legislation of mathematical constants? I am not sure.

5. ## Re: pi representation

Pi is the number 3.14159... etc. etc.
(1) Why this number don't have a law that say what it the number that came after 9?
(2) The absurd is that is a can be calculate by an alogritm that say what next. Why the algorithm isn't a way to find the number pi easily?

6. ## Re: pi representation

I imagine the question really is “why is there no discernible pattern to the decimal representation of $\pi$?”.

My best answer is that the decimal representation of most numbers has no discernible pattern, notably lots of square roots. I don't think it's surprising that $\pi$ doesn't have such a pattern either.

More surprising, on the face of it, is the number of (non-decimal) representations of $\pi$ that do follow a regular pattern. However most, if not all, have derivations that relate to circles and so are not so surprising when you see that description.

8. ## Re: pi representation

Originally Posted by policer
Pi is the number 3.14159... etc. etc.
(1) Why this number don't have a law that say what it the number that came after 9?
You seem to be consistently taking your ignorance as a universal law! (I don't intend that as an insult- we are all ignorant of something.) Many people (I started to say "most" but that may be too much) know that the digit after "9" is "2". So there is a law: 'the digit after "9" is "2"' The mnemonic, "May I have a large container of coffee" helps you remember pi to 7 decimal places: There are 3, 1, 4, 1, 5, 9, and 2 letters in those words: pi is approximately 3.1415926

(2) The absurd is that is a can be calculate by an alogritm that say what next. Why the algorithm isn't a way to find the number pi easily?
Again, this is your ignorance. There is such an algorithm: https://www.cut-the-knot.org/Curricu...gotForPi.shtml

9. ## Re: pi representation

Originally Posted by policer
Why there is no mathematic law in pi representation?
As I have suggested to you in another thread, it would be easier for us to respond appropriately to your posts if you would tell us how old you are and what math courses you have taken.

10. ## Re: pi representation

Originally Posted by Walagaster
As I have suggested to you in another thread, it would be easier for us to respond appropriately to your posts if you would tell us how old you are and what math courses you have taken.
In the next few days I will be 35 years old.
I have a 4 points Bagrut. (See what is 4 Point Bagruts in google).
That all...
5 points Bagrut - in English.
4 points Bagrut - in Math.

11. ## Re: pi representation

Then you should be able to understand what I said before- it is well known that the next digit after the first "9" in the decimal expansion of pi is "2" and there is an algorithm to determine each of the succeeding digits of pi.

12. ## Re: pi representation

Originally Posted by HallsofIvy
Then you should be able to understand what I said before- it is well known that the next digit after the first "9" in the decimal expansion of pi is "2" and there is an algorithm to determine each of the succeeding digits of pi.
Policer, if your confusion is as Archie suggests, then check the link in post #7. It offers various proofs that $\pi$ is irrational (has no pattern in its decimal expansion).