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Happy Pi day

Posted: Wed Mar 14, 2012 6:12 pm
by Phlembac Adib Hasan
Happy Pi day to everyone.Wish a loong and meaningful life to everyone.I'll ask everyone to post any wonderful fact about pi here.I'm starting by giving a self-made series of computing value of $\pi$.
\[ \pi = \frac{102857 - 4480 \sqrt{108}}{17920} - 3 \sum_{n = 2}^{\infty}
\left( \frac{\prod_{k = n}^{2 n - 1} \left( 2 k + 1 \right)}{2^{7 n - 1}
n!} \left( \frac{1}{4 n + 1} + \frac{4 n + 1}{4 \left( 4 n + 2 \right)
\left( 4 n + 3 \right)} \right) \right) \]

Re: Happy Pi day

Posted: Wed Mar 14, 2012 7:42 pm
by Moon
Haha nice! Same to you.

A wonderful fact about pi is that you can make infinitely many series like this!

Re: Happy Pi day

Posted: Wed Mar 14, 2012 10:08 pm
by Masum
Happy birthday to Einstein as well.

Re: Happy Pi day

Posted: Thu Mar 14, 2019 8:48 am
by samiul_samin
Happy $\pi$ day.
Also,This is the first day of Einstein
And The last day of Hawking.
What a connection!What does it mean?
We can get the number $1971$ very early @ $\pi$.