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How can we prove $\pi =1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}-\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+\cdots\,$?

$\pi$ in terms of $4$?

Has anyone talked themselves into understanding Euler's identity a bit?

Do the digits of $\pi$ contain every possible finite-length digit sequence? [duplicate]

The lore of the game Numenera mentions "an irrational number that may be a four-dimensional equivalent of $\pi$". What could this mean?

Why is $\pi$ so close to $3$? [closed]

Proving $\pi^3 \gt 31$

Approximation of $e$ using $\pi$ and $\phi$?

Where do Mathematicians Get Inspiration for Pi Formulas?

Show that $\sum_{n=0}^{\infty}\frac{2^n(5n^5+5n^4+5n^3+5n^2-9n+9)}{(2n+1)(2n+2)(2n+3){2n\choose n}}=\frac{9\pi^2}{8}$

Why is $\pi$ = 3.14... instead of 6.28...?

Ramanujan's approximation for $\pi$

Why does this pattern of "nasty" integrals stop?

Bizarre Definite Integral

Trying to prove that $\sum_{j=2}^\infty \prod_{k=1}^j \frac{2 k}{j+k-1} = \pi$

Could there be an irrational number $x$ such that the product of $x$ and $\pi$ are rational?

Proof that the ratio between the logs of the product and LCM of the Fibonacci numbers converges to $\frac{\pi^2}{6}$

New posts in pi

How to prove this $\pi$ formula? [duplicate]

Peculiar locations of the root and the maximum of $(x+1)^{x+1}-x^{x+2}$

Gosper's unusual formula connecting $e$ and $\pi$

How can we prove $\pi =1+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}-\frac{1}{5}+\frac{1}{6}+\frac{1}{7}+\cdots\,$?

$\pi$ in terms of $4$?

Has anyone talked themselves into understanding Euler's identity a bit?

Do the digits of $\pi$ contain every possible finite-length digit sequence? [duplicate]

The lore of the game Numenera mentions "an irrational number that may be a four-dimensional equivalent of $\pi$". What could this mean?

Why is $\pi$ so close to $3$? [closed]

Proving $\pi^3 \gt 31$

Approximation of $e$ using $\pi$ and $\phi$?

Where do Mathematicians Get Inspiration for Pi Formulas?

Show that $\sum_{n=0}^{\infty}\frac{2^n(5n^5+5n^4+5n^3+5n^2-9n+9)}{(2n+1)(2n+2)(2n+3){2n\choose n}}=\frac{9\pi^2}{8}$

Why is $\pi$ = 3.14... instead of 6.28...?

Ramanujan's approximation for $\pi$

Why does this pattern of "nasty" integrals stop?

Bizarre Definite Integral

Trying to prove that $\sum_{j=2}^\infty \prod_{k=1}^j \frac{2 k}{j+k-1} = \pi$

Could there be an irrational number $x$ such that the product of $x$ and $\pi$ are rational?

Proof that the ratio between the logs of the product and LCM of the Fibonacci numbers converges to $\frac{\pi^2}{6}$