New posts in Approximation

Show that $\left\vert\frac{\pi}{4} - \left(1 - \frac{1}{3} + \frac{1}{5} - \frac{1}{7} + \frac{1}{9}\right)\right\vert < 0.1$

Find the approximation of $\sqrt{80}$ with an error $\lt 0.001$

Calculating the nth super-root when n is greater than 2?

An approximate solution to a differential equation $f'(x)^2 - \omega^2 f(x)^2 = G(x)$ for small $x$

Partition of a rectangle into squares problem

Showing $\frac{1-\cos \left((n-1)\pi/n\right)}{1-\cos \left(\pi/n\right)} \approx 4n^2/\pi^2$

Famous fractions: Can any "special" numbers be approximated by simple ratios like $3.14\ldots$ as $22/7$?

Approximating $\frac {\log(5/4)}{\log(3/2)}$ to a rational number

How to approximate $49^{4}81^{5}$?

A variant of Kronecker's approximation theorem?