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mkatkov.wordpress.com
| | kristalcantwell.wordpress.com
2.6 parsecs away

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| | Mini-polymath 4 has started. It is based on question 3 of the IMO. The research thread is here. There is a wiki here.
| | mikespivey.wordpress.com
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| | The Riemann zeta function $latex \zeta(s)$ can be expressed as $latex \zeta(s) = \sum_{n=1}^{\infty} \frac{1}{n^s}$, for complex numbers s whose real part is greater than 1. By analytic continuation, $latex \zeta(s)$ can be extended to all complex numbers except where $latex s = 1$. The power sum $latex S_a(M)$ is given by $latex S_a(M) =...
| | dominiczypen.wordpress.com
2.8 parsecs away

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| | Let $latex \omega$ denote the first infinite cardinal - that is, the set of non-negative integers. Let $latex p_0 = 2$ be the smallest prime number, and let $latex (p_n)_{n\in\omega}$ enumerate all prime numbers in ascending order. Let $latex \mathcal{U}$ be a free ultrafilter on $latex \omega$. We consider the field $latex F = \big(\prod_{n\in\omega}\mathbb{Z}/p_n\mathbb{Z}\big)/{\mathcal...
| | educationechochamber.wordpress.com
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| Reblogged on WordPress.com