Georg Friedrich Bernhard Riemann

1. Riemann Zeta Function

The subject of the Riemann Hypothesis regarding the distribution of prime numbers.

$$ \zeta(s) = \sum_{n=1}^\infty \frac{1}{n^s} $$

2. Riemann Curvature Tensor

The central mathematical tool in General Relativity.

$$ R^\rho_{\sigma\mu\nu} = \partial_\mu \Gamma^\rho_{\nu\sigma} - \partial_\nu \Gamma^\rho_{\mu\sigma} + \Gamma^\rho_{\mu\lambda}\Gamma^\lambda_{\nu\sigma} - \Gamma^\rho_{\nu\lambda}\Gamma^\lambda_{\mu\sigma} $$