Riemann function

Riemann function may refer to one of the several functions named after the mathematician Bernhard Riemann, including:
 * Riemann zeta function
 * Thomae's function, also called the Riemann function
 * Riemann theta function,
 * Riemann's R, an approximation of the prime-counting function π(x), see Prime-counting function.
 * Almost nowhere differentiable Riemann function, on which the Weierstrass function has been based on.