- Dr. Alistair Ward
- Defines the parameters of a series used in a Spigot-table to generate Pi.
- Defines a series composed from a sum of terms, each one of which is the product of a coefficient and a base.
- The coefficents and bases of the series are described in Horner form;
Pi = c1 + (b1 * (c2 + b2 * (c3 + b3 * (...)))).