Definition:Sequence of Partial Products

Definition
Let $p$ be the infinite product


 * $\displaystyle p = \prod_{n \mathop = 1}^\infty a_n$

The sequence $\left \langle {p_N} \right \rangle$ defined as:
 * $\displaystyle p_N: = \prod_{n \mathop = 1}^N a_n = a_1 \cdot a_2 \cdots a_N$

is the sequence of partial products of the infinite product $\displaystyle p = \prod_{n \mathop = 1}^\infty a_n$.