# Definition:Convergent Product/Number Field/Arbitrary Sequence

Let $\mathbb K$ be one of the standard number fields $\Q, \R, \C$.
Let $\sequence {a_n}$ be a sequence of elements of $\mathbb K$.
The infinite product $\ds \prod_{n \mathop = 1}^\infty a_n$ is convergent if and only if:
there exists $n_0 \in \N$ such that the sequence of partial products of $\ds \prod_{n \mathop = n_0}^\infty a_n$ converges to some $b \in \mathbb K \setminus \set 0$.
The sequence of partial products of $\ds \prod_{n \mathop = 1}^\infty a_n$ is then convergent to some $a \in \mathbb K$.