Let \((a_n)\) be a sequence in a normed space . A series \(\sum_{n=0}^{\infty} a_n\) is absolute convergent if the series of the absolute values \(\lVert a_n\rVert\) converges .
Let \((a_n)\) be a sequence in a normed space . A series \(\sum_{n=0}^{\infty} a_n\) is absolute convergent if the series of the absolute values \(\lVert a_n\rVert\) converges .