# Definition talk:Null Sequence (Homological Algebra)

I'm not sure. "Differential Complex Corresponds with a Null Sequence" to me means that given a differential complex, one can associate a null sequence. The result I had in mind was the stronger statement that given a differential complex $M$ we can associate a null sequence $\hat M$, and given a null sequence $T$ we can associate a differential complex $T^\star$. Moreover we have $(\hat M)^\star = M$.