Chronological past
= Chronological past
{title2=$I^-(S)$}
The chronological past $I^-(S)$ is the set of points from which a future-directed <timelike curve> reaches $S$. Equivalently, it is the time reverse of the <chronological future>.
= Chronological past
{title2=$I^-(S)$}
The chronological past $I^-(S)$ is the set of points from which a future-directed <timelike curve> reaches $S$. Equivalently, it is the time reverse of the <chronological future>.