The process \(X_{t}\) is said to be wide sense stationary (WSS) if \(\begin{align}\mathbf{E}[X_{t}]&=\text{constant}\\\mathbf{E}[X_{t_{1}}X_{t_{2}}]&=\text{depends only on }|t_{1}-t_{2}|\end{align}\)
| status | not read | reprioritisations | ||
|---|---|---|---|---|
| last reprioritisation on | suggested re-reading day | |||
| started reading on | finished reading on |