stationarity condition
noun phraseUK /ˌsteɪʃəˈnærəti kənˈdɪʃən/
US /ˌsteɪʃəˈnerəti kənˈdɪʃən/
A rule that says some things stay the same over time.
The stationarity condition means the pattern of the data does not change as time goes on.
OTHER MEANINGS
2. In statistics, a requirement that a time series has constant mean, variance, and autocorrelation over time.
Before fitting the model, the analyst checked the stationarity condition of the series.
3. In economics, a condition under which long-run relationships between variables remain stable.
The stationarity condition ensures the equilibrium relationship does not drift.
4. In mathematics, a property where a function or process does not change when shifted in time or space.
The stationarity condition holds for the wave pattern along the uniform string.