: Astronomía: stationary process

mathematical technique > probability theory > stochastic process > stationary process

mathematical technique > mathematical model > stochastic process > stationary process

stationary process

In mathematics and statistics, a stationary process (or a strict/strictly stationary process or strong/strongly stationary process) is a stochastic process whose unconditional joint probability distribution does not change when shifted in time. Consequently, parameters such as mean and variance also do not change over time. If you draw a line through the middle of a stationary process then it should be flat; it may have 'seasonal' cycles, but overall it does not trend up nor down. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Stationary_process)

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