Stationary DistributionPartial Derivative is 0 Steady stateIn systems theory, a system or a process is in a steady state if the variables (called state variables) which define the behavior of the system or the process are unchanging in time. In continuous time, this means that for those properties p of the system, the partial derivative with respect to time is zero and remains so:https://en.wikipedia.org/wiki/Steady_state
