Evolution window
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Evolution window is the narrow band of the mutation step size σ, where significant progress toward the fitness/objective function's optimum was observed in evolution strategies.
There are three well-known methods to adapt the mutation step size σ in evolution strategies:
- (1/5-th) Success Rule
- Self-Adaptation (for example through log-normal mutations)
- Cumulative Step Size Adaptation (CSA)
On simple functions all of them have been empirically shown to keep the step size within the evolution window.