The Drop-Wave function is shown as:

Drop-wave Function
The Drop-Wave function is shown as:
Dimensions: 2
The Drop-Wave function is multimodal and highly complex. The preceding plot on the right shows the function on a smaller input domain, to illustrate its characteristic features.
The function is usually evaluated on the xi ∈ [-5.12, 5.12] square, for all i = 1, 2.