generate_double_sum_function: Double sum test function generator.
Description
The definition used is
Usage
generate_double_sum_function(dimensions)
Arguments
dimensions
[integer(1)] Size of parameter space.
Details
$$f(x) = \sum_{i=1}^n \left( \sum_{j=1}^{i} x_j \right)^2$$
References
H.-P. Schwefel. Evolution and Optimum Seeking.
John Wiley & Sons, New York, 1995.