Rosenbrock¶
- class gob.benchmarks.rosenbrock.Rosenbrock¶
Bases:
BenchmarkThe Rosenbrock function.
\(f(x) = \sum_{i=1}^{d-1} \left[100(x_{i+1} - x_i^2)^2 + (x_i - 1)^2 \right]\)
Its minimum is \(0\) achieved at \(x_i = 1\).
- expr(x)¶
The expression of the function.
- Parameters:
x (array-like) – The point at which to evaluate the function.
- Returns:
The value of the function at x.
- Return type:
float