Bent cigar

class gob.benchmarks.bentcigar.Bentcigar

Bases: Benchmark

The Bent cigar function.

\(f(x) = x_1^2 + 10^6 \sum_{i=2}^d x_i^2\).

Its minimum is \(0\) achieved at \(x = 0\).

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