gradient_tolerance
Stopping critiera based on L2 norm of gradient
Specification
Alias: None
Arguments: REAL
Default: 1.e-4
Description
The gradient_tolerance control defines the
threshold value on the L2 norm of the objective function gradient
(for unconstrained minimum or no active constraints) or the
Lagrangian gradient (for constrained minimum) that
indicates convergence to a stationary point.
The gradient_tolerance control is currently defined
only for the OPT++ and ROL libraries.
