Variable | 
The VariableMetricMinimizer type exposes the following members.
| Name | Description | |
|---|---|---|
| error_ | The current error. (Inherited from MinimizerBase)  | |
| iter_ | The current number of iterations performed. (Inherited from MinimizerBase)  | |
| max_ | The maximum number of iterations. (Inherited from MinimizerBase)  | |
| tolerance_ | The error tolerance. (Inherited from MinimizerBase)  |