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class Minimizer(*args, **kwargs)

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Bases: Protocol

Callable Protocol for minimizer.

This interface is based on SciPy’s optimize module(opens in a new tab).

This protocol defines a callable taking the following parameters:


The objective function to minimize (for example the energy in the case of the VQE).


The initial point for the optimization.


The gradient of the objective function.


Parameters bounds for the optimization. Note that these might not be supported by all optimizers.

and which returns a minimization result object (either SciPy’s or Qiskit’s).

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