QuadraticProgram.quadratic_constraint

QuadraticProgram.quadratic_constraint(linear=None, quadratic=None, sense='<=', rhs=0.0, name=None)

Adds a quadratic equality constraint to the quadratic program of the form:

(x * quadratic * x + linear * x) sense rhs.

Parameters:

• linear (Union[ndarray, spmatrix, List[float], Dict[Union[int, str], float], None]) – The linear coefficients of the constraint.

• quadratic (Union[ndarray, spmatrix, List[List[float]], Dict[Tuple[Union[int, str], Union[int, str]], float], None]) – The quadratic coefficients of the constraint.

• sense (Union[str, ConstraintSense]) –

  The sense of the constraint,

  • ==, =, E, and EQ denote ‘equal to’.

  • >=, >, G, and GE denote ‘greater-than-or-equal-to’.

  • <=, <, L, and LE denote ‘less-than-or-equal-to’.

• rhs (float) – The right-hand side of the constraint.

• name (Optional[str]) – The name of the constraint. If it’s None or empty "", the default name, e.g., q0, is used.

Return type:

QuadraticConstraint

Returns:

The added constraint.

Raises:

QiskitOptimizationError – if the constraint name already exists.