qiskit.optimization.problems.QuadraticConstraint¶

class QuadraticConstraint(quadratic_program, name, linear, quadratic, sense, rhs)[source]¶

Representation of a quadratic constraint.

Constructs a quadratic constraint, consisting of a linear and a quadratic term.

Parameters

quadratic_program (Any) – The parent quadratic program.
name (str) – The name of the constraint.
linear (Union[ndarray, spmatrix, List[float], Dict[Union[int, str], float]]) – The coefficients specifying the linear part of the constraint.
quadratic (Union[ndarray, spmatrix, List[List[float]], Dict[Tuple[Union[int, str], Union[int, str]], float]]) – The coefficients specifying the linear part of the constraint.
sense (ConstraintSense) – The sense of the constraint.
rhs (float) – The right-hand-side of the constraint.

__init__(quadratic_program, name, linear, quadratic, sense, rhs)[source]¶

Constructs a quadratic constraint, consisting of a linear and a quadratic term.

Parameters

quadratic_program (Any) – The parent quadratic program.
name (str) – The name of the constraint.
linear (Union[ndarray, spmatrix, List[float], Dict[Union[int, str], float]]) – The coefficients specifying the linear part of the constraint.
quadratic (Union[ndarray, spmatrix, List[List[float]], Dict[Tuple[Union[int, str], Union[int, str]], float]]) – The coefficients specifying the linear part of the constraint.
sense (ConstraintSense) – The sense of the constraint.
rhs (float) – The right-hand-side of the constraint.

Methods

`__init__`(quadratic_program, name, linear, …)	Constructs a quadratic constraint, consisting of a linear and a quadratic term.
`evaluate`(x)	Evaluate the left-hand-side of the constraint.

Attributes

`linear`	Returns the linear expression corresponding to the left-hand-side of the constraint.
`name`	Returns the name of the constraint.
`quadratic`	Returns the quadratic expression corresponding to the left-hand-side of the constraint.
`quadratic_program`	Returns the parent QuadraticProgram.
`rhs`	Returns the right-hand-side of the constraint.
`sense`	Returns the sense of the constraint.

Sense¶: alias of qiskit.optimization.problems.constraint.ConstraintSense

evaluate(x)[source]¶

Evaluate the left-hand-side of the constraint.

Parameters: x (Union[ndarray, List, Dict[Union[int, str], float]]) – The values of the variables to be evaluated.
Return type: float
Returns: The left-hand-side of the constraint given the variable values.

property linear¶

Returns the linear expression corresponding to the left-hand-side of the constraint.

property name¶

Returns the name of the constraint.

property quadratic¶

Returns the quadratic expression corresponding to the left-hand-side of the constraint.

property quadratic_program¶

Returns the parent QuadraticProgram.

property rhs¶

Returns the right-hand-side of the constraint.

property sense¶

Returns the sense of the constraint.