qiskit.optimization.converters.InequalityToEquality
class InequalityToEquality(mode='auto')
Convert inequality constraints into equality constraints by introducing slack variables.
Examples
>>> from qiskit.optimization.problems import QuadraticProgram
>>> from qiskit.optimization.converters import InequalityToEquality
>>> problem = QuadraticProgram()
>>> # define a problem
>>> conv = InequalityToEquality()
>>> problem2 = conv.convert(problem)Parameters
mode (str) –
To chose the type of slack variables. There are 3 options for mode.
-
’integer’: All slack variables will be integer variables.
-
’continuous’: All slack variables will be continuous variables
-
’auto’: Try to use integer variables but if it’s not possible,
use continuous variables
__init__
__init__(mode='auto')
Parameters
mode (str) –
To chose the type of slack variables. There are 3 options for mode.
-
’integer’: All slack variables will be integer variables.
-
’continuous’: All slack variables will be continuous variables
-
’auto’: Try to use integer variables but if it’s not possible,
use continuous variables
Methods
__init__([mode]) | type modestr |
convert(problem) | Convert a problem with inequality constraints into one with only equality constraints. |
decode(result) | DEPRECATED Decode a result into another form using the information of conversion. |
encode(problem) | DEPRECATED Encode a QuadraticProgram into another form and keep the information required to decode the result. |
interpret(result) | Convert a result of a converted problem into that of the original problem. |
Attributes
mode | Returns the mode of the converter |
convert
convert(problem)
Convert a problem with inequality constraints into one with only equality constraints.
Parameters
problem (QuadraticProgram) – The problem to be solved, that may contain inequality constraints.
Return type
QuadraticProgram
Returns
The converted problem, that contain only equality constraints.
Raises
- QiskitOptimizationError – If a variable type is not supported.
- QiskitOptimizationError – If an unsupported mode is selected.
- QiskitOptimizationError – If an unsupported sense is specified.
decode
decode(result)
DEPRECATED Decode a result into another form using the information of conversion.
Return type
OptimizationResult
encode
encode(problem)
DEPRECATED Encode a QuadraticProgram into another form and keep the information required to decode the result.
Return type
QuadraticProgram
interpret
interpret(result)
Convert a result of a converted problem into that of the original problem.
Parameters
result (OptimizationResult) – The result of the converted problem or the given result in case of FAILURE.
Return type
OptimizationResult
Returns
The result of the original problem.
mode
Returns the mode of the converter
Return type
str
Returns
The mode of the converter used for additional slack variables