equations 5.0.0

An equation-solving library that also works with complex numbers and fractions.

5.0.0

• BREAKING: Removed the IntegralResults type and replaced with an equivalent record
• BREAKING: Removed the NonlinearResults type and replaced with an equivalent record
• BREAKING: Added the base modifier to Algebraic, NumericalIntegration, Interpolation, NonLinear, and SystemSolver types
• Updated Dart SDK constraints to ^3.0.0
• Updated the analysis_options.yaml file with more rules
• Added more rules from the dart_code_metrics package
• Updated the Flutter and Dart demos in the example/ folder
• Dependencies versions update

4.1.0

• Updated Dart SDK constraints to ">=2.18.0 <3.0.0"
• Improved docstring comments
• Updated the analysis_options.yaml file with more rules
• Added more rules from the dart_code_metrics package
• Updated the Flutter and Dart demos in the example/ folder
• README updates
• Dependencies versions update

4.0.0

• BREAKING: The Complex.fromPolar constructor now asks for required named parameters
• BREAKING: The Interpolation constructor now asks for required named parameters
• BREAKING: The SylvesterMatrix type now accepts an Algebraic type rather than a List<Complex>. As such, the SylvesterMatrix.fromReal constructor has been removed because a real polynomial can be built using Algebraic.fromReal instead
• BREAKING: The SystemSolver type now accepts a RealMatrix type rather than a List<List<double>>. As such, the size parameter has also been removed because the size can be retrieved from the RealMatrix object itself
• BREAKING: New names for SytemSolver parameters: changes equations to matrix and constants to knownValues
• Updated Dart SDK constraints to ">=2.17.0 <3.0.0"
• Added csc (cosecant) and sec (secant) trigonometric functions to the ExpressionParser type
• Migrated Dart code to 2.17 with super parameters
• Updated the analysis_options.yaml file with almost all rules
• Added more rules from the dart_code_metrics package
• Updated the Flutter demo in the example/ folder. Now the project can be run all platforms (mobile, web and desktop)
• Dependencies versions update

3.2.0

• Dependencies versions update
• Updated the analysis_options.yaml file with some more rules
• Updated the Flutter demo in the example/ folder
• Updated the Dart demo in the example/ folder
• Minor documentation improvements

3.1.3

• Dependencies versions update
• Updated the analysis_options.yaml file with some more rules

3.1.2

• Dependencies versions update
• Updated the README file with some fixes
• Added a new root-finding algorithm (Riddler which implements the Riddler's method)
• Updated the Flutter demo in the example/ folder

3.1.1

• Dependencies versions update
• Added more tests cases
• Updated the Flutter demo in the example/ folder

3.1.0

• BREAKING: Now NumericalIntegration requires the function via constructor (earlier it was passed to the integrate() function)
• Added the characteristicPolynomial() method on Matrix<T> to compute the characteristic polynomial of a matrix
• Fixed an issue in the eigenvalue() method
• Fixed an issue in the rank() method
• Added the eigenDecomposition() method on Matrix<T> to implement the "Eigendecomposition" algorithm
• Added the Matrix.diagonal() constructor on Matrix<T> to create diagonal matrices
• Added more lints and stricter rules in analysis_options.yaml
• Dependencies versions update

3.0.0

• BREAKING: Replaced the Laguerre type with DurandKerner (the latter is a more reliable root-finding algorithm for polynomials)
• BREAKING: Removed the integrateOn method on Nonlinear. Now numerical integration algorithms live on their own in the src/integral folder
• BREAKING: renamed firstGuess and secondGuess to a and b respectively in Secant (for consistency with other Nonlinear types)
• Created the Interpolation type to work with points interpolation
• Moved NumericalIntegration into a 'top-level' directoy inside src/
• Added the LinearInterpolation, PolynomialInterpolation, and NewtonInterpolation types
• Added eigenvalues computation on Matrix<T> with the eigenValues() method
• Added inverse matrix computation on Matrix<T> with the inverse() method
• Added cofactor matrix computation on Matrix<T> with the cofactor() method
• Added the isSymmetric() method to determine whether a matrix is symmetric or not
• Added minor computation on Matrix<T> with the minor(int row, int col) method
• Added SVD decomposition algorithm to matrix types
• Added the isDiagonal() method on Matrix<T>
• Added the isIdentity() method on Matrix<T>
• Added the trace() method on Matrix<T>
• Added the rank() method on Matrix<T>
• Bug fixes on various matrix operations
• Bug fixes in Algebraic
• Dependencies versions update

2.1.3

• Dependencies versions update
• Minor enhancement in the PolynomialLongDivision class
• Added trace computation on matrices
• Added french localization to the Flutter example app

2.1.2

• Dependencies versions update
• Updated example to Flutter 2.2.0 and improved coverage
• Added bool hasSolution() on the SystemSolver type to determine whether a system can be solved or not

2.1.1

• Added QR decomposition to the RealMatrix and ComplexMatrix type
• Dependencies versions update

2.1.0

• Changes on deep copy logic for lists (now the library uses List.from() on immutable objects)
• Added the PolynomialLongDivision class to divide a polynomial by another
• Now the Algebraic type supports opeartor/ too so you can divide polynomials to get quotient and remainder
• Dependencies versions update

2.0.3

• Dependencies versions update

2.0.2

• New extension method on String called isRealFunction that determines whether a string represents a real function or not
• New extension method on String called isNumericalExpression that determines whether a string represents numerical expression or not
• Minor changes to the ExpressionParser class
• Written more tests for the flutter_example demo project
• Dependencies versions update

2.0.1

• New toStringAsFixed() method for the Complex type
• Improved static analysis with a more elaborated analysis_options.yaml file
• Dependencies versions update

2.0.0

• Migration to stable null safety
• Dependencies versions update

2.0.0-nullsafety.5

• Updated some dependencies versions
• Added support for numerical integration with the NumericalIntegration type.
• Minor code improvements

2.0.0-nullsafety.4

• Updated some dependencies versions
• Added a new root finding algorithm (RegulaFalsi)
• Improved the computation of the determinant (now it uses LU decomposition which is way better than the old O(n!) implementation)
• Minor documentation improvements

2.0.0-nullsafety.3

• Added support for linear systems solving using Jacobi, Gauss-Seidel and SOR
• Improved comparison logic for all the classes of the package
• Added the new toStringAugmented() method for systems which prints the augmented matrix
• Written more tests for coverage
• Expanded the README.md file
• New examples in the example/ folder

2.0.0-nullsafety.2

• Created the RealMatrix and ComplexMatrix types to work with matrix
• Added support for linear systems solving using Gauss, LU decomposition and Cholesky decomposition
• Added a new static method called Algebraic.from() which automatically builds a new polynomial equation according with the number of coefficients.
• Minor documentation fixes

2.0.0-nullsafety.1

• Added a new root-finding algorithm (Brent which implements the Brent's method)
• Added Laguerre (which implements Laguerre's method for polynomials root finding)
• Minor on various Nonlinear subtypes
• Documentation fixes

2.0.0-nullsafety.0

• Package migrated to null safety (Dart 2.12).
• Added a new ExpressionParser class (which is also internally used by NonLinear)
• Minor fixes on Algebraic and NonLinear

1.0.1

• Health suggestions fixes
• Changed the description of the package

1.0.0

• Initial release
• Use Algebraic for algebraic (polynomial) equations and Nonlinear for nonlinear equations
• Easily work with complex number by using Complex