Index

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U

U - Variable in class org.flag4j.linalg.decompositions.schur.Schur

For storing the unitary U matrix in the Schur decomposition.

U - Variable in class org.flag4j.linalg.decompositions.svd.SVD

The unitary matrix U corresponding to M=USV^H in the SVD.

unbox(Double[], double[]) - Static method in class org.flag4j.util.ArrayUtils

Converts an array of Double objects to a primitive array (i.e.

unbox(Integer[], int[]) - Static method in class org.flag4j.util.ArrayUtils

Converts an array of Integer objects to a primitive array (i.e.

unboxFlatten(Double[][]) - Static method in class org.flag4j.util.ArrayUtils

Flattens a two-dimensional array and unboxes.

uniqueSorted(int[]) - Static method in class org.flag4j.util.ArrayUtils

Gets the unique values from an array and sorts them.

UnitaryDecomposition<T,U> - Class in org.flag4j.linalg.decompositions.unitary

This class is the base class for all decompositions which proceed by using unitary transformations (specifically HouseholderOld reflectors) to bring a matrix into an upper triangular matrix (QR decomposition) or an upper Hessenburg matrix (Hessenburg decomposition).

UnitaryDecomposition(int, boolean) - Constructor for class org.flag4j.linalg.decompositions.unitary.UnitaryDecomposition

Creates a real unitary decomposer which will reduce the matrix to an upper quasi-triangular matrix (Either truly upper or upper Hessenburg).

unwrap(double[], int[]) - Method in class org.flag4j.linalg.ops.sparse.coo.CooDataSorter

Unwraps sparse data values and indices.

unwrap(double[], int[][]) - Method in class org.flag4j.linalg.ops.sparse.coo.CooDataSorter

Unwraps sparse data values and indices.

unwrap(double[], int[], int[]) - Method in class org.flag4j.linalg.ops.sparse.coo.CooDataSorter

Unwraps sparse data values and indices.

unwrap(Object[], int[]) - Method in class org.flag4j.linalg.ops.sparse.coo.CooDataSorter

Unwraps sparse data values and indices.

unwrap(Object[], int[][]) - Method in class org.flag4j.linalg.ops.sparse.coo.CooDataSorter

Unwraps sparse data values and indices.

unwrap(Object[], int[], int[]) - Method in class org.flag4j.linalg.ops.sparse.coo.CooDataSorter

Unwraps sparse data values and indices.

updateData(int) - Method in class org.flag4j.linalg.decompositions.hess.HermHess

Updates the UnitaryDecomposition.transformMatrix matrix using the computed Householder vector from ComplexUnitaryDecomposition.computeHouseholder(int).

updateData(int) - Method in class org.flag4j.linalg.decompositions.hess.SymmHess

Updates the UnitaryDecomposition.transformMatrix matrix using the computed Householder vector from RealUnitaryDecomposition.computeHouseholder(int).

updateData(int) - Method in class org.flag4j.linalg.decompositions.unitary.ComplexUnitaryDecomposition

Updates the UnitaryDecomposition.transformMatrix matrix using the computed Householder vector from ComplexUnitaryDecomposition.computeHouseholder(int).

updateData(int) - Method in class org.flag4j.linalg.decompositions.unitary.RealUnitaryDecomposition

Updates the UnitaryDecomposition.transformMatrix matrix using the computed HouseholderOld vector from RealUnitaryDecomposition.computeHouseholder(int).

updateData(int) - Method in class org.flag4j.linalg.decompositions.unitary.UnitaryDecomposition

Updates the UnitaryDecomposition.transformMatrix matrix using the computed HouseholderOld vector from UnitaryDecomposition.computeHouseholder(int).

useCentering() - Static method in class org.flag4j.io.PrintOptions

Gets the centering flag.

useConcurrent(int) - Static method in class org.flag4j.linalg.ops.dense.real_field_ops.RealFieldDenseElemDiv

Chooses if a concurrent algorithm for element-wise multiplication should be used based on the shape of the two tensors.

UTILITY_CLASS_ERR - Static variable in class org.flag4j.util.ErrorMessages

Error message for attempted instantiation of a utility class.

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