Package org.flag4j.operations.sparse.csr.complex

Class ComplexCsrMatrixMultiplication

java.lang.Object

org.flag4j.operations.sparse.csr.complex.ComplexCsrMatrixMultiplication

public final class ComplexCsrMatrixMultiplication
extends Object

This class contains low-level implementations of complex-complex sparse-sparse matrix multiplication where the sparse matrices are in CSR format.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ComplexCsrMatrixMultiplication()

Method Summary

Modifier and Type	Method	Description
static CMatrix	standard(CsrCMatrix src1, CsrCMatrix src2)	Computes the matrix multiplication between two sparse CSR matrices.
static CsrCMatrix	standardAsSparse(CsrCMatrix src1, CsrCMatrix src2)	Computes the matrix multiplication between two sparse CSR matrices and returns the result as a sparse matrix.
static CVector	standardVector(CsrCMatrix src1, CooCVector src2)	Computes the matrix-vector multiplication between a real sparse CSR matrix and a complex sparse COO vector.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ComplexCsrMatrixMultiplication

private ComplexCsrMatrixMultiplication()

Method Details

standard

public static CMatrix standard(CsrCMatrix src1,
 CsrCMatrix src2)

Computes the matrix multiplication between two sparse CSR matrices. The result is a dense matrix.

Parameters:

src1 - First CSR matrix in the multiplication.

src2 - Second CSR matrix in the multiplication.

Returns:

Entries of the dense matrix resulting from the matrix multiplication of the two sparse CSR matrices.

standardAsSparse

public static CsrCMatrix standardAsSparse(CsrCMatrix src1,
 CsrCMatrix src2)

Computes the matrix multiplication between two sparse CSR matrices and returns the result as a sparse matrix.
Warning: This method may be slower than standard(CsrCMatrix, CsrCMatrix) if the result of multiplying this matrix with src2 is not very sparse. Further, multiplying two sparse matrices (even very sparse matrices) may result in a dense matrix so this method should be used with caution.

Parameters:

src1 - First CSR matrix in the multiplication.

src2 - Second CSR matrix in the multiplication.

Returns:

Sparse CSR matrix resulting from the matrix multiplication of the two sparse CSR matrices.

standardVector

public static CVector standardVector(CsrCMatrix src1,
 CooCVector src2)

Computes the matrix-vector multiplication between a real sparse CSR matrix and a complex sparse COO vector.

Parameters:

src1 - The matrix in the multiplication.

src2 - Vector in multiplication. Treated as a column vector in COO format.

Returns:

The result of the matrix-vector multiplication.

Throws:

IllegalArgumentException - If the number of columns in src1 does not equal the number of columns in src2.