linalg6: STS Unavailable

linalg6 defines the following Names, but STS signatures are not currently available.

• sparseMatrixElement1
• sparseMatrixElement2
• sparseMatrixElement3
• sparseMatrixElement4
• sparseMatrixRow
• sparseMatrix
• nonZeroRowSparseMatrix
• sparseMatrix01
• nonZeroRowSparseMatrix01