org.apache.mahout.math
Interfaces 
Matrix
Vector
Vector.Element
VectorIterable
Classes 
AbstractMatrix
AbstractVector
Algebra
CholeskyDecomposition
ConstantVector
DenseMatrix
DenseVector
DiagonalMatrix
GenericPermuting
MatrixSlice
MatrixVectorView
MatrixView
MurmurHash
MurmurHash3
NamedVector
OrthonormalityVerifier
PermutedVectorView
PivotedMatrix
QRDecomposition
RandomAccessSparseVector
RandomTrinaryMatrix
SequentialAccessSparseVector
SingularValueDecomposition
SparseColumnMatrix
SparseMatrix
SparseRowMatrix
VectorView
Exceptions 
CardinalityException
IndexException