This is documentation for Mathematica 7, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica's uniform representation of vectors and matrices as lists automatically extends to tensors of any rank, allowing Mathematica's powerful list manipulation functions immediately to be applied to tensors, both numerical and symbolic.
Table construct a tensor of any rank from an expression
Array construct a tensor from a function: Array[f, dims]
SparseArray specify a tensor in a sparse positionLongRightArrowvalue form
Dimensions the dimensions of a tensor
ArrayDepth the rank of a tensor
ArrayQ test whether an object is a tensor of a given rank
MatrixForm display a tensor of any rank
KroneckerDelta identity tensor
LeviCivitaTensor totally antisymmetric tensor
Band specify banded structure in a sparse array
Transpose transpose to rearrange indices in any way
Dot (.) dot product
Inner generalized inner product
Outer generalized outer product
Tr generalized trace
Flatten flatten out any sequence of levels
ArrayFlatten  ▪ Partition  ▪ PadLeft  ▪ PadRight