Comment by IlyaKisil

Sorry for misleading. I am aware that the term "tensor" was originally introduced within physics. But then it was adopted in chemometrics, signal processing and machine learning in a context of N-dimensional arrays of data. As such, this toolbox is focused on multi-way analysis and tensor decompositions of N-dimensional data arrays (tensors). However, fundamental operations include folding/unfolding of the data, tensor-matrix product and contration with a vector or another tensor. The latter is not implemented at the moment, but will be in future releases. Not sure whether these opertations carry the same meaning as in physics though.