Scalar: a scalar is a single number, which is different from most other objects linear algebra research.
Vector: is a number of a vector, the vector can be viewed as a point in space, the coordinates of each element is different coordinate axes.
Matrix: the matrix is a two-dimensional array in which each element is determined by two indices.
Tensor: in general, a distribution of elements in the array in a regular grid coordinates in several dimensions, we call the tensor.
Is the transposed matrix the diagonal axis of the mirror, this is from left to bottom right diagonal line is called the main diagonal.
Broadcast: Implicit copy number vector b to a position way