## 9 Vector/Matrix Functions

Many of the commands described here begin with the `v` prefix.
(For convenience, the shift-`V` prefix is equivalent to `v`.)
The commands usually apply to both plain vectors and matrices; some
apply only to matrices or only to square matrices. If the argument
has the wrong dimensions the operation is left in symbolic form.

Vectors are entered and displayed using ‘`[a,b,c]`’ notation.
Matrices are vectors of which all elements are vectors of equal length.
(Though none of the standard Calc commands use this concept, a
three-dimensional matrix or rank-3 tensor could be defined as a
vector of matrices, and so on.)