In RPN mode, try the following eight examples:

A22 `B22`+ A22 `B22`-

A23 `B23`+ A23 `B23`-

A32 `B32`+ A32 `B32`-

A33 `B33`+ A33 `B33`-

Multiplication

There are different multiplication operations that involve matrices. These are described next. The examples are shown in algebraic mode.

Multiplication by a scalar

Some examples of multiplication of a matrix by a scalar are shown below.

Matrix-vector multiplication

Matrix-vector multiplication is possible only if the number of columns of the matrix is equal to the length of the vector. A couple of examples of matrix- vector multiplication follow:

Vector-matrix multiplication, on the other hand, is not defined. This multiplication can be performed, however, as a special case of matrix multiplication as defined next.

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