Operations with matrices

Matrices, like other mathematical objects, can be added and subtracted. They can be multiplied by a scalar, or among themselves. An important operation for linear algebra applications is the inverse of a matrix. Details of these operations are presented next.

To illustrate the operations we will create a number of matrices that we will store in the following variables. Here are the matrices A22, B22, A23, B23,

A33 and B33:

In RPN mode, the steps to follow are:

{2,2}`RANM 'A22'`K {2,3}`RANM 'A23'`K {3,2}`RANM 'A32'`K {3,3}`RANM 'A33'`K

{2,2}`RANM 'B22'`K {2,3}`RANM 'B23'`K {3,2}`RANM 'B32'`K {3,3}`RANM 'B33'`K

Addition and subtraction

Four examples are shown below using the matrices stored above (ALG mode).

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