Dr. Sarah's Linear Algebra Commands for Maple for Chapter 2

`> `
**restart: with(linalg):**

Warning, new definition for norm

Warning, new definition for trace

**Maple can find the inverse of a matrix**
a lot quicker than we can by hand! We did p. 77 number 10 via the Gauss-Jordan method. Now let's do it on Maple:

`> `
**A:=matrix([[1,2,2],[3,7,9],[-1,-4,-7]]):**

`> `
**B:=inverse(A);**

Check your notes to see that this is the same answer that we got in class via the Gauss-Jordan method of finding an inverse.

**To find the product of two matrices**
(for Maple 6 users, all of these commands are different!), first we define the matrices, and then use Maple's commands to multiply.

Let's check that A and B from above are really inverses of each other:

`> `
**evalm(A&*B); evalm(B&*A);**

So, they are inverses.