1. ## Quick question about matrix symbol used

What does the following mean ?

A1 ↔ A2

where a1 and a2 are 2 different matricies?

i know is used to indicate that the matrix preceding the arrow will be changed using the operation specified but i dont remember what that symbol means

2. Originally Posted by aznprdgy
What does the following mean ?

A1 ↔ A2

where a1 and a2 are 2 different matricies?

i know is used to indicate that the matrix preceding the arrow will be changed using the operation specified but i dont remember what that symbol means
I would need to see the context to be sure of what that notation means. Sometimes, it is used to indicate that the matrices commute, in other words $A_2A_1=A_1A_2$.

3. if p != i then perform A1 <=> A2
where p is the lowest interger and i is indicates the matrix row

its a step used in gaussian elimination process