I'm teaching myself matrices because it could prove useful in the future.
I'll just run through a few things I've done to check if I'm correct:
i'm confident in adding/subtracting and multiplying.
What I'm having trouble getting my mind around is identities, inverses and determinants for 2x2 matrices.
In my book it says that for matrices of a given dimension (2x2) a identity I exists...
What does this I mean?
Then after this it says
I have no idea in the world what this means. Could someone clarify it for me please =]
Thanks in advanced!