I have this 2x3 matrix, M:

|203|

|151|

the problem that i am having is that all the entries have bars over them. Can any one explain the bar notation. I've ever seen it before. Thanks!!!!

The problem that I'm given is to find an L:V->W such that relative to B and B', the matrix M is associated with L.

I think it would help if I knew what the bar notation ment.