It appears that T_{A} is the linear transformation defined by:
that is: "left-multiplication by A".
So this is a problem from my Linear Algebra class, but I have no idea as to what I'm supposed to do. I don't think I've ever seen the T_{A} notation, so this problem just confuses me. Can somebody explain this problem to me? Image - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting