Stuad^Dib

@meowmeowmeow

1. A good way to think of matrices is as a kind of function. They take column vectors as "input” by multiplying with them, and the “output” from that product is another vector. The determinant measures how much a matrix stretches the space the input vectors come from. Big determinants stretch spaces way out, small ones shrink them way down, and negative ones reverse them like a mirror.