# Files and Links

### Bookstores

Barnes &
Noble, often the best price but not always

Amazon.com, easier to find and often
the price to beat

OpAmp Books, the oldest and
best, with the best price for Gelb

### Examples and Tutorials

Gelb
Example 1-1 using vector notation, showing how much easier things are done
using vector notation as opposed to scalar equations.

Z
Transforms, a short tutorial

The Matrix Inversion Lemma, also a short tutorial in simple
matrix algebraic manipulation.

Determinants, a fairly
long write-up showing many things. The
vector triple-product is a determinant, for example.