Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. Extremal
Optimization (EO) is an optimization heuristic inspired by the
Bak-Sneppen model of self-organized criticality from the field of
statistical physics. This heuristic was designed initially to address
combinatorial optimization problems such as the travelling salesman
problem and spin glasses, although the technique has been demonstrated
to function in optimization domains.