# Errata

### ************ Unfixed Typos in 4th Edition ****************

• p. 29. There is a typo in the objective function in the example. The coefficient multiplying $$\sf x_2$$ should be $$\sf +4$$ not $$\sf-4.$$ Also, after the first pivot the objective function should include a $$\sf 1.5 \varepsilon_2$$ term.

• p. 211. The sentence that reads "Hence, arc (f,c) must enter the spanning tree" should read "Hence, arc (f,b) must enter the spanning tree" .