Page 126

Location: Chapter 12, solution to Problem 11

It is (last sentence)

Hence \(C(HR)\) -- or alternatively \(R(HR)R\) -- is a warbler.

It should become

Hence \(C(H(CC))=C(HR)\) -- or alternatively \(R(HR)R\) -- is a warbler.

Short explanation

The added expression, while equivalent by virtue of \(R=CC\), is the natural one that is encountered during the derivation hence is quite helpful if made explicit.