- Assertion (2b) in Theorem 6.5.1 on page 183 is incorrect. It indicates that the alternating
Ricci tensor is given by =-md(phi). The multiplicative constant of -m is incorrect and should
be replaced by -m/2. Thus
correct statement is that the alternating Ricci tensor is given by -md(phi)/2. The proof given
on page 184 is correct.

- There is a sign mistake in the definition of the Nijenhuis and the para-Nijenhuis tensors given in equations (1.1.f) and
(1.1.g). In these equations [x,y] should be replaced by -[x,y]. These tensors were introduced for the sake of completeness
and played no role in the development. A similar correction should be made in the section dealing with Notational Conventions.

**To rest on the blue of the day, like an eagle rests on the wind,
over the cold range, confident on its wings and its breadth.**

Web page spun on 4 September 2012 by Peter B Gilkey 202 Deady Hall, Department of Mathematics at the University of Oregon, Eugene OR 97403-1222, U.S.A. Phone 1-541-346-4717 Email:gilkey@uoregon.edu |