Counterexamples to the pseudo-Riemannian Lichnerowicz conjecture

Abstract

The original version of the paper claimed to disprove the pseudo-Riemannian Lichnerowicz conjecture of D'Ambra and Gromov. However, the argument contains a crucial sign error in the lines following equation (8).

This paper has been withdrawn by the author due to a crucial sign error in the lines following equation (8): the dependence of the expression in question on cos t and sin t is quartic, and not quadratic as claimed