“…Now f B is not dynamically coherent, since E c is not closed under formation of Lie brackets; in fact, [E c , E c ] is spanned by Z 1 and Z 2 . Nicolas Gourmelon has recently shown that it is possible to deform f B in the case a > 0 to obtain a stably ergodic, volume-preserving, partially hyperbolic diffeomorphism that is neither dynamically coherent nor Anosov [10].…”