Published online by Cambridge University Press: 19 March 2015
We consider a diffeomorphism $f$ of a compact manifold
$M$ which is almost Axiom A, i.e.
$f$ is hyperbolic in a neighborhood of some compact
$f$ -invariant set, except in some singular set of neutral points. We prove that if there exists some
$f$ -invariant set of hyperbolic points with positive unstable Lebesgue measure such that for every point in this set the stable and unstable leaves are ‘long enough’, then
$f$ admits an SRB (probability) measure.