Anti-self-dual differential form
= Anti-self-dual differential form
{title2=$\Omega^2_-$}
= Anti-self-dual two-form
{synonym}
On an oriented Riemannian four-manifold, a two-form $\alpha$ is anti-self-dual when $*\alpha=-\alpha$.
On an oriented Riemannian four-manifold, a <two-form> is anti-self-dual when $*\alpha=-\alpha$. Here $*$ is the <Hodge star operator>.