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