Circle actions on almost complex manifolds with isolated fixed points

The author proved that if the circle acts symplectically on a compact, connected symplectic manifold \(M\) with three fixed points, then \(M\) is equivariantly symplectomorphic to some standard action on \(\mathbb{CP}^2\). In this paper, we extend the result to a circle action on an almost complex manifold; if the circle acts on a compact, connected almost complex manifold \(M\) with exactly three fixed points, then \(\dim M=4\). Moreover, we deal with the cases of one fixed point and two fixed points.