文摘
Let X be a compact connected strongly pseudoconvex CR manifold of real dimension \(2n-1\) in \({\mathbb {C}}^{N}\). It has been an interesting question to find an intrinsic smoothness criteria for the complex Plateau problem. For \(n\ge 3\) and \(N=n+1\), Yau found a necessary and sufficient condition for the interior regularity of the Harvey–Lawson solution to the complex Plateau problem by means of Kohn–Rossi cohomology groups on X in 1981. For \(n=2\) and \(N\ge n+1\), the first and third authors introduced a new CR invariant \(g^{(1,1)}(X)\) of X. The vanishing of this invariant will give the interior regularity of the Harvey–Lawson solution up to normalization. For \(n\ge 3\) and \(N>n+1\), the problem still remains open. In this paper, we generalize the invariant \(g^{(1,1)}(X)\) to higher dimension as \(g^{(\Lambda ^n 1)}(X)\) and show that if \(g^{(\Lambda ^n 1)}(X)=0\), then the interior has at most finite number of rational singularities. In particular, if X is Calabi–Yau of real dimension 5, then the vanishing of this invariant is equivalent to give the interior regularity up to normalization. Rong Du: The Research Sponsored by the National Natural Science Foundation of China (Grant No. 11471116), Science and Technology Commission of Shanghai Municipality (Grant No. 13dz2260400) and Shanghai Pujiang Program (Grant No. 12PJ1402400). Yun Gao: The Research Sponsored by the National Natural Science Foundation of China (Grant Nos. 11271250, 11271251) and SMC program of Shanghai Jiao Tong University. Stephen Yau: The Research supported by Tsingua Start up fund. All the authors are supported by China NSF (Grant No. 11531007).