Mathematics – Differential Geometry
Scientific paper
2007-10-21
Mathematics
Differential Geometry
Minor typographical errors have been corrected
Scientific paper
Recently the authors showed that there is a robust potential theory attached to any calibrated manifold (X,\phi). In particular, on X there exist \phi-plurisubharmonic functions, \phi-convex domains, \phi-convex boundaries, etc., all inter-related and having a number of good properties. In this paper we show that, in a strong sense, the plurisubharmonic functions are the polar duals of the \phi-submanifolds, or more generally, the \phi-currents studied in the original paper on calibrations. In particular, we establish an analogue of Duval-Sibony Duality which characterizes points in the \phi-convex hull of a compact set K in X in terms of \phi-positive Green's currents on X and Jensen measures on K. We also characterize boundaries of \phi-currents entirely in terms of \phi-plurisubharmonic functions. Specific calibrations are used as examples throughout. Analogues of the Hodge Conjecture in calibrated geometry are considered.
Harvey Reese F.
Lawson Blaine H. Jr.
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