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arxiv: 1305.5924 · v3 · pith:GY7M6V5Fnew · submitted 2013-05-25 · 🧮 math.CV

The L²-cohomology of a bounded smooth Stein Domain is not necessarily Hausdorff

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keywords domaincohomologydolbeaultsteinboundedcomplexformshausdorff
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We give an example of a pseudoconvex domain in a complex manifold whose $L^2$-Dolbeault cohomology is non-Hausdorff, yet the domain is Stein. The domain is a smoothly bounded Levi-flat domain in a two complex-dimensional compact complex manifold. The domain is biholomorphic to a product domain in $\mathbb{C}^2$, hence Stein. This implies that for $q>0$, the usual Dolbeault cohomology with respect to smooth forms vanishes in degree $(p,q)$. But the $L^2$-Cauchy-Riemann operator on the domain does not have closed range on $(2,1)$-forms and consequently its $L^2$-Dolbeault cohomology is not Hausdorff.

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