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Changpeng Pan

Publications and source records attributed to Changpeng Pan.

5 recordsLinked to original sources

The Limit of the Yang-Mills-Higgs Flow for twisted Higgs pairs

In this paper, we consider the Yang-Mills-Higgs flow for twisted Higgs pairs over Kähler manifolds. We prove that this flow converges to a reflexive twisted Higgs sheaf outside a closed subset of codimension $4$, and the limiting twisted Higgs sheaf is isomorphic to the double dual of the graded twisted Higgs sheaves associated to the Harder-Narasimhan--eshadri filtration of the initial twisted Higgs bundle.

math.DG

Projectively flat bundles and semi-stable Higgs bundles

The Corlette-Donaldson-Hitchin-Simpson's correspondence states that, on a compact Kähler manifold $(X, ω)$, there is a one-to-one correspondence between the moduli space of semisimple flat complex vector bundles and the moduli space of poly-stable Higgs bundles with vanishing Chern numbers. In this paper, we extend this correspondence to the projectively flat bundles case. We prove that there is an equivalence of categories between the category of $ω$-semi-stable (poly-stable) Higgs bundles $(E, \overline{\partial}_{E}, ϕ)$ with $(2rc_{2}(E)-(r-1)c_{1}^{2}(E))\cdot [ω]^{n-2}=0 $ and the category of (semi-simple) projectively flat bundles $(E, D)$ with $\sqrt{-1}F_{D}=α\otimes \mbox{Id}_{E}$ for some real (1,1)-form $α$. Furthermore, we also establish the above correspondence on some compact non-Kähler manifolds. As its application, we obtain a vanishing theorem of characteristic classes of projectively flat bundles.

math.DG