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arXiv 1201.1933math.DG
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规范全纯映射上的Yang-Mills热流

Yang-Mills heat flow on gauged holomorphic maps

Sushmita Venugopalan

摘要:

研究了规范全纯映射空间$\mathcal{H}(P,X)$上Yang-Mills型泛函的梯度流线,其中$P$是Riemann曲面$Σ$上的主丛,$X$是Kähler Hamilton $G$ -流形.对于紧的$Σ$,可能有边界,我们证明了梯度流的长时间存在性.流线收敛于泛函的临界点。因此,在$\mathcal{H}(P,X)$上存在一个在复杂规范群作用下不变的分层。辛涡是我们研究的泛函的零点。当$Σ$有边界时,类似于Donaldson对Hermitian Yang-Mills方程的结果,我们证明了只有一个层--$\mathcal{H}(P,X)$的任何元素都可以被复规范变换为一个辛涡旋.这是Mundet的Hitchin-Kobayashi结果在有边界曲面上的一个版本。

英文摘要:

We study the gradient flow lines of a Yang-Mills-type functional on the space of gauged holomorphic maps $\mathcal{H}(P,X)$, where $P$ is a principal bundle on a Riemann surface $Σ$ and $X$ is a Kähler Hamiltonian $G$-manifold. For compact $Σ$, possibly with boundary, we prove long time existence of the gradient flow. The flow lines converge to critical points of the functional. So, there is a stratification on $\mathcal{H}(P,X)$ that is invariant under the action of the complexified gauge group. Symplectic vortices are the zeros of the functional we study. When $Σ$ has boundary, similar to Donaldson's result for the Hermitian Yang-Mills equations, we show that there is only a single stratum - any element of $\mathcal{H}(P,X)$ can be complex gauge transformed to a symplectic vortex. This is a version of Mundet's Hitchin-Kobayashi result on a surface with boundary.

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