Moduli Spaces of $$G_{2}$$-Instantons and Spin(7)-Instantons on Product Manifolds

Moduli Spaces of $$G_{2}$$-Instantons and Spin(7)-Instantons on Product Manifolds
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乘积流形上 $$G_{2}$$-瞬间和自旋(7)-瞬间的模空间

DOI:
10.1007/s00023-020-00938-w
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发表时间:
2020
期刊:
Annales Henri Poincaré
影响因子:
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通讯作者:
Yuanqi Wang
Yuanqi Wang
中科院分区:
--
文献类型:
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作者:
Yuanqi Wang

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设X是一个具有半闭SU(3)-结构的6维闭流形。关于乘积流形 $$X\times S^{1}$$ 关于产品 $$G_{2}$$ - 结构和从X拉回向量丛,我们表明,任何 $$G_{2}$$ - 瞬子等价于X上通过“破规范”的厄米杨-米尔斯联络。这一结果揭示了模的拓扑类型, $$G_{2}$$ - 瞬子打开 $$X\times S^{1}$$ .在8维中,类似的结果也适用于自旋(7)瞬子的模。最后给出了一个例子。
Let X be a closed 6-dimensional manifold with a half-closed SU(3)-structure. On the product manifold $$X\times S^{1}$$ , with respect to the product $$G_{2}$$ -structure and on a pullback vector bundle from X, we show that any $$G_{2}$$ -instanton is equivalent to a Hermitian Yang–Mills connection on X via a “broken gauge”. This result reveals the topological type of the moduli of $$G_{2}$$ -instantons on $$X\times S^{1}$$ . In dimension 8, similar result holds for moduli of Spin(7)-instantons. A generalization and an example are given.