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arXiv 2008.02591math.AGmath.RT
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长度为2的唐纳森-托马斯不变量

Donaldson-Thomas invariants of length 2 flops

Okke van Garderen

摘要:

我们开发的理论方面的精制唐纳森-托马斯理论的三倍触发器,并使用这些来确定所有DT不变量的长度为2的双无限家庭的触发收缩。我们的研究结果表明,一个精致的版本的强理性猜想的Pandharipande-Thomas在这种情况下,也精制DT不变量不分类失败。我们的主要创新是倾斜理论的应用,以更好地理解这些空间的稳定性条件和循环A-无穷大变形理论。在可能的情况下,我们在motivic设置工作,但我们也计算中介细化,如混合霍奇结构。

英文摘要:

We develop theoretical aspects of refined Donaldson-Thomas theory for threefold flops, and use these to determine all DT invariants for a doubly infinite family of length 2 flopping contractions. Our results show that a refined version of the strong-rationality conjecture of Pandharipande-Thomas holds in this setting, and also that refined DT invariants do not classify flops. Our main innovation is the application of tilting theory to better understand the stability conditions and cyclic A-infinity-deformation theory of these spaces. Where possible we work in the motivic setting, but we also compute intermediary refinements, such as mixed Hodge structures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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