自旋$^c$ 6-流形的拓扑周期指数猜想
The Topological Period-Index Conjecture for spin$^c$ 6-manifolds
摘要:
拓扑周期指数猜想是一个关于空间上同调Brauer群元素的周期和指数的猜想。它被Antieau和Williams确定为函数域的周期指数猜想的拓扑类似物。本文证明了对于自旋$^c$ 6-流形,拓扑周期指数猜想是成立的,并且在一般情况下是尖锐的.我们还表明,它失败的一般6-流形。
英文摘要:
The Topological Period-Index Conjecture is an hypothesis which relates the period and index of elements of the cohomological Brauer group of a space. It was identified by Antieau and Williams as a topological analogue of the Period-Index Conjecture for function fields. In this paper we show that the Topological Period-Index Conjecture holds and is in general sharp for spin$^c$ 6-manifolds. We also show that it fails in general for 6-manifolds.
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