Asymptotics of Nahm sums at roots of unity
Asymptotics of Nahm sums at roots of unity
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DOI:
10.1007/s11139-020-00266-x
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发表时间:
2020-07-21
影响因子:
0.7
通讯作者:
Zagier, Don
中科院分区:
文献类型:
--
作者:
Garoufalidis, Stavros;Zagier, Don
We give a formula for the radial asymptotics to all orders of the special q-hypergeometric series known as Nahm sums at complex roots of unity. This result is used in Calegari et al. (Bloch groups, algebraic K-theory, units and Nahm's conjecture. arXiv:1712.04887, 2017) to prove Nahm's conjecture relating the modularity of Nahm sums to the vanishing of a certain invariant in K-theory. The power series occurring in our asymptotic formula are identical to the conjectured asymptotics of the Kashaev invariant of a knot once we convert Neumann-Zagier data into Nahm data, suggesting a deep connection between asymptotics of quantum knot invariants and asymptotics of Nahm sums that will be discussed further in a subsequent publication.