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arXiv 1001.2033math.SP
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有限面积开曲面上相对热迹和行列式的渐近性

Asymptotics of relative heat traces and determinants on open surfaces of finite area

Clara L. Aldana

摘要:

本文的目的是证明在具有渐近尖点端点的曲面上,拉普拉斯算子对的相对行列式是有定义的。我们考虑一个具有尖点(M,g)的曲面,其上的度量h是初始度量g的共形变换。在适当的条件下,证明了共形因子对$(Δ_{h},Δ_{g})$的相对行列式的存在性。本文的核心是证明相对热迹在小时间内的渐近展开的存在性。我们发现共形因子在无穷远的衰减,这渐近展开存在和相对行列式的定义。继B.奥斯古德河Phillips和P.Sarnak关于紧曲面上行列式极值的研究中,证明了Polyakov关于相对行列式的公式,并讨论了共形类内的极值问题。讨论了极大化者存在的必要条件。

英文摘要:

The goal of this paper is to prove that on surfaces with asymptotically cusp ends the relative determinant of pairs of Laplace operators is well defined. We consider a surface with cusps (M,g) and a metric h on the surface that is a conformal transformation of the initial metric g. We prove the existence of the relative determinant of the pair $(Δ_{h},Δ_{g})$ under suitable conditions on the conformal factor. The core of the paper is the proof of the existence of an asymptotic expansion of the relative heat trace for small times. We find the decay of the conformal factor at infinity for which this asymptotic expansion exists and the relative determinant is defined. Following the paper by B. Osgood, R. Phillips and P. Sarnak about extremal of determinants on compact surfaces, we prove Polyakov's formula for the relative determinant and discuss the extremal problem inside a conformal class. We discuss necessary conditions for the existence of a maximizer.

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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