2008/05/12 by Gideon Maschler, Maschler, Gideon
Mathematics · #53C25 #53C55 #Differential Geometry (math.DG) #FOS: Mathematics #math.DG #msc:53C25 #msc:53C55
paper · pdf · doi:10.48550/arxiv.0805.1646
10 pages. Changes in title, abstract, revised Section 3, added Section 4.2, changed and updated references
arxiv created 2011/05/20 · arxiv updated 2011/05/24
On a 3-manifold bounding a compact 4-manifold, let a conformal structure be induced from a complete Einstein metric which conformally compactifies to a Kähler metric. Formulas are derived for the eta invariant of this conformal structure under additional assumptions. One such assumption is that the Kähler metric admits a special Kähler-Ricci potential in the sense defined by Derdzinski and Maschler. Another is that the Kähler metric is part of an ambitoric structure, in the sense defined by Apostolov, Calderbank and Gauduchon, as well as a toric one. The formulas are derived using the Duistermaat-Heckman theorem. This result is closely related to earlier work of Hitchin on the Einstein selfdual case.