Witten deformation for Hamiltonian loop group spaces, I
Witten deformation for Hamiltonian loop group spaces, I
复制标题
哈密顿环群空间的维滕变形,I
DOI:
--
复制
发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Yanli Song
中科院分区:
文献类型:
--
作者:
Yiannis Loizides;Yanli Song
We prove a Fredholm property for spin-c Dirac operators $mathsf{D}$ on non-compact manifolds satisfying a certain condition with respect to the action of a semi-direct product group $Kltimes Gamma$, with $K$ compact and $Gamma$ discrete. We apply this result to an example coming from the theory of Hamiltonian loop group spaces. In this context we prove that a certain index pairing $[mathcal{X}] cap [mathsf{D}]$ yields an element of the formal completion $R^{-infty}(T)$ of the representation ring of a maximal torus $T subset G$; the resulting element has an additional antisymmetry property under the action of the affine Weyl group, indicating $[mathcal{X}] cap [mathsf{D}]$ corresponds to an element of the ring of projective positive energy representations of the loop group.
影响因子:
0.7
作者:
Loizides, Yiannis;Meinrenken, Eckhard;Song, Yanli
通讯作者:
Song, Yanli