Instanton Floer homology and the Alexander polynomial
Instanton Floer homology and the Alexander polynomial
复制标题
Instanton Floer 同调和亚历山大多项式
DOI:
--
复制
发表时间:
2009
期刊:
影响因子:
--
通讯作者:
T. Mrowka
中科院分区:
文献类型:
--
作者:
P. Kronheimer;T. Mrowka
The instanton Floer homology of a knot in the three-sphere is a vector space with a canonical mod 2 grading. It carries a distinguished endomorphism of even degree,arising from the 2-dimensional homology class represented by a Seifert surface. The Floer homology decomposes as a direct sum of the generalized eigenspaces of this endomorphism. We show that the Euler characteristics of these generalized eigenspaces are the coefficients of the Alexander polynomial of the knot. Among other applications, we deduce that instanton homology detects fibered knots.