τ–invariants for knots in rational homology spheres
τ–invariants for knots in rational homology spheres
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DOI:
10.2140/agt.2020.20.1601
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发表时间:
2016-11
期刊:
影响因子:
--
通讯作者:
Katherine Raoux
中科院分区:
文献类型:
--
作者:
Katherine Raoux
Ozsv\'ath and Szab\'o used the knot filtration on $\widehat{CF}(S^3)$ to define the $\tau$-invariant for knots in the 3-sphere. In this article, we generalize their construction and define a collection of $\tau$-invariants associated to a knot $K$ in a rational homology sphere $Y$. We then show that some of these invariants provide lower bounds for the genus of a surface with boundary $K$ properly embedded in a negative definite 4-manifold with boundary $Y$..