We study the maps induced on link Floer homology by elementary decorated link cobordisms. We compute these for births, deaths, stabilizations, and destabilizations, and show that saddle cobordisms can be computed in terms of maps in a decorated skein exact triangle that extends the oriented skein exact triangle in knot Floer homology. In particular, we completely determine the Alexander and Maslov grading shifts.
As a corollary, we compute the maps induced by elementary cobordisms between unlinks. We show that these give rise to a $(1+1)$-dimensional TQFT that coincides with the reduced Khovanov TQFT. Hence, when applied to the cube of resolutions of a marked link diagram, it gives the complex defining the reduced Khovanov homology of the knot. Finally, we define a spectral sequence from (reduced) Khovanov homology using these cobordism maps, and we prove that it is an invariant of the (marked) link.
We consider colored operads and their actions on categories. As a special example we construct a cobordism category with a colored operad action arising from oriented planar arc diagrams. This is used to construct an invariant of oriented tangle diagrams with values in the homotopy category attached to the cobordism category. Motivated by Bar-Natan's categorification of the Jones polynomial, it categorifies the quantum $sl_n$ quantum invariants and is adapted to the categorification of the $sl_n$ quantum invariants by Khovanov and Rozansky using matrix factorizations. We conjecture to exist th…
For a connected cobordism S between two knots K1,K2 in S3, we establish an inequality involving the number of local maxima, the genus of S, and the torsion orders of Kht(K1),Kht(K2), where Kht denotes Lee's perturbation of Khovanov homology. This shows that the torsion order gives a lower bound for the band-unlinking number.
We construct maps on hat Heegaard Floer homology for cobordisms decorated with graphs. The graph TQFT allows for cobordisms with disconnected ends. Our construction uses Juhász's sutured Floer TQFT. We compute the maps for several elementary graph cobordisms. As an application, we compute the action of the fundamental group on hat Heegaard Floer homology.
Annular Khovanov-Lee homology, braids, and cobordisms
证明了在增厚环A x I中的定向链环L的Khovanov-Lee复形具有双滤复形的结构，其滤链同伦型是L在A x I中的合痕类的不变量.使用的想法Ozsvath-Stipsicz-Szabo重新解释利文斯顿，我们使用这种结构来定义一个家庭的环形拉斯穆森不变量，产生信息的环形和非环形配边。针对环状链环作为辫闭包的特殊情况，利用环状Rasmussen不变量的性质得到了辫拟正性的一个必要条件和右转向性的一个充分条件.
In this paper, we study the (in)sensitivity of the Khovanov functor to four-dimensional linking of surfaces. We prove that if $L$ and $L'$ are split links, and $C$ is a cobordism between $L$ and $L'$ that is the union of disjoint (but possibly linked) cobordisms between the components of $L$ and the components of $L'$, then the map on Khovanov homology induced by $C$ is completely determined by the maps induced by the individual components of $C$ and does not detect the linking between the components. As a corollary, we prove that a strongly homotopy-ribbon concordance (i.e., a concordance who…
We show that the cobordism maps on Khovanov homology can distinguish smooth surfaces in the 4-ball that are exotically knotted (i.e., isotopic through ambient homeomorphisms but not ambient diffeomorphisms). We develop new techniques for distinguishing cobordism maps on Khovanov homology, drawing on knot symmetries and braid factorizations. We also show that Plamenevskaya's transverse invariant in Khovanov homology is preserved by maps induced by positive ascending cobordisms.
We combinatorially describe the $2$-category of singular cobordisms, called (rank one) foams, which governs the functorial version of Khovanov homology. As an application we topologically realize the type $\mathrm{D}$ arc algebra using this singular cobordism construction.
On Khovanov's cobordism theory for su(3) knot homology
本文重新考虑了Khovanov在Math.QA/0304375中定义的su（3）链同调论，以及Mackaay和Vaz在Math.GT/0603307中推广的su（3）链同调论.稍加修改后，我们将该理论描述为从缠结的平面代数到“有缝协边”（实际上是“cobordisms with seams”）（复合体）的平面代数（实际上是一个“canopolis”）的映射，使其在Bar-Natan的局部su（2）数学理论的意义上成为局部的。GT/0410495。我们表明，这种“有缝协边主义canopolis”decegorifies给正是你希望和期望：Kuperberg的su（3）蜘蛛在q-alg/9712003中定义。我们猜想一个答案，一个更有趣的问题，我们的配边理论的Karoubi信封的decategorification。最后，我们描述了如何理论实际上是完全可计算的，并给出了（2，n）环面结的su（3）同调的详细计算。
In this paper, we discuss degree 0 crossing change on Khovanov homology in terms of cobordisms. Namely, using Bar-Natan's formalism of Khovanov homology, we introduce a sum of cobordisms that yields a morphism on complexes of two diagrams of crossing change, which we call the "genus-one morphism." It is proved that the morphism is invariant under the moves of double points in tangle diagrams. As a consequence, in the spirit of Vassiliev theory, taking iterated mapping cones, we obtain an invariant for singular tangles that extending sl(2) tangle homology; examples include Lee homology, Bar-Nat…
Khovanov Homology, Lee Homology and a Rasmussen Invariant for Virtual Knots
本文包含了一个基本上自足的治疗Khovanov同调，Khovanov-Lee同调以及Rasmussen不变量的虚拟结和虚拟结配边，直接适用于经典的结和经典的结配边。要做到这一点，我们给出了一个替代配方的Manturov定义的Khovanov同调的虚拟结和链接与任意系数。这种方法使用纽结图上的切割轨迹来诱导Frobenius代数中的共轭算子。然后，我们讨论的影响，在上述理论的通用Frobenius代数的虚拟节点诱导的地图。接下来，我们将展示如何应用Karoubi包络的方法Bar-Natan和莫里森抽象的链接图与横截构建规范的Khovanov-李同源发电机。使用这些典型的发电机，我们推导出一个推广的Rasmussen不变量的虚拟结配边，并进一步推广Rasmussen的结果切片属正结的情况下，积极的虚拟结。还应该注意的是，这种推广的拉斯穆森不变量提供了一个很容易计算的障碍，在$S_g \times I \times I$的纽结配边在Turaev的意义。
We formulate a family of spin Topological Quantum Filed Theories (spin-TQFTs) as fermionic generalization of bosonic Dijkgraaf-Witten TQFTs. They are obtained by gauging $G$-equivariant invertible spin-TQFTs, or, in physics language, gauging the interacting fermionic Symmetry Protected Topological states (SPTs) with a finite group $G$ symmetry. We use the fact that the latter are classified by Pontryagin duals to spin-bordism groups of the classifying space $BG$. We also consider unoriented analogues, that is $G$-equivariant invertible pin$^\pm$-TQFTs (fermionic time-reversal-SPTs) and their g…
This paper is an introduction to Khovanov homology, starting with the Kauffman bracket state summation, emphasizing the Bar-Natan Canopoloy and tangle cobordism approach. The paper discusses a simplicial approach to Khovanov homology and a quantum model for it so that the graded Euler characteristic that produces the Jones polynomial from Khovanov homology becomes the trace of a unitary transformation on a Hilbert space associated with the Khovanov Homology.
