Michael Farber
In this note I use cup-products and higher Massey products to find topological lower bounds on the number of geometrically distinct critical points of any closed 1-form in a given cohomology class.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
继续探索
Holomorphic linking numbers, ABC Massey products, and Calabi-Yau 3-folds
本文通过将复解析循环的 ABC 马斯奇产品与全纯链接数关联，构造出具有非消失 ABC 马斯奇产品的简单连通投影3折面族。
Bigraded notions of formality and Aeppli-Bott-Chern-Massey products
本文定义复流形微分形式代数的双分次形式性，并研究其与高阶 Aeppli–Bott–Chern–Massey 乘积的关系，证明低次乘积可非平凡拉回到沿复子流形的爆破。
We show that the existence of a nontrivial Massey product in the cohomology ring H^*(X) imposes global constraints upon the Riemannian geometry of a manifold X. Namely, we exhibit a suitable systolic inequality, associated to such a product. This generalizes an inequality proved in collaboration with Y. Rudyak, in the case when X has unit Betti numbers, and realizes the next step in M. Gromov's program for obtaining geometric inequalities associated with nontrivial Massey products. The inequality is a volume lower bound, and depends on the metric via a suitable isoperimetric quotient. The proo…
Massey products, sphere bundles and T-duality
研究迭代球丛的球面T-对偶，通过Massey积重打包Gysin序列的上同调数据，并证明在特定条件下存在反向Massey积对应的T-对偶迭代球丛。
We extend Massey products from cohomology to differential cohomology via stacks, organizing and generalizing existing constructions in Deligne cohomology. We study the properties and show how they are related to more classical Massey products in de Rham, singular, and Deligne cohomology. The setting and the algebraic machinery via stacks allow for computations and make the construction well-suited for applications. We illustrate with several examples from differential geometry and mathematical physics.
Nontrivial Massey products on compact Kähler manifolds
该研究揭示紧Kähler流形的双分次双微分代数拟同构型信息更丰富，证明低维及高维流形上存在非平凡ABC-Massey乘积，指出其在多复变同伦论意义下通常非形式。
Non-trivial ABC-Massey products on complex parallelisable solvmanifolds
本文证明非阿贝尔复单模可解李代数及相应的紧致复平行可解流形均存在非零的三重ABC-Massey积，该积是复势同伦型不变量。
Aeppli-Bott-Chern Massey products on non-Kähler solvmanifolds
本文研究了非卡拉维叶溶菌体上非平凡三重ABC-Massey积的显式计算，并证明了特定流形具有非消失的三重积且不具有近卡拉维叶度量。
In this work we analyze the behavior of Massey products of closed manifolds under the blow-up construction. The results obtained in the article are applied to the problem of constructing closed symplectic non-formal manifolds. The proofs use Thom spaces as an important technical tool. This application of Thom spaces is of conceptual interest.
In this note we show that the property of having only vanishing triple Massey products in the equivariant cohomology is inherited by the set of fixed points of hamiltonian circle actions on closed symplectic manifolds. This result can be considered in a more general context of characterizing homotopic properties of Lie group actions. In particular, it can be viewed as a partial answer to the Allday-Puppe question about finding conditions ensuring the "formality" of G-actions.
We show how to compute the spectral flow of the odd signature operator $\pm *d_{a_t}-d_{a_t}*$ along an analytic path of flat connections $a_t$ on a bundle over a closed odd-dimensional manifold in terms of Massey products in the DGLA of bundle-valued differential forms. To obtain this information, we set up a sequence of cochain complexes $\{\calg^*_n,δ_n\}$, for $n=0,1,2,\ldots$ and Hermitian forms $$Q_n:\calg_n\times\calg_n\ra \bbbC$$ whose signatures determine the spectral flow through $t=0$. The complexes and Hermitian forms are constructed using Massey products.
Let $ϕ: M\to M$ be a diffeomorphism of a $C^\infty$ compact connected manifold, and $X$ its mapping torus. There is a natural fibration $p:X\to S^1$, denote by $ξ\in H^1(X, \mathbb{Z})$ the corresponding cohomology class. Let $ρ:π_1(X)\to GL(n,\mathbb{C})$ be a representation, denote by $H^*(X,ρ)$ the corresponding twisted cohomology of $X$. Denote by $ρ_0$ the restriction of $ρ$ to $π_1(M)$, and by $ρ^*_0$ the antirepresentation conjugate to $ρ_0$. We construct from these data an automorphism of the group $H_*(M,ρ^*_0)$, that we call the twisted monodromy homomorphism $ϕ_*$. The aim of the pr…
Bott-Chern formality and Massey products on strong Kähler with torsion and Kähler solvmanifolds
研究几何 Bott-Chern 形式性与 SKT 度量及 Kähler 可解流形的关系，证明 6 维幂零流形存在 SKT 度量等价于几何 Bott-Chern 形式性，并构造非零 ABC-Massey 积。
Let X be a finite CW-complex, denote its fundamental group by G. Let R be an n-dimensional complex repesentation of G. Any element A of the first cohomology group of X with complex coefficients gives rise to the exponential deformation of the representation R, which can be considered as a curve in the space of representations. We show that the cohomology of X with local coefficients corresponding to the generic point of this curve is computable from a spectral sequence starting from the cohomology of X with R-twisted coefficients. We compute the differentials of the spectral sequence in terms …
We investigate some topological properties, in particular formality, of compact Sasakian manifolds. Answering some questions raised by Boyer and Galicki, we prove that all higher (than three) Massey products on any compact Sasakian manifold vanish. Hence, higher Massey products do obstruct Sasakian structures. Using this we produce a method of constructing simply connected K-contact non-Sasakian manifolds. On the other hand, for every $n \geq 3$, we exhibit the first examples of simply connected compact Sasakian manifolds of dimension $2n + 1$ which are non-formal. They are non-formal because …
In this paper I suggest an alternative approach (using generic flat bundles and higher Massey products) to a Lusternik-Schnirelman type theory for closed 1-forms (cf. also math.DG/9811113)
On the real homotopy type of compact complex surfaces
研究紧复曲面中Massey积的消失性质及非Kaehler情况下的基本群实Malcev完备结构。
Extending Gromov's optimal systolic inequality
本文将 Gromov 针对复射影空间的最优收缩不等式推广到基本上同调类由二维类的 cup 积构成的流形。
扫码添加微信好友，提出您的宝贵建议 👇
💡 备注请填写：网站反馈
发表机构由 AI 从论文文本抽取，如发现错误，欢迎反馈修正建议。