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In this article we formulate a version of the analytic Novikov conjecture for semigroups rather than groups, and show that the descent argument from coarse geometry generalises effectively to this new situation.

K-Theory and Homology · Mathematics 2016-11-25 Paul D. Mitchener

The relative Novikov conjecture states that the relative higher signatures of manifolds with boundary are invariant under orientation-preserving homotopy equivalences of pairs. In this paper, we study the relative Baum-Connes assembly map…

Operator Algebras · Mathematics 2023-04-07 Jintao Deng , Geng Tian , Zhizhang Xie , Guoliang Yu

In this paper, we prove the Novikov conjecture for a class of highly non-linear groups, namely discrete subgroups of the diffeomorphism group of a compact smooth manifold. This removes the volume-preserving condition in a previous work.…

K-Theory and Homology · Mathematics 2025-02-24 Sherry Gong , Jianchao Wu , Zhizhang Xie , Guoliang Yu

Let $1 \to N \to G \to G/N \to 1$ be a short exact sequence of countable discrete groups and let $B$ be any $G$-$C^*$-algebra. In this paper, we show that the strong Novikov conjecture with coefficients in $B$ holds for such a group $G$…

K-Theory and Homology · Mathematics 2020-03-05 Jintao Deng

In this article, we prove a strong relative Novikov conjecture for any pair of groups that are coarsely embeddable into Hilbert space.

Functional Analysis · Mathematics 2025-10-15 Geng Tian , Zhizhang Xie , Guoliang Yu

In this paper, we prove the algebraic K-theory Novikov conjecture for group algebras over the ring of Schatten class operators. The main technical tool in the proof is an explicit construction of the Connes-Chern character.

K-Theory and Homology · Mathematics 2012-10-23 Guoliang Yu

We show that the rational Novikov conjecture for a group $\Gamma$ of finite homological type follows from the mod 2 acyclicity of the Higson compactifcation of an E$\Gamma$. We then show that for groups of finite asymptotic dimension the…

Geometric Topology · Mathematics 2007-05-23 A. Dranishnikov , S. Ferry , S. Weinberger

The first author conjectured certain relations for Morita-Mumford classes and Newton classes in the integral cohomology of mapping class groups (integral Riemann-Roch formulae). In this paper, the conjecture is verified for cyclic subgroups…

Geometric Topology · Mathematics 2007-05-23 Toshiyuki Akita , Nariya Kawazumi

We define for families of finite metric spaces quantitative assembly map estimates that take into account propagation phenomena for pseudo-differential calculus. We relate these estimates to the Novikov conjecture and we show that they fit…

K-Theory and Homology · Mathematics 2024-12-03 Hervé Oyono-Oyono , Guoliang Yu

We give a survey on recent development of the Novikov conjecture and its applications to topological rigidity and non-rigidity. .

Geometric Topology · Mathematics 2020-01-08 Guoliang Yu

We prove that any countable discrete and torsion free subgroup of a general linear group over an arbitrary field or a similar subgroup of an almost connected Lie group satisfies the integral algebraic K-theoretic (split) Novikov conjecture…

K-Theory and Homology · Mathematics 2015-08-05 Snigdhayan Mahanta

A class of multi-component integrable systems associated to Novikov algebras, which interpolate between KdV and Camassa-Holm type equations, is obtained. The construction is based on the classification of low-dimensional Novikov algebras by…

Exactly Solvable and Integrable Systems · Physics 2016-02-18 Ian A. B. Strachan , Blazej M. Szablikowski

We prove the Banach strong Novikov conjecture for groups having polynomially bounded higher-order combinatorial functions. This includes all automatic groups.

K-Theory and Homology · Mathematics 2018-04-11 Alexander Engel

We study the connection between the condition that the reduced C*-algebra of a finitely presented group is exact and the Novikov conjecture holding. The main result states that if the group is strongly exact in the sense that the inclusion…

Operator Algebras · Mathematics 2007-05-23 Erik Guentner , Jerome Kaminker

We prove that the Novikov conjecture holds for any discrete group admitting an isometric and metrically proper action on an admissible Hilbert-Hadamard space. Admissible Hilbert-Hadamard spaces are a class of (possibly infinite-dimensional)…

K-Theory and Homology · Mathematics 2021-03-03 Sherry Gong , Jianchao Wu , Guoliang Yu

This paper attempts to provide an analogue of the Novikov conjecture for algebraic (or K\"{a}hler) manifolds. Inter alia, we prove a conjecture of Rosenberg's on the birational invariance of higher Todd genera. We argue that in the…

Algebraic Geometry · Mathematics 2007-05-23 Jonathan Block , Shmuel Weinberger

The class of Novikov algebras is a popular object of study among classical nonassociative algebras. The generic example of a Novikov algebra may be obtained from a differential associative and commutative algebra. We consider a more general…

Rings and Algebras · Mathematics 2023-10-26 P. Kolesnikov , B. Sartayev

A proof of Thompson's conjecture for real semi-simple Lie groups has been given by Kapovich, Millson, and Leeb. In this note, we give another proof of the conjecture by using a theorem of Alekseev, Meinrenken, and Woodward from symplectic…

Symplectic Geometry · Mathematics 2007-05-23 Jiang-Hua Lu , Sam Evens

We explore an application of homological algebra to set theoretic objects by developing a cohomology theory for Hausdorff gaps. The cohomology theory is introduced with enough generality to be applicable to other questions in set theory.…

Logic · Mathematics 2016-09-06 Daniel Talayco

We construct a geometric model for the mapping class group M of a non-exceptional oriented surface of finite type and use it to show that the action of M on the compact Hausdorff space of complete geodesic laminations is topologically…

Group Theory · Mathematics 2008-03-19 Ursula Hamenstaedt
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