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In this paper, by using Atiyah-Patodi-Singer index theorem, we obtain a formula for the signature of a flat symplectic vector bundle over a surface with boundary, which is related to the Toledo invariant of a surface group representation in…

Geometric Topology · Mathematics 2022-03-02 Inkang Kim , Pierre Pansu , Xueyuan Wan

We introduce multi-torsion, a spectral invariant generalizing Ray-Singer analytic torsion. We define multi-torsion for compact manifolds with a certain local geometric product structure that gives a bigrading on differential forms. We prove…

Differential Geometry · Mathematics 2021-08-02 Phillip Andreae

We consider first-order elliptic differential operators acting on vector bundles over smooth manifolds with smooth boundary, which is permitted to be noncompact. Under very mild assumptions, we obtain a regularity theory for sections in the…

Differential Geometry · Mathematics 2026-02-12 Christian Baer , Lashi Bandara

A diffeomorphism between the twistor spaces of two Riemannian metrics on a smooth manifold preserving the fibres is defined based on a well-known construction. It is shown that this bundle isomorphim is a holomorphic map with respect to the…

Differential Geometry · Mathematics 2024-02-20 Johann Davidov

We announce a Godbillon-Vey index formula for longitudinal Dirac operators on a foliated bundle $(X,\F)$ with boundary; in particular, we define a Godbillon-Vey eta invariant on the boundary foliation, that is, a secondary invariant for…

Differential Geometry · Mathematics 2011-02-15 Hitoshi Moriyoshi , Paolo Piazza

We study the low energy resolvent of the Hodge Laplacian on a manifold equipped with a fibred boundary metric. We determine the precise asymptotic behavior of the resolvent as a fibred boundary (aka $\phi$-) pseudodifferential operator when…

Differential Geometry · Mathematics 2024-06-21 Daniel Grieser , Mohammad Talebi , Boris Vertman

Let $X_0$ be a compact Riemannian manifold with boundary endowed with a oriented, measured even dimensional foliation with purely transverse boundary. Let $X$ be the manifold with cylinder attached and extended foliation. We prove that the…

Differential Geometry · Mathematics 2009-07-07 Paolo Antonini

This paper is devoted to a proof of a generalized Ray-Singer conjecture for a manifold with boundary (the Dirichlet and the Neumann boundary conditions are independently given on each connected component of the boundary and the transmission…

High Energy Physics - Theory · Physics 2008-02-03 Simeon Vishik

We investigate the properties of the Dirac operator on manifolds with boundaries in presence of the Atiyah-Patodi-Singer boundary condition. An exact counting of the number of edge states for boundaries with isometry of a sphere is given.…

High Energy Physics - Theory · Physics 2015-09-02 T. R. Govindarajan , Rakesh Tibrewala

We discuss the behaviour of the signature index class of closed foliated bundles under the operation of cutting and pasting. Along the way we establish several index theoretic results: we define Atiyah-Patodi-Singer (APS) index classes for…

Differential Geometry · Mathematics 2016-09-07 Eric Leichtnam , Paolo Piazza

We present an alternate definition of the mod {\bf Z} component of the Atiyah-Patodi-Singer $\eta$ invariant associated to (not necessary unitary) flat vector bundles, which identifies explicitly its real and imaginary parts. This is done…

Differential Geometry · Mathematics 2016-09-07 Xiaonan MA , Weiping Zhang

In the paper we consider the theory of elliptic operators acting in subspaces defined by pseudodifferential projections. This theory on closed manifolds is connected with the theory of boundary value problems for operators violating…

Differential Geometry · Mathematics 2015-06-26 A. Yu. Savin , B. Yu. Sternin

In this paper we discuss the refined analytic torsion on an odd dimensional compact oriented Riemannian manifold with boundary under some assumption. For this purpose we introduce two boundary conditions which are complementary to each…

Differential Geometry · Mathematics 2017-09-04 Rung-Tzung Huang , Yoonweon Lee

We prove that, if M is a compact oriented manifold of dimension 4k+3, where k>0, such that pi_1(M) is not torsion-free, then there are infinitely many manifolds that are homotopic equivalent to M but not homeomorphic to it. To show the…

Geometric Topology · Mathematics 2014-11-11 Stanley Chang , Shmuel Weinberger

We define a class of boundary value problems on manifolds with fibered boundary. This class is in a certain sense a deformation between the classical boundary value problems and the Atiyah-Patodi-Singer problems in subspaces. The boundary…

Operator Algebras · Mathematics 2007-05-23 A. Yu. Savin , B. Yu. Sternin

This paper relates the spectrum of the scalar Laplacian of an asymptotically hyperbolic Einstein metric to the conformal geometry of its ``ideal boundary'' at infinity. It follows from work of R. Mazzeo that the essential spectrum of such a…

dg-ga · Mathematics 2008-02-03 John M. Lee

Developing A.D. Aleksandrov's ideas, the first-named author of this article proposed the following approach to study of rigidity problems for the boundary of a $C^0$-submanifold in a smooth Riemannian manifold: Let $Y_1$ be a 2-dimensional…

Metric Geometry · Mathematics 2014-10-02 Anatoly P. Kopylov , Mikhail V. Korobkov

In this paper, we investigate analytical and geometric properties of certain non-compact boundary-manifolds, namely manifolds of bounded geometry. One result are strong Bochner type vanishing results for the L^2-cohomology of these…

Geometric Topology · Mathematics 2007-05-23 Thomas Schick

The Atiyah-Singer index theorem on a closed manifold is well understood and appreciated in physics. On the other hand, the Atiyah-Patodi-Singer index, which is an extension to a manifold with boundary, is physicist-unfriendly, in that it is…

High Energy Physics - Lattice · Physics 2021-12-22 Hidenori Fukaya

We define the equivariant family index of a family of elliptic operators invariant with respect to the free action of a bundle $\GR$ of Lie groups. If the fibers of $\GR \to B$ are simply-connected solvable, we then compute the Chern…

Differential Geometry · Mathematics 2007-05-23 Victor Nistor