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We introduce the_inertial cohomology ring_ NH^*_T(Y) of a stably almost complex manifold carrying an action of a torus T. We show that in the case that Y has a locally free action by T, the inertial cohomology ring is isomorphic to the…

Symplectic Geometry · Mathematics 2009-09-10 Rebecca Goldin , Tara S. Holm , Allen Knutson

Let $M$ be complex projective manifold, and $A$ a positive line bundle on it. Assume that $SU(2)$ acts on $M$ in a Hamiltonian manner, with nowhere vanishing moment map, and that this action linearizes to $A$. Then there is an associated…

Symplectic Geometry · Mathematics 2018-05-03 Andrea Galasso , Roberto Paoletti

We study the existence of uniformly bounded extension and trace operators for W^{1,p}-functions on randomly perforated domains, where the geometry is assumed to be stationary ergodic. Such extension and trace operators are important for…

Analysis of PDEs · Mathematics 2021-12-10 Martin Heida

We investigate determinants of Koszul complexes of holomorphic functions of a commuting tuple of bounded operators acting on a Hilbert space. Our main result shows that the analytic joint torsion, which compares two such determinants, can…

K-Theory and Homology · Mathematics 2020-06-24 Jens Kaad , Ryszard Nest

The Bochner-Schr\"odinger operator $H_{p}=\frac 1p\Delta^{L^p}+V$ on high tensor powers $L^p$ of a Hermitian line bundle $L$ on a Riemannian manifold $X$ of bounded geometry is studied under the assumption of non-degeneracy of the curvature…

Spectral Theory · Mathematics 2025-12-09 Yuri A. Kordyukov

We describe large classes of compact self-adjoint Hankel operators whose eigenvalues have power asymptotics and obtain explicit expressions for the coefficient in front of the leading term. The results are stated both in the discrete and…

Spectral Theory · Mathematics 2016-01-07 Alexander Pushnitski , Dmitri Yafaev

The character variety $\mathscr{X}(S,G)$ associated to an oriented compact surface $S$ with boundary and a real reductive Lie group $G$ admits a Poisson structure and is foliated by symplectic leaves. When $G$ is a matrix group, any closed…

Geometric Topology · Mathematics 2025-09-04 Fernando Camacho-Cadena

This paper continues the study of link spectral invariants on compact surfaces, introduced in our previous work and shown to satisfy a Weyl law in which they asymptotically recover the Calabi invariant. Here we study their subleading…

Symplectic Geometry · Mathematics 2025-01-22 Dan Cristofaro-Gardiner , Vincent Humilière , Cheuk Yu Mak , Sobhan Seyfaddini , Ivan Smith

The Hamiltonian of a gravitational system defined in a region with boundary is quantized. The classical Hamiltonian, and starting point for the regularization, is required by functional differentiablity of the Hamiltonian constraint. The…

General Relativity and Quantum Cosmology · Physics 2009-10-31 Seth A. Major

Let L be a line bundle over a compact complex manifold X and endow L and TX with Hermitian metrics. Our main result provides a formula for the average distribution of the exponentially small eigenvalues of the corresponding Dolbeault…

Differential Geometry · Mathematics 2025-05-19 Robert J. Berman

We prove that Toeplitz operators are norm dense in the Toeplitz algebra $\mathfrak{T}(L^\infty)$ over the weighted Bergman space $\mathcal{A}^2_\nu(\Omega)$ of a bounded symmetric domain $\Omega\subset\mathbb{C}^n$. Our methods use…

Functional Analysis · Mathematics 2025-08-20 Vishwa Dewage

We describe the asymptotic behaviour of the quantum propagator generated by a Berezin-Toeplitz operator with real-valued principal symbol. We also give precise asymptotics for smoothed spectral projectors associated with the operator in the…

Differential Geometry · Mathematics 2025-06-27 Laurent Charles , Yohann Le Floch

A compact K\"ahler manifold $\left( M,\omega ,J\right) $ with $T$-symmetry admits a natural mixed polarization $\mathcal{P}_{\mathrm{mix}}$ whose real directions come from the $T$-action. In \cite{LW1}, we constructed a one-parameter family…

Symplectic Geometry · Mathematics 2024-10-01 Naichung Conan Leung , Dan Wang

We prove a homogenization result for a family of time-dependent Hamilton-Jacobi equations, rescaled by a parameter $\varepsilon$ tending to zero, posed on a periodic network, with a suitable notion of periodicity that will be defined. As…

Analysis of PDEs · Mathematics 2024-11-07 Marco Pozza , Antonio Siconolfi , Alfonso Sorrentino

The (local) invariant symplectic action functional $\A$ is associated to a Hamiltonian action of a compact connected Lie group $\G$ on a symplectic manifold $(M,\omega)$, endowed with a $\G$-invariant Riemannian metric $<\cdot,\cdot>_M$. It…

Symplectic Geometry · Mathematics 2012-09-04 Fabian Ziltener

In this article we provide a Hamilton-Jacobi formalism in locally conformally symplectic manifolds. Our interest in the Hamilton-Jacobi theory comes from the suitability of this theory as an integration method for dynamical systems, whilst…

Mathematical Physics · Physics 2024-06-19 Oğul Esen , Manuel de León , Cristina Sardón , Marcin Zajac

We construct a partial compactification of the moduli space, M_k, of SU(2) magnetic monopoles on R^3, wherein monopoles of charge k decompose into widely separated 'monopole clusters' of lower charge going off to infinity at comparable…

Differential Geometry · Mathematics 2015-12-10 Chris Kottke , Michael Singer

Let $G$ be a (non compact) connected simply connected locally compact second countable Lie group, either abelian or unimodular of type I, and $\rho$ an irreducible unitary representation of $G$. Then, we define the analytic torsion of $G$…

Functional Analysis · Mathematics 2023-04-25 A. Della Vedova , M. Spreafico

The aim of this paper is to formulate a local systolic inequality for odd-symplectic forms (also known as Hamiltonian structures) and to establish it in some basic cases. Let $\Omega$ be an odd-symplectic form on an oriented closed manifold…

Symplectic Geometry · Mathematics 2019-02-07 Gabriele Benedetti , Jungsoo Kang

In this paper we develop an abstract setup for hamiltonian group actions as follows: Starting with a continuous 2-cochain $\omega$ on a Lie algebra $h$ with values in an $h$-module $V$, we associate subalgebras $sp(h,\omega) \supeq…

Symplectic Geometry · Mathematics 2011-11-17 Karl-Hermann Neeb , Cornelia Vizman
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