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By means of a family of counter-examples, it is shown that the Reilly upper bound for the first eigenvalue of the Laplace operator for a compact submanifold in Euclidean space does not work for $n$-dimensional compact spacelike submanifolds…

Differential Geometry · Mathematics 2019-02-12 Francisco J. Palomo , Alfonso Romero

We determine what should correspond to the Dirac operator on certain quantized hermitian symmetric spaces and what its properties are. A new insight into the quantized wave operator is obtained.

Quantum Algebra · Mathematics 2007-05-23 Hans Plesner Jakobsen

In this short note, using the Kendall-Cranston coupling, we study on K\"ahler (resp. quaternion K\"ahler) manifolds first eigenvalue estimates in terms of dimension, diameter, and lower bounds on the holomorphic (resp. quaternionic)…

Probability · Mathematics 2021-12-09 Fabrice Baudoin , Gunhee Cho , Guang Yang

In this paper, we compute the noncommutative residue for the rescaled Dirac operator fDh on 6-dimensional compact manifolds without boundary. And we give the proof of the Kastler-Kalau-Walze type theorem for the rescaled Dirac operator fDh…

Differential Geometry · Mathematics 2024-07-23 Tong Wu , Yong Wang

We apply the Cartan-Kahler theorem for the k-Dirac operator studied in Clifford analysis and to the parabolic version of this operator. We show that for k = 2 the tableaux of the first prolongations of these two operators are involutive.…

Differential Geometry · Mathematics 2019-08-06 Tomas Salac

Based on the exact relationship to Random Matrix Theory, we derive the probability distribution of the k-th smallest Dirac operator eigenvalue in the microscopic finite-volume scaling regime of QCD and related gauge theories.

High Energy Physics - Theory · Physics 2009-10-31 P. H. Damgaard , S. M. Nishigaki

We compute estimates for eigenvalues of a class of linear second-order elliptic differential operators in divergence form (with Dirichlet boundary condition) on a bounded domain in a complete Riemannian manifold. Our estimates are based…

Differential Geometry · Mathematics 2021-12-16 José N. V. Gomes , Juliana F. R. Miranda

In this paper, we investigate the Dirchlet eigenvalue problems of poly-Laplacian with any order and quadratic polynomial operator of the Laplacian. We give some estimates for lower bounds of the sums of their first $k$ eigenvalues which…

Differential Geometry · Mathematics 2011-12-14 Qing-Ming Cheng , He-Jun Sun , Guoxin Wei , Lingzhong Zeng

We are concerned with the dependence of the lowest positive eigenvalue of the Dirac operator on the geometry of rectangles, subject to infinite-mass boundary conditions. We conjecture that the square is a global minimiser both under the…

Spectral Theory · Mathematics 2022-08-22 Philippe Briet , David Krejcirik

Properties of the Cauchy-Riemann-Fueter equation for maps between quaternionic manifolds are studied. Spaces of solutions in case of maps from a K3-surface to the cotangent bundle of a complex projective space are computed. A relationship…

Differential Geometry · Mathematics 2008-05-30 Andriy Haydys

It is shown that the eigenvalue problem for the hermitian Wilson-Dirac operator of for a uniform magnetic field in two dimensions can be reduced to one-dimensional problem described by a relativistic analog of the Harper equation. An…

High Energy Physics - Lattice · Physics 2009-11-07 H. Kurokawa , T. Fujiwara

In this paper, we give a new lower bound for the eigenvalues of the Dirac operator on a compact spin manifold. This estimate is motivated by the fact that in its limiting case a skew-symmetric tensor (see Equation \eqref{eq:16}) appears…

Differential Geometry · Mathematics 2009-11-13 Georges Habib

We derive an analytical expression for the distribution of the k-th smallest Dirac eigenvalue in QCD with imaginary isospin chemical potential in the Dirac operator. Because of its dependence on the pion decay constant F through the…

High Energy Physics - Lattice · Physics 2015-06-03 G. Akemann , A. C. Ipsen

In this paper we establish an analogue of the classical Lichnerowicz' theorem giving a sharp lower bound of the first non-zero eigenvalue of the sub-Laplacian on a compact seven-dimensional quaternionic contact manifold, assuming a lower…

Differential Geometry · Mathematics 2014-04-18 Alexander Petkov

Motivated by relativistic materials, we develop a numerical scheme to support existing or state new conjectures in the spectral optimisation of eigenvalues of the Dirac operator, subject to infinite-mass boundary conditions. We study the…

Optimization and Control · Mathematics 2025-02-05 Pedro R. S. Antunes , Francisco Bento , David Krejcirik

We obtain geometric estimates for the first eigenvalue and the fundamental tone of the p-laplacian on manifolds in terms of admissible vector fields. Also, we defined a new spectral invariant and we show its relation with the geometry of…

Differential Geometry · Mathematics 2008-08-15 Barnabe P. Lima , J. Fabio Montenegro , Newton L. Santos

We derive an integral inequality between the mean curvature and the scalar curvature of the boundary of any scalar flat conformal compactifications of Poincar{\'e}-Einstein manifolds. As a first consequence , we obtain a sharp lower bound…

Differential Geometry · Mathematics 2019-09-19 Simon Raulot

We consider an elliptic self-adjoint first order pseudodifferential operator acting on columns of m complex-valued half-densities over a connected compact n-dimensional manifold without boundary. The eigenvalues of the principal symbol are…

Analysis of PDEs · Mathematics 2012-05-01 Olga Chervova , Robert J. Downes , Dmitri Vassiliev

This article is one of a series of papers. For this decade, the Dirac operator on a submanifold has been studied as a restriction of the Dirac operator in $n$-dimensional euclidean space $\EE^n$ to a surface or a space curve as physical…

Differential Geometry · Mathematics 2007-05-23 Shigeki Matsutani

We demonstrate lower bounds for the eigenvalues of compact Bakry-Emery manifolds with and without boundary. The lower bounds for the first eigenvalue rely on a generalised maximum principle which allows gradient estimates in the Riemannian…

Spectral Theory · Mathematics 2020-12-14 Nelia Charalambous , Zhiqin Lu , Julie Rowlett
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