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arXiv research

A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

169,341 papers · 148 categories

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48 results for Dirac type

Study on monopoles with singularities on 3-folds, proving Fredholmness and calculating L2L^2-indices.

problem Analyzing monopoles with Dirac-type singularities on 3-folds.
method Proving Fredholmness and calculating L2L^2-indices of Dirac operators of monopoles.
result Proved Fredholmness and calculated L2L^2-indices of Dirac operators of monopoles with Dirac-type singularities.

The paper proves formulas and theorems for Dirac-Witten operators on manifolds with or without boundaries.

problem Analyzing Dirac-Witten operators on manifolds with boundaries.
method Obtained Lichnerowicz type formulas and proved Kastler-Kalau-Walze type theorems.
result Validated Kastler-Kalau-Walze type theorems for 4D and 6D compact manifolds with or without boundaries.

We considered an extension of the standard functional for the Einstein-Dirac equation where the Dirac operator is replaced by the square of the Dirac operator and a real parameter controlling the length of spinors is introduced. For one distinguished value of the parameter, the resulting Euler-Lagrange equations provid…

2006-03-29abs ↗pdf ↗

The paper proves a theorem for a twisted Dirac operator on specific manifolds.

problem Analyzing the Dirac operator with torsion on spin manifolds.
method Develops a Lichnerowicz type formula and proves a Kastler-Kalau-Walze type theorem.
result Proves a Kastler-Kalau-Walze type theorem for the JJ-twist of the Dirac operator with torsion on 4D and 6D almost product Riemannian spin manifolds.

The paper proves a theorem for a twisted Dirac operator on specific manifolds.

problem Analyzing the J-twist of the Dirac operator on spin manifolds.
method Lichnerowicz type formula and Kastler-Kalau-Walze type theorem for the J-twist of the Dirac operator.
result Proves a Kastler-Kalau-Walze type theorem for the J-twist of the Dirac operator on 3D and 4D almost product Riemannian spin manifolds with boundary.

Study of Dirac equation with non-local nonlinearity on spheres.

problem Conformally invariant Dirac equation with non-local nonlinearity.
method Investigation of compactness, bubbling, and energy quantization of energy functional; characterization of ground state solutions; proof of Aubin-type inequality and Brezis-Nirenberg type result.
result Existence of solutions to the conformal Einstein-Dirac problem in dimension 4.

Study shows strict inequality for Dirac-type equation on spin manifolds, leading to existence results.

problem Investigating strict inequality for a Dirac-type equation on compact spin manifolds.
method Analyzing a generalized conformally invariant equation involving the Dirac operator with a non-linear convolution term.
result Strict inequality holds, except for round sphere conformal cases, providing existence results for a ground state.

Formula for index of Dirac-type operators on stratified spaces.

problem Calculating the index of Dirac-type operators on complex geometric structures.
method Defined a closed domain, proved self-adjoint and Fredholm properties, established index formula.
result Proved a formula for the Chern character of the index of Dirac-type operators.

We use the spectra of Dirac type operators on the sphere SnS^{n} to produce sharp L2L^{2} inequalities on the sphere. These operators include the Dirac operator on SnS^{n}, the conformal Laplacian and Paenitz operator. We use the Cayley transform, or stereographic projection, to obtain similar inequalities for powers o…

2007-11-25abs ↗pdf ↗

The paper proves new theorems for Dirac operators on even-dimensional manifolds with boundary.

problem Proving theorems for Dirac operators on manifolds with boundary.
method Establishing general Kastler-Kalau-Walze type theorems for conformal perturbations of Dirac operators.
result Proof of new theorems for Dirac operators on even-dimensional manifolds with boundary.

Study Dirac-Einstein equations on manifolds with boundary, focusing on constant volume and chiral conditions.

problem Analyzing Dirac-Einstein equations on manifolds with boundary conditions.
method Characterizing bubbling phenomena and classifying ground state bubbles, proving an Aubin-type inequality.
result Proved an Aubin-type inequality and existence result.

Classifies local boundary conditions for Dirac-type operators on manifolds.

problem Determining all local smooth boundary conditions for Dirac-type operators.
method Combining general theory of boundary value problems for Dirac operators and pointwise considerations.
result Classification of local self-adjoint regular boundary conditions for Dirac spinors in dimensions 3 and 4.

The paper proves a theorem for 5D spin manifolds with boundary using Dirac operator perturbations.

problem Proving a Kastler-Kalau-Walze type theorem for specific manifolds.
method Defining lower dimensional volumes and proving a theorem for 5D spin manifolds with boundary using Dirac operator perturbations.
result Proves a Kastler-Kalau-Walze type theorem for 5D spin manifolds with boundary.

Let PP be a non-negative self-adjoint Laplace type operator acting on sections of a hermitian vector bundle over a closed Riemannian manifold. In this paper we review the close relations between various PP-related coefficients such as the mollified spectral counting coefficients, the heat trace coefficients, the reso…

2015-09-01abs ↗pdf ↗

The Kobayashi-Hitchin correspondence is established for mini-holomorphic bundles on certain 3-folds.

problem Establishing a correspondence between mini-holomorphic bundles and HE-monopoles.
method Defining mini-holomorphic bundles, Dirac-type singularities, and admissible BHE-metrics.
result A special Hermitian metric (admissible BHE-metric) exists on slope stable mini-holomorphic bundles.

Develops a theorem for a 6D manifold with boundary.

problem No specific problem stated; focuses on extending a theorem.
method Extends a Kastler-Kalau-Walze type theorem to 6D almost product Riemannian spin manifolds with boundary.
result Proves a Kastler-Kalau-Walze type theorem for 6D manifolds.

Generalizes Kastler-Kalau-Walze theorem to even-dimensional manifolds.

problem Proving a theorem for a specific type of Dirac operator on various manifolds.
method Extending previous results to even-dimensional almost product Riemannian spin manifolds.
result Established the general Kastler-Kalau-Walze type theorem for even-dimensional manifolds.

Study perturbs Dirac operator on 4D manifolds, proving Kastler-Kalau-Walze theorems.

problem Analyzing perturbations of Dirac operator on compact manifolds.
method Defining pseudo-differential perturbations and proving Kastler-Kalau-Walze theorems.
result Proved Kastler-Kalau-Walze theorems for 4D compact manifolds with boundary.

Constructs equivariant spectral flow for Dirac-type operators on manifolds.

problem Calculating spectral flow for Dirac-type operators on manifolds with group actions.
method Equivariant spectral flow construction for paths of Dirac-type operators on manifolds.
result Relates delocalised η-invariants and ρ-invariants for different positive scalar curvature metrics.

Study on symplectic Dirac operators on foliations, estimating eigenvalues.

problem Estimating eigenvalues of transversely symplectic Dirac operators.
method Analysis of transversely symplectic structures and use of Weitzenbock formula.
result Estimation of lower bounds for eigenvalues of transversely symplectic Dirac operators.

Study eigenvalues and nodal sets of twisted Dirac operators on surfaces.

problem Eigenvalue and nodal set estimates for twisted Dirac operators.
method Derive an inequality relating eigenvalues and nodal sets, using eigenvalue estimates for the Spin^c Dirac operator.
result Eigenvalue estimates for twisted Dirac operators and Liouville type results.

Study on Palais-Smale sequences for conformal Dirac-Einstein problem, proving existence of solutions.

problem Existence of solutions to conformal Dirac-Einstein problem.
method Characterization of Palais-Smale sequences, proving Aubin type result, showing existence of infinitely many solutions.
result Existence of positive solutions and infinitely many solutions under certain symmetries.

We introduce Dirac processes, using Dirac delta functions, for short-rate-type pricing of financial derivatives. Dirac processes add spikes to the existing building blocks of diffusions and jumps. Dirac processes are Generalized Processes, which have not been used directly before because the dollar value of non-Real nu…

2015-04-17abs ↗pdf ↗

The paper explores Hermitian Clifford analysis and its connection to representation theory.

problem Determining if Hermitian Clifford operators are natural generalizations of orthogonal Dirac operators.
method Using representation theory of Lie groups to construct Dirac-type operators, but encountering issues with irreducibility of representations for Hermitian structures.
result The generalized gradient construction based on representation theory is the natural way to construct Dirac-type operators, but not for Hermitian Dirac operators due to representation issues.

The paper proves new theorems about specific types of operator perturbations.

problem Analyzing conformal perturbations of Dirac and signature operators.
method Developed Kastler-Kalau-Walze type theorems for specific operator types.
result Established new theorems for six-dimensional manifolds with boundary.

Proves Kastler-Kalau-Walze theorem for spectral Einstein functional on low-dimensional manifolds.

problem Proving Kastler-Kalau-Walze type theorems for spectral Einstein functional.
method Defining spectral Einstein functional associated with Dirac operator and proving theorem for low-dimensional manifolds.
result Proves Kastler-Kalau-Walze type theorem for spectral Einstein functional on low-dimensional manifolds with boundary.

Defines spectral Einstein functionals for sub-Dirac operators on manifolds with boundary.

problem Calculating Einstein-like functionals for sub-Dirac operators.
method Introduced spectral Einstein functional for sub-Dirac operators on manifolds with boundary.
result Proved a theorem for spectral Einstein functions on four-dimensional manifolds.

This paper extends Dabrowski-Sitarz-Zalecki theorems to manifolds with boundary.

problem Generalizing theorems to manifolds with boundary.
method Extending results of Dabrowski etc. to 4D oriented Riemannian manifolds with boundary.
result Proof of Dabrowski-Sitarz-Zalecki type theorems for manifolds with boundary.

We analyze the limit of the spectrum of a geometric Dirac-type operator under a collapse with bounded diameter and bounded sectional curvature. In the case of a smooth limit space B, we show that the limit of the spectrum is given by the spectrum of a certain first-order differential operator on B, which can be constru…

2000-05-01abs ↗pdf ↗

The paper introduces spectral Einstein functionals for Dirac operators on manifolds with boundary.

problem Analyzing perturbations of Dirac operators on manifolds with boundary.
method Introduction of spectral Einstein functionals and proof of Dabrowski-Sitarz-Zalecki type theorems.
result Proof of theorems associated with spectral Einstein functionals for perturbations of Dirac operators.