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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.

168,695 papers · 148 categories

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336698131 · Jun 202019922001200920172026
48 results for Vandermonde determinants

In the spirit of Bar Natan's construction of Khovanov homology, we give a categorification of the Vandermonde determinant. Given a sequence of positive integers x=(x1,...,xn)\vec{x}=(x_1,...,x_n), we construct a commutative diagram in the shape of the Bruhat order on SnS_n whose nodes are colored smoothings of the 22-strand toru…

2018-11-20abs ↗pdf ↗

The paper establishes conditions for optimal sampling configurations on complex manifolds.

problem Finding optimal sampling configurations on complex manifolds.
method Analyzes point configurations on compact complex manifolds using tensor powers of Hermitian ample line bundles.
result Necessary and sufficient conditions for the existence of asymptotically Fekete sequences.

The article studies factorization structures in geometry and their applications to cones and polytopes.

problem Understanding and characterizing factorization structures in geometry.
method Comprehensive study of factorization structures, including structure theory, construction of compatible polytopes and cones, and derivation of generalised Gale's evenness condition.
result Established generalised Vandermonde identities and found examples of Delzant and rational Delzant compatible polytopes.

Optimal joint separation condition for radar and communications channels in dual-blind deconvolution.

problem Recovering information from overlaid radar and communications signals with unknown channels.
method Extremal functions from Beurling-Selberg interpolation theory for joint separation, nuclear norm minimization for matrix retrieval, and MUSIC for parameter estimation.
result Guaranteed well-conditioned Vandermonde matrix for MUSIC, validating theoretical findings.

Paper improves likelihood estimation for discrete distributions.

problem Computing profile maximum likelihood for discrete distributions.
method New bounds on Bethe and Sinkhorn permanents for low rank matrices.
result Achieves an approximation factor of exp(-O(sqrt(n) log n)) in polynomial time.

New combinatorial framework for geometric realizations of subword complexes.

problem Proving or disproving geometric realizations of subword complexes of Coxeter groups.
method Algebraic combinatorics and discrete geometry framework, parameter matrices.
result Existence of parameter matrices equivalent to realizability of subword complexes as chirotopes.

Geometrically interprets cup products and defines combinatorial Pin structures.

problem Understanding Steenrod's cup products and their geometric interpretation.
method Constructs vector fields and combinatorial frames to interpret cochain-level formulas.
result Geometrically interprets cup products and defines Pin structures combinatorially.

The main goal is to find the Homfly polynomial of a link formed by decorating each component of the Hopf link with the closure of a directly oriented tangle. Such decorations are spanned in the Homfly skein of the annulus by elements Q_λ, depending on partitions λ. We show how to find the 2-variable Homfly invariant <λ…

2001-08-02abs ↗pdf ↗

We show how to solve a number of problems in numerical linear algebra, such as least squares regression, p\ell_p-regression for any p1p \geq 1, low rank approximation, and kernel regression, in time $T(A) \poly(\log(nd))$, where for a given input matrix ARn×dA \in \mathbb{R}^{n \times d}, T(A)T(A) is the time needed to com…

2019-12-12abs ↗pdf ↗

The paper studies totally nonnegative parts of flag varieties and their topologies.

problem Understanding the topology of totally nonnegative flag varieties.
method Algebraic, geometric, and dynamical perspectives; orbit context; gradient flows; Riemannian metrics.
result Positivity is preserved in certain metrics on the totally nonnegative part of flag varieties.

It is shown that in a tower of coverings the regularized determinant of a generalized Laplacian converges to the L2L^2-determinant. This shows generic nontriviality of analytic torsion or regularized determinants since the L2L^2-counterparts are easier to compute. We further have an "Euler product expansion" for regula…

1995-11-23abs ↗pdf ↗

We investigate the Gram determinant of the bilinear form based on curves in a planar surface, with a focus on the disk with two holes. We prove that the determinant based on n1n-1 curves divides the determinant based on nn curves. Motivated by the work on Gram determinants based on curves in a disk and curves in an an…

2008-10-25abs ↗pdf ↗

Determinant modulo 8 classifies virtual knots based on polynomial coefficients.

problem Classifying virtual knots using determinant modulo 8.
method Introduced a determinant for checkerboard colorable virtual knots and proved its classification by the coefficient of z2z^2 in the ascending polynomial.
result Determinant modulo 8 classifies virtual knots based on polynomial coefficients.

Study on Laplacian determinant in isosceles triangles, finding equilateral triangle minimizes determinant.

problem Finding the minimum of the spectral determinant on isosceles triangles.
method Analyzing the determinant of the Laplacian on Euclidean isosceles triangle envelopes of fixed area.
result Equilateral triangle envelope minimizes the determinant of the Laplacian.

Study shows exponential growth of Laplacian determinant on random hyperbolic surfaces.

problem Understanding the behavior of Laplacian determinants on random hyperbolic surfaces.
method Investigated various models of random hyperbolic surfaces and their Laplacian determinants as genus increases.
result For all popular models, the determinant grows exponentially with a universal exponent as the genus goes to infinity.

Identifies images of determinant morphism for specific co-Higgs bundles.

problem Determining images of determinant morphism for co-Higgs bundles.
method Identifying images of the determinant morphism of trace-free co-Higgs bundles modeled on rank 2 Schwarzenberger bundles.
result Identified images of the determinant morphism for specific co-Higgs bundles.

We study the zeta determinant of global boundary problems of APS-type through a general theory for relative spectral invariants. In particular, we compute the zeta determinant for Dirac-Laplacian boundary problems in terms of a scattering Fredholm determinant over the boundary.

2004-06-16abs ↗pdf ↗

We give definitions of cohomology determinants for compact, connected, orientable 3-manifolds. We also give formulae relating cohomology determinants before and after gluing a solid torus along a torus boundary component. Cohomology determinants are related to Turaev torsion, though the author hopes that they have othe…

2006-11-08abs ↗pdf ↗

The Gram determinant of type AA was introduced by Lickorish in his work on invariants of 3 - manifolds. We generalize the theory of the Gram determinant of type AA by evaluating, in the annulus, a bilinear form of non-intersecting connections in the disc. The main result provides a closed formula for this Gram determ…

2019-05-20abs ↗pdf ↗

We compute the relative zeta-function metric on the determinant line bundle for a family of elliptic boundary value problems of Dirac-type. To do this we prove a general formula relating the zeta-determinant to a Fredholm determinant over the boundary for a class of higher-order elliptic boundary value problems.

1999-10-27abs ↗pdf ↗

The paper connects Chebyshev polynomials and Gram determinants on Möbius bands.

problem Exploring the relationship between Chebyshev polynomials and Gram determinants on Möbius bands.
method Analyzing Mersenne numbers and Chebyshev polynomials, proving conjectures, and developing algorithms.
result A factor of the Gram determinant supports a conjecture about its closed formula involving Chebyshev polynomials.

Study on pseudo-Einstein 3-manifolds, calculating determinant changes under conformal transformations.

problem Prescribing the Q'-curvature on pseudo-Einstein 3-manifolds.
method Established an expression for the difference of determinants of Paneitz type operators under conformal changes.
result Generalized the expression of functional determinant from four to three dimensions.

Determinants of theta curves and symmetric graphs are studied.

problem Understanding the determinants of theta curves and symmetric graphs.
method Combinatorial approach using Kirchhoff's Matrix Tree Theorem and spanning tree enumeration.
result The determinant of a simple theta curve is the product of the determinants of its constituent knots.

The purpose of this paper is to present the construction of a canonical determinant functional on elliptic pseudodifferential operators associated to the Guillemin-Wodzicki residue trace. The resulting functional is multiplicative, a local invariant, and not defined by a regularization procedure. The residue determinan…

2004-06-14abs ↗pdf ↗

The volume density of a hyperbolic link is defined as the ratio of hyperbolic volume to crossing number. We study its properties and a closely-related invariant called the determinant density. It is known that the sets of volume densities and determinant densities of links are dense in the interval [0,v_{oct}]. We cons…

2015-10-20abs ↗pdf ↗

We study the geometry and partial differential equations arising from the consideration of Frobenius determinants, also called-group-determinants. This leads us to address some aspects of twistor theory as well as some extensions of Bessel functions.

2018-04-05abs ↗pdf ↗

Paper discusses gluing formula for zeta-determinants with Robin boundary condition.

problem Computing zeta-determinants with Robin boundary condition.
method Uses BFK type gluing formula and computes differences with Dirichlet boundary condition.
result Computes zeta-determinant on a cylinder with Robin boundary condition.

Algorithms for Gaussian process, marginal likelihood methods or restricted maximum likelihood methods often require derivatives of log determinant terms. These log determinants are usually parametric with variance parameters of the underlying statistical models. This paper demonstrates that, when the underlying matrix …

2019-11-02abs ↗pdf ↗

We explain the bundle structures of the {\it Determinant line bundle} and the {\it Quillen determinant line bundle} considered on the connected component of the space of Fredholm operators including the identity operator in an intrinsic way. Then we show that these two are isomorphic and that they are non-trivial line …

2003-09-07abs ↗pdf ↗

Study uniquely determines Riemannian metric derivatives from boundary data.

problem Determining Riemannian metric derivatives from boundary data.
method Computing the full symbol of the elastic Dirichlet-to-Neumann map.
result The elastic Dirichlet-to-Neumann map uniquely determines all partial derivatives of the Riemannian metric on the boundary.

In \cite{BR1}, \cite{BR2}, a parabolic determinant line bundle on a moduli space of stable parabolic bundles was constructed, along with a Hermitian structure on it. The construction of the Hermitian structure was indirect: The parabolic determinant line bundle was identified with the pullback of the determinant line b…

2010-12-21abs ↗pdf ↗