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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.

169,051 papers · 148 categories

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48 results for q-deformed functions

Compactifies stability space for A2A_2 category, introducing qq-deformed rational numbers.

problem Stability conditions in triangulated categories and their compactifications.
method Embedding into an infinite-dimensional projective space, using B3B_3 braid group action.
result Two orbits in the boundary correspond to qq-deformed rational numbers.

Introduces qq-transpose for qq-deformed modular group matrices.

problem Understanding qq-deformed rational numbers and their properties.
method Introduces qq-transpose and applies it to refine qq-deformed modular group actions.
result New proof and refinement of Leclere and Morier-Genoud's trace palindromicity theorem.

New q-deformed integers help compute Jones polynomials efficiently.

problem Computing Jones polynomials of rational links efficiently.
method Defining q-deformed integers from pairs of coprime integers and using them to compute Jones polynomials.
result Efficient algorithm for computing Jones polynomials of rational links.

We discuss an approach to quantum gerbes over quantum groups in terms of q-deformation of transition functions for a loop group bundle. The case of the quantum group SUq(2) is treated in some detail.

2003-08-25abs ↗pdf ↗

Link between braid groups and q-deformed rationals solves a classification problem.

problem Classifying faithful complex specializations of the Burau representation of braid group B3.
method Established a link between Burau representation and q-deformed rational numbers.
result Proved faithfulness of Burau representation outside a specific annulus.

Finite specializations of a q-deformed modular group at roots of unity.

problem Understanding the finiteness of specializations of a q-deformed modular group at roots of unity.
method Introduced a q-deformed modular group and studied its specializations at roots of unity.
result For ζnζ_n being a primitive nth root of unity, PSLq(2,Z)q=ζn\operatorname{PSL}_q(2,{\mathbb Z})|_{q=ζ_n} is finite if and only if Gq(ζn)G_q(ζ_n) is finite.

Proves existence and uniqueness of loop equation solutions for semisimple Frobenius manifolds.

problem Existence and uniqueness of solutions to loop equations in generalized Frobenius manifolds.
method Proves existence and uniqueness of solutions to loop equations for semisimple generalized Frobenius manifolds.
result Existence and uniqueness of solutions to loop equations for semisimple generalized Frobenius manifolds.

We construct a braiding operator in terms of the quantum dilogarithm function based on the quantum cluster algebra. We show that it is a q-deformation of the R-operator for which hyperbolic octrahedron is assigned. Also shown is that, by taking q to be a root of unity, our braiding operator reduces to the Kashaev R-mat…

2014-04-08abs ↗pdf ↗

Unified treatment of gauge theories and Yang-Mills theory duality.

problem Unified treatment of gauge theories and Yang-Mills theory duality.
method Cohomological localization techniques and Atiyah-Singer index theorem.
result Unified framework and simplified derivations of localization formulas.

Geometrically, Legendrian surfaces related by surgery have related skein-valued cluster spaces.

problem Understanding the skein-valued cluster transformation in Legendrian surfaces.
method Geometric considerations of moduli of holomorphic curves.
result Skein-valued cluster transformation of Legendrian surfaces related by surgery.

Study of qq-rationals and their geometric properties, including deformed Farey triangulation and Springborn operations.

problem Geometry of qq-rationals and their properties.
method Construction and analysis of deformed Farey triangulation and deformed modular surface; definition and study of Springborn operations.
result Derivation of a formula for the qq-deformed midpoint and new qq-deformation of Markov numbers.

The theoretical basis for a candidate variational principle for the information bottleneck (IB) method is formulated within the ambit of the generalized nonadditive statistics of Tsallis. Given a nonadditivity parameter q q , the role of the \textit{additive duality} of nonadditive statistics (q=2q q^*=2-q ) in relating…

2008-11-19abs ↗pdf ↗

We extend neural networks with fractional and mixed activation functions for better function approximation.

problem Limitations in approximating higher-order smooth functions in complex spaces.
method Incorporating fractional exponents in activation functions and defining new density functions.
result Improved accuracy and broader applicability of neural network approximation theory.

Study tangle equations linking enzyme actions to knot theory.

problem Proving the Jones Unknot conjecture and understanding tangle solutions.
method Analyzing framed tangle equations and introducing Kauffman bracket ratios.
result Unique rational solutions for tangle equations imply the Jones Unknot conjecture.

We study the connection between topological strings and contact homology recently proposed in the context of knot invariants. In particular, we establish the proposed relation between the Gromov-Witten disk amplitudes of a Lagrangian associated to a knot and augmentations of its contact homology algebra. This also impl…

2013-04-21abs ↗pdf ↗

We conjecture formulae of the colored superpolynomials for a class of twist knots KpK_p where p denotes the number of full twists. The validity of the formulae is checked by applying differentials and taking special limits. Using the formulae, we compute both the classical and quantum super-A-polynomial for the twist k…

2012-09-06abs ↗pdf ↗

Constructs integrable hierarchies for generalized Frobenius manifolds with non-flat unity.

problem Integrable hierarchies for generalized Frobenius manifolds with non-flat unity.
method Constructs a bihamiltonian integrable hierarchy of hydrodynamic type.
result Integrable hierarchy possesses Virasoro symmetries and a tau structure.

This paper categorifies Chebyshev polynomials using diagrammatic algebra.

problem Categorifying two-variable Chebyshev polynomials of the second kind.
method Using A2A_2 spider and Karoubi envelope of A2A_2 spider, the recursive formula is shown.
result A qq-deformation of the two-variable Chebyshev polynomials is defined.

We review a construction of a new class of algebraic curves, called super-A-polynomials, and their quantum generalizations. The super-A-polynomial is a two-parameter deformation of the A-polynomial known from knot theory or Chern-Simons theory with SL(2,C) gauge group. The two parameters of the super-A-polynomial encod…

2013-03-15abs ↗pdf ↗

We study noncommutative bundles and Riemannian geometry at the semiclassical level of first order in a deformation parameter λλ, using a functorial approach. The data for quantisation of the cotangent bundle is known to be a Poisson structure and Poisson preconnection and we now show that this data defines to a functo…

2014-03-17abs ↗pdf ↗

We introduce and compute a 2-parameter family deformation of the A-polynomial that encodes the color dependence of the superpolynomial and that, in suitable limits, reduces to various deformations of the A-polynomial studied in the literature. These special limits include the t-deformation which leads to the "refined A…

2012-05-07abs ↗pdf ↗

New complex structures found in quantum SU(3) manifold.

problem Exploring non-commutative complex structures in quantum SU(3) manifold.
method Examined the rank two case of quantum SU(3) manifold, analyzing its differential calculus and non-commutative complex geometry.
result Found that the number of almost-complex structures reduces from 8 to 4, and each is integrable (complex structure).

Develops methods for selecting and estimating smooth functional coefficients in high-dimensional multivariate functional data.

problem Functional predictor selection and estimation of smooth functional coefficients in high-dimensional multivariate functional data.
method Functional group-sparse regression methods in a generic Hilbert space of infinite dimension.
result Consistency of estimation and selection (oracle property) under infinite-dimensional Hilbert spaces.

FFBO optimizes functions as inputs and outputs, improving on existing BO methods.

problem Optimizing functions as both inputs and outputs in complex systems.
method Function-on-function Gaussian process (FFGP) model with a separable operator-valued kernel, scalar upper confidence bound (UCB) acquisition function, and scalable functional gradient ascent algorithm (FGA).
result FFBO outperforms existing methods in synthetic and real-world data.

Chirped sinosoids and interferometric phase plots are functions that are not periodic, but are the composition of a smooth function and a periodic function. These functions functions factor into a pair of maps: from their domain to a circle, and from a circle to their codomain. One can easily imagine replacing the circ…

2015-01-25abs ↗pdf ↗

The Fridman function is bounded by the injectivity radius for certain hyperbolic manifolds.

problem Bounding the Fridman function for hyperbolic manifolds.
method Analyzing the relationship between the Fridman function and the injectivity radius function.
result The Fridman function is bounded above by the injectivity radius function for certain hyperbolic manifolds.

The paper extends mixability theory to function-valued forecasts, proving various loss functions are mixable.

problem Efficient aggregation of functional and probabilistic forecasts in online prediction games.
method Adapting mixable and exponentially concave loss functions to function-valued forecasts.
result Various loss functions used for probabilistic forecasting are mixable (exp-concave).

The paper proves isoparametric functions on Finsler space forms under specific conditions.

problem Understanding isoparametric functions in Finsler space forms.
method Proving transnormal functions as isoparametric functions and constructing global and local isoparametric functions using the distance function.
result Generalization of Theorem B to Finsler space forms.

Paper introduces a nonparametric functional graphical model for random functions.

problem Estimating probabilistic conditional independence in functional graphical models.
method Functional sufficient dimension reduction to relax Gaussian or copula Gaussian assumptions.
result Enhances estimation accuracy and retains probabilistic conditional independence.

Deep neural networks with various activation functions can approximate Hölder smooth functions.

problem Expressivity of deep neural networks with general activation functions.
method Investigates approximation ability of deep neural networks with a broad class of activation functions, including Hölder smooth functions.
result Derives the required depth, width, and sparsity of deep neural networks to approximate Hölder smooth functions.

Robustifies elicitable functionals to handle small distribution misspecifications.

problem Determining uniquely optimal forecasts under distributional misspecification.
method Integrates statistical robustness into elicitable functionals using Kullback-Leibler divergence.
result Robust elicitable functionals admit unique solutions at the boundary of uncertainty regions.

The paper characterizes strong Hamel functions using symmetries and proves their preservation properties.

problem Characterizing strong Hamel functions and their symmetries in Finsler spaces.
method Analyzing geodesic spray, strong dual symmetries, and strong dynamical symmetries.
result Strong Hamel functions can be characterized in terms of strong dual symmetries and strong dynamical symmetries.