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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.

168,742 papers · 148 categories

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122243365486 · May 202619922001200920172026
48 results for Mobius structures

The boundary of a Möbius manifold carries a canonical Möbius structure. This enables one to define the cobordism group of nn-dimensional (closed) Möbius manifolds. The purpose of this note is to show that the cobordism group of Möbius circles is zero, i.e., every Möbius circle bounds a Möbius surface. We also complete…

2006-05-22abs ↗pdf ↗

Constructs Lorentzian manifolds from Riemannian conformal structures.

problem Creating Lorentzian manifolds from Riemannian conformal structures.
method Starting from a Riemannian conformal structure, a family of Lorentzian manifolds is constructed using a metric in the conformal class and a 1-parameter family of tensor fields.
result Every Mobius structure on a Riemannian conformal structure arises from this construction.

This paper studies Jones-Wenzl idempotents in the twisted I-bundle over the Möbius band.

problem Understanding Jones-Wenzl idempotents in the Kauffman bracket skein module of the twisted I-bundle over the Möbius band.
method Analyzing the trace of Jones-Wenzl idempotents in the Kauffman bracket skein module of the twisted I-bundle over the Möbius band.
result Uncovering analog properties of Jones-Wenzl idempotents in the Kauffman bracket skein module of the twisted I-bundle over the Möbius band that differ from the annulus case.

Geometric structures on quaternionic unit ball for slice regular Möbius transformations.

problem No new problem introduced.
method Introducing Hermitian, Riemannian, and Kähler-like structures on quaternionic unit ball using regular Möbius transformations.
result Geometric structures are natural generalizations of complex setup and solve problems not achieved by other geometries.

Smooth manifold structure on Möbius transformations of quaternionic ball identified.

problem Identifying the manifold structure of Möbius transformations of quaternionic unit ball.
method Realizing M(B)\mathcal{M}(\mathbb{B}) as a quotient of Sp(1,1)\mathrm{Sp}(1,1) and using Lie group properties.
result The manifold M(B)\mathcal{M}(\mathbb{B}) is diffeomorphic to R4imesS3\mathbb{R}^4 imes S^3.

One of the most challenging problems in the domain of 2-D image or 3-D shape is to handle the non-rigid deformation. From the perspective of transformation groups, the conformal transformation is a key part of the diffeomorphism. According to the Liouville Theorem, an important part of the conformal transformation is t…

2018-08-30abs ↗pdf ↗

This study analyzes a non-orientable spacetime model in 1+1D quantum gravity.

problem Analyzing a non-orientable spacetime model in 1+1D quantum gravity.
method Formulated a Jackiw-Teitelboim gravity toy model on the Möbius band, computed Stiefel-Whitney classes, and analyzed the Dirac operator.
result Half-integer momentum quantization, spectral symmetry, vanishing mod-2 index, and η_D(0) = 0 follow.

A conformal structure on a manifold MnM^n induces natural second order conformally invariant operators, called Möbius and Laplace structures, acting on specific weight bundles of MM, provided that n3n\ge 3. By extending the notions of Möbius and Laplace structures to the case of surfaces and curves, we develop here th…

2014-11-17abs ↗pdf ↗

The study classifies conformal biharmonic and k-polyharmonic maps between space forms.

problem Classifying conformal biharmonic and k-polyharmonic maps between space forms.
method Proving conditions for proper biharmonic and k-polyharmonic maps between space forms.
result Proper k-polyharmonic conformal maps exist if and only if the dimension is 2k.

On a conformal manifold, it is well known that parallel sections of the standard tractor bundle with non-vanishing scale are in 1-1 correspondence with solutions of the conformal Einstein equation. In 2 dimensions conformal geometry carries no local information but one can remedy this by equipping the surface with a Mö…

2013-10-21abs ↗pdf ↗

The paper explores projective structures on curves and their applications in conformal geometry.

problem Finding qualitative information about solutions of Hill equations.
method Detailed description of projective structures and their isomorphism classes, correcting previous inaccuracies.
result The Yamabe problem for curves has no general solutions in a conformal/Möbius ambient space.

We give a condition for a function to produce a Möbius invariant weighted inner product on the tangent space of the space of knots, and show that some kind of Möbius invariant knot energies can produce Möbius invariant and parametrization invariant weighted inner products. They would give a natural way to study the evo…

2019-05-15abs ↗pdf ↗

We introduce a new discretization of O'Hara's Möbius energy. In contrast to the known discretizations of Simon and Kim and Kusner it is invariant under Möbius transformations of the surrounding space. The starting point for this new discretization is the cosine formula of Doyle and Schramm. We then show ΓΓ-convergence…

2018-09-21abs ↗pdf ↗

Classifies S1S^1-invariant free boundary minimal annuli and Möbius bands in Bn\mathbb{B}^n.

problem Classifying S1S^1-invariant free boundary minimal annuli and Möbius bands in Bn\mathbb{B}^n.
method Analysis of the spectrum of the Dirichlet-to-Neumann map for S1S^1-invariant metrics.
result Existence and classification of S1S^1-invariant free boundary minimal annuli and Möbius bands in Bn\mathbb{B}^n.

Researchers establish bounds and continuity of decomposed Möbius energies using cosine formula.

problem Estimating the bounds and continuity of decomposed Möbius energies.
method Using the cosine formula to evaluate upper and lower bounds and modulus of continuity of decomposed energies.
result Affirmative answer to the question of estimating decomposed energies using the cosine formula.

Paper shows how to embed Möbius bands with many twists and small aspect ratios.

problem Finding the smallest aspect ratio for Möbius bands with many twists.
method Constructs a folded paper ribbon knot to bound the aspect ratio.
result Paper Möbius bands and annuli with any number of half-twists can be embedded with aspect ratio less than 8.

Study generalizes Möbius energy to non-smooth sets in arbitrary dimensions.

problem Investigate Möbius-invariant energies on non-smooth subsets of arbitrary dimensions.
method Show local finite energy implies embedded Lipschitz submanifold, and low fractional Sobolev regularity guarantees finite energy.
result Local graph structure of low fractional Sobolev regularity on a set is sufficient to guarantee finite energy.

Researchers find a method to construct projective structures on a specific surface.

problem Constructing projective structures with given holonomy and tameness conditions.
method Grafting circular triangles determined by a natural framing of the representation.
result All structures satisfying the conditions can be obtained through this method.

We prove optimal systolic inequalities on Finsler Mobius bands relating the systole and the height of the Mobius band to its Holmes-Thompson volume. We also establish an optimal systolic in- equality for Finsler Klein bottles of revolution, which we conjecture to hold true for arbitrary Finsler metrics. Extremal metric…

2015-03-04abs ↗pdf ↗

The paper studies Möbius energy gradient of helix pairs and finds limiting behavior as coiling ratio increases.

problem Characterizing the limiting behavior of Möbius energy gradient for symmetric helix pairs.
method Complex asymptotics
result The gradient diverges in opposing directions based on radius, approaching 1/2 as coiling ratio increases.

We extend a result regarding the Random Backward Iteration algorithm for drawing Julia sets (known to work for certain rational semigroups containing a non-Möbius element) to a class of Möbius semigroups which includes certain settings not yet been dealt with in the literature, namely, when the Julia set is not a thick…

2015-11-09abs ↗pdf ↗

In this paper we characterize compact extended Ptolemy metric spaces with many circles up to Möbius equivalence. This characterization yields a Möbius characterization of the nn-dimensional spheres SnS^n and hemispheres S+nS^n_+ when endowed with their chordal metrics. In particular, we show that every compact extended…

2010-08-19abs ↗pdf ↗

Study shows non-orientable manifolds restrict signature-changing metrics globally.

problem Global obstructions to signature-changing metrics on non-orientable manifolds.
method Explicit geometric constructions based on Möbius strip topology.
result Radical of signature-changing metrics cannot be everywhere transverse.

The study applies spatial density models to mobile node movements using Möbius distributions.

problem Modeling the steady-state density of mobile nodes on a 2D terrain.
method Used mixture density networks with Möbius distributions to describe node density over a disk.
result Möbius distributions are more suitable for capturing radial changes in node density compared to Gaussian distributions.

The paper proves stability for Möbius transformations in high dimensions.

problem Quantifying how close a map is to a Möbius transformation.
method Local average conformal-isoperimetric deficit controls map deviation.
result Optimal bounds on the deviation of maps from Möbius transformations.

We define and study a Möbius invariant energy associated to planar domains, as well its generalization to space curves. This generalization is a Möbius version of Banchoff-Pohl's notion of area enclosed by a space curve. A relation with Gauss-Bonnet theorems for complete surfaces in hyperbolic space is also described.

2010-10-19abs ↗pdf ↗

Proves constraints on groups extending Möbius transformations on spheres.

problem Constraints on groups extending Möbius transformations on spheres.
method Proved constraints through group transitivity and topological entropy analysis.
result Groups must be 4-transitive or arc 4-transitive, and contain elements of positive topological entropy.

CMC-1 surfaces linked via Möbius transformations between circle patterns.

problem Characterizing and relating CMC-1 surfaces via circle patterns.
method Osculating Möbius transformations between circle patterns induce realizations in hyperbolic space.
result One-to-one correspondence between CMC-1 surfaces under specific conditions.

Study on triviality of tangent and generalized tangent bundles of manifolds.

problem Triviality of tangent and generalized tangent bundles of manifolds.
method Analyzing relations between tangent bundle TMTM and generalized tangent bundle TM=TMTM\mathbb{T}M = TM\oplus T^*M of manifolds.
result The generalized tangent bundle of a parallelizable manifold is trivial, but the converse is not always true.