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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.

169,341 papers · 148 categories

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48 results for waist inequalities

Uniform waist inequalities proven for manifolds with Kazhdan groups in codimension two.

problem Proving uniform waist inequalities for manifolds with specific group properties.
method Using finite covers and Cheeger inequality for manifolds with Kazhdan fundamental groups.
result Finite covers of manifolds with Kazhdan groups satisfy uniform waist inequalities in codimension two.

The paper proves waist inequalities for convex bodies and their linear images.

problem Understanding geometric characteristics of convex bodies through waist inequalities.
method Connections between Gromov's and Milman's work, proving waist inequalities for convex bodies and their linear images.
result Any convex body has a linear image satisfying a waist inequality with a universal constant.

The abstract applies waist inequality to dynamical systems and entropy.

problem Understanding the relationship between waist inequality and dynamical systems.
method Applying waist inequality to entropy and mean dimension of dynamical systems.
result Maps between dynamical systems have positive conditional metric mean dimension under certain conditions.

We introduce two numerical invariants, the waist and the trunk of knots. The waist of a closed incompressible surface in the complement of a knot is defined as the minimal intersection number of all compressing disks for the surface in the 3-sphere and the knot. Then the waist of a knot is defined as the maximal waist …

2009-05-27abs ↗pdf ↗

The waist inequality states that for a continuous map from S^n to R^q, not all fibers can have small (n-q)-dimensional volume. We construct maps for which most fibers have small (n-q)-dimensional volume and all fibers have bounded (n-q)-dimensional volume.

2014-02-12abs ↗pdf ↗

This paper studies the waist size of cusps in hyperbolic 3-manifolds, proving unique smallest sizes for specific manifolds.

problem Determining the smallest waist sizes of cusps in hyperbolic 3-manifolds.
method Analyzing the shortest nontrivial curves generated by parabolic isometries in maximal cusp boundaries.
result The next two smallest waist sizes are realized uniquely for specific manifolds.

The study quantifies topological expansion properties of complexes and their embeddings.

problem Understanding topological expansion properties of simplicial complexes.
method Quantifying topological expansion through sublinear functions and proving monotonicity under regular maps.
result Proves topological expanders contain graphical expanders and gives lower bounds for specific embeddings.

Consider a non-planar orientable minimal surface S in a slab which is possibly with genus or with more than two boundary components. We show that there exists a catenoidal waist W in the slab whose flux has the same vertical component as S such that Area(S)>= Area(W), provided the intersections of S with horizontal pla…

2015-03-10abs ↗pdf ↗

New maxfaces with catenoid or planar ends constructed using node-opening technique.

problem Lack of examples of maxfaces with catenoid or planar ends.
method Adapted node-opening technique to construct maxfaces of high genus.
result Singularities on constructed maxfaces form curves around the waists of the necks, with most singularities being cuspidal edges and the rest swallowtails.

The study finds infinitely many periodic orbits just above a critical value on a 2-sphere.

problem Finding periodic orbits just above a critical value on a 2-sphere.
method Introduced a new critical value c(L)c_\infty(L) and showed its strict inequality to the Mañé critical value c(L)c(L), proving the existence of infinitely many periodic orbits on energy levels e(c(L),c(L))e\in(c(L),c_\infty(L)).
result Infinitely many periodic orbits exist on energy levels just above the Mañé critical value.

Study of minimal surfaces in 4D with specific ends.

problem Characterize minimal surfaces in R4\mathbb{R}^4 with specific ends.
method Modification of Costa and Hoffman-Meeks method, generalized Weierstrass representation.
result Minimal surfaces with specific ends are JJ-holomorphic under certain conditions.

Method predicts NAFLD risk with high accuracy and distribution-free coverage guarantees.

problem Insufficient population-level screening tools for NAFLD.
method Gradient-boosted decision trees with conformal prediction.
result Method achieves AUROC of 0.912 internally and 0.891 externally, superior to other models.

New proof of Willmore inequality using geometric divergence inequality.

problem Proving the Willmore inequality for bounded domains.
method Using a parametric geometric inequality derived from a divergence form geometric differential inequality.
result New proofs of quantitative Willmore-type and weighted Minkowski inequalities.

The paper derives new inequalities on manifolds and applies them to convex hypersurfaces.

problem Deriving new inequalities on manifolds and convex hypersurfaces.
method Using Fourier theory and geometric implications of Poincare-type inequalities.
result Sharp Minkowski-type inequalities, including stability and Alexandrov-Fenchel inequalities.

The paper proves inequalities on Finsler manifolds under Ricci curvature bounds.

problem Proving (p,q)(p, q)-Sobolev and Nash inequalities on Finsler metric measure manifolds.
method Global pp-Poincaré inequality, (p,q)(p, q)-Sobolev inequality, Nash inequality derivation.
result Established global optimal (p,q)(p, q)-Sobolev inequality with a sharp constant.

The paper finds new inequalities for convex polygons.

problem Finding precise inequalities for convex polygons.
method Analytic isoperimetric inequalities based on Schur convex functions, followed by Bonnesen-style and inverse Bonnesen-style inequalities.
result Sharp discrete isoperimetric inequalities for planar convex polygons.

Study shows household inequality accounts for 30% of total global income inequality.

problem Intra-household inequality is often overlooked in studies of income inequality.
method Used LIS micro data to analyze inequality trends in 1973-2013 across multiple countries.
result At least 30% of total global income inequality is due to intra-household inequality.

The study improves Bochner inequality on Finsler manifolds to derive important inequalities.

problem Improving Bochner inequality on Finsler manifolds to derive new inequalities.
method Using improved Bochner inequality and its integrated form, the study derives a sharp Poincaré-Lichnerowicz inequality, a new proof for logarithmic Sobolev inequality, and an estimate of geodesic ball volumes.
result Derivation of new inequalities and estimates on Finsler manifolds.

The paper proves various inequalities on gradient shrinking Ricci solitons.

problem Understanding geometric inequalities on gradient shrinking Ricci solitons.
method Proving multiple inequalities equivalent on complete gradient shrinking Ricci solitons.
result Various inequalities (Sobolev, logarithmic Sobolev, Schrödinger, etc.) are equivalent on gradient shrinking Ricci solitons.

The paper develops inequalities for log-concave functions and related surface areas.

problem Understanding log-concave functions and their inequalities.
method Establishing new inequalities through f-divergences and functional affine surface areas.
result New inequalities on functional affine surface area and bounds for Kullback-Leibler divergence.

Sharp inequalities derived from fractional Sobolev inequalities on spheres.

problem Deriving sharp inequalities from fractional Sobolev inequalities.
method Alternative elementary argument using fractional Sobolev inequalities.
result Sharp Moser-Trudinger-Onofri inequalities derived from fractional Sobolev inequalities.

Proves inequalities on curved spaces with positive curvature.

problem Proving inequalities on manifolds with nonnegative Ricci curvature.
method Analyzes manifolds with nonnegative Ricci curvature and Euclidean volume growth.
result Proves Heisenberg-Pauli-Weyl, Hardy-Sobolev, and Caffarelli-Kohn-Nirenberg inequalities.

The paper derives inequalities on Finsler manifolds, influenced by their curvatures.

problem Deriving inequalities on Finsler manifolds.
method Local and global geometric inequalities on Riemannian and Finsler manifolds.
result Generalized Caffarelli-Kohn-Nirenberg and Hardy type inequalities on Finsler manifolds.

Paper compares ML models for a wall-following robot, achieving high accuracy.

problem Improving prediction accuracy of a wall-following robot's direction.
method Trained various machine learning models on a dataset of ultrasound sensor readings.
result Presented machine learning models with higher accuracy than previous work.

New inequalities for convex curves with multiple geometric factors.

problem Establishing inequalities for convex curves with multiple geometric factors.
method Parametric isoperimetric-type inequalities for closed convex curves with parameter conditions and equality conditions.
result Derived new inequalities and improved versions of existing inequalities.

Alternative proofs for various inequalities on Riemannian manifolds.

problem Various functional inequalities on Riemannian manifolds.
method Generic functional inequality, Riccati pairs, solving Riccati-type ODE.
result Alternative proofs for multiple inequalities, including Hardy-type and Caccioppoli inequalities.