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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.

168,694 papers · 148 categories

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88176264352 · Jun 202019922001200920172026
48 results for natural flow

Paper solves local well-posedness for Schrödinger flow into sphere with natural boundary conditions.

problem Local well-posedness of Schrödinger flow into S2\mathbb{S}^2 with natural boundary conditions.
method Developed a new approximation scheme to solve the problem.
result Solved the local well-posedness problem for the Schrödinger flow into S2\mathbb{S}^2 with natural boundary conditions.

We interpret the physical BB-field renormalization group flow in the language of Courant algebroids, clarifying the sense in which this flow is the natural "Ricci flow" for generalized geometry. Next we show that the BB-field renormalization group flow preserves T-duality in a natural sense. As corollaries we obtain …

2013-10-18abs ↗pdf ↗

We explore the harmonic-Ricci flow---that is, Ricci flow coupled with harmonic map flow---both as it arises naturally in certain principal bundle constructions related to Ricci flow and as a geometric flow in its own right. We demonstrate that one natural geometric context for the flow is a special case of the locally …

2010-12-01abs ↗pdf ↗

Study G2G_2-flows reducing to complex geometry flows, focusing on G2G_2-anomaly and G2G_2-Laplacian coflow.

problem Investigate flows of G2G_2-structures in relation to complex geometry.
method Analyze G2G_2-Laplacian coflow and G2G_2-anomaly flow, compare their properties.
result Compare G2G_2-anomaly flow to G2G_2-Laplacian coflow, investigate short-time existence and fixed points.

Let us consider a projective manifold and ΩΩ a volume form. We define the gradient flow associated to the problem of ΩΩ-balanced metrics in the quantum formalism, the Ωbalacingflow.Atthelimitofthequantization,weprovethatthe-balacing flow. At the limit of the quantization, we prove that the ΩbalacingflowconvergestowardsanaturalflowinKa¨hlergeometry,the-balacing flow converges towards a natural flow in Kähler geometry, the Ω$-Kä…

2011-02-05abs ↗pdf ↗

We study curvature flows in the locally homogeneous case (e.g. compact quotients of Lie groups, solvmanifolds, nilmanifolds) in a unified way, by considering a generic flow under just a few natural conditions on the broad class of almost-hermitian structures. As a main tool, we use an ODE system defined on the variety …

2013-06-25abs ↗pdf ↗

Autoregressive flow models can perform causal discovery and inference tasks.

problem Causal inference tasks such as causal discovery and interventional predictions.
method Using autoregressive flow models to estimate causal directions and make predictions.
result Autoregressive flows can accurately perform causal inference tasks without restrictive assumptions.

The paper improves the probability flow ODE sampler for faster sampling of natural images.

problem Improving the convergence rate of the probability flow ODE sampler.
method Adapting the probability flow ODE sampler to exploit intrinsic low-dimensional structures in natural image data.
result Achieves a dimension-free convergence rate of O(k/T)O(k/T) in total variation distance, improving upon existing results.

A new formulation of the Anomaly flow in the case of vanishing slope parameter is given, where the dependence on the global section of the canonical bundle appears only in the initial data. This allows a natural unification of the Anomaly flow with the Kähler-Ricci flow.

2019-05-06abs ↗pdf ↗

We develop a general approach to study geometric flows on homogeneous spaces. Our main tool will be a dynamical system defined on the variety of Lie algebras called the bracket flow, which coincides with the original geometric flow after a natural change of variables. The advantage of using this method relies on the fa…

2015-07-29abs ↗pdf ↗

In this paper we introduce a new geometric flow --- the hyperbolic gradient flow for graphs in the (n+1)(n+1)-dimensional Euclidean space Rn+1\mathbb{R}^{n+1}. This kind of flow is new and very natural to understand the geometry of manifolds. We particularly investigate the global existence of the evolution of convex hypers…

2010-09-21abs ↗pdf ↗

We illustrate the flow or wave character of the metrics and curvatures of evolving manifolds, introducing the Riemann flow and the Riemann wave via the bialternate product Riemannian metric. This kind of evolutions are new and very natural to understand certain flow or wave phenomena in the nature as well as the geomet…

2011-12-19abs ↗pdf ↗

We give a natural definition of geodesics on a Riemannian supermanifold and extend the usual geodesic flow defined on the cotangent bundle of the body of the supermanifold, associated to the induced Riemannian structure on the body, to a geodesic "superflow" on the cotangent bundle of the supermanifold. Integral curves…

2011-07-09abs ↗pdf ↗

We discuss from a geometric point of view the connection between the renormalization group flow for non--linear sigma models and the Ricci flow. This offers new perspectives in providing a geometrical landscape for 2D quantum field theories. In particular we argue that the structure of Ricci flow singularities suggests…

2010-01-20abs ↗pdf ↗

New flow defined to solve Hull-Strominger system, with estimates and convergence results.

problem Constructing solutions to the Hull-Strominger system of equations.
method Introducing a natural extension of pluriclosed flow and using string algebroids and higher gauge theory.
result Proves global existence and convergence of the flow on special backgrounds.

Closed-form flow matching yields similar performance to stochastic version, improving model performance.

problem Understanding why flow matching models generalize well.
method Empirical analysis and comparison of stochastic and closed-form flow matching losses.
result Closed-form flow matching can improve model performance.

Global existence and convergence of pluriclosed flow on Oeljeklaus-Toma manifolds.

problem Global existence and convergence of pluriclosed flow on specific complex manifolds.
method Established global existence with arbitrary initial data and Gromov-Hausdorff convergence of blowdown limits.
result Gromov-Hausdorff convergence of blowdown limits to a torus under conjectural bounds.

The (α,β)(α,β)-Ricci-Yamabe flow exists on closed manifolds.

problem Existence of solutions to the (α,β)(α,β)-Ricci-Yamabe flow.
method Showed short time existence and established long time existence theorems.
result Existence of smooth solutions to the (α,β)(α,β)-Ricci-Yamabe flow on closed manifolds.

The paper extends spin geometry to weighted manifolds and defines a new mass for Ricci flow.

problem Generalizing spin geometry to weighted manifolds and defining a new mass.
method Investigates spectral properties of the weighted Dirac operator and defines a new mass.
result Defines a new mass for weighted asymptotically Euclidean manifolds and shows its monotonicity under Ricci flow.

We introduce Lagrangian mean curvature flow with boundary in Calabi--Yau manifolds by defining a natural mixed Dirichlet-Neumann boundary condition, and prove that under this flow, the Lagrangian condition is preserved. We also study in detail the flow of equivariant Lagrangian discs with boundary on the Lawlor neck an…

2019-11-12abs ↗pdf ↗

Novel boundary conditions for Ricci flow to deform compact manifolds.

problem Deforming compact Riemannian manifolds with boundary using Ricci flow.
method Proposed boundary conditions that make first variations of functionals (Einstein-Hilbert action, lambda-functional) without boundary terms.
result Proof of short-term existence of solutions under proposed conditions.

We study the geometric flow of a planar curve driven by its curvature and the normal derivative of its capacity potential. Under a convexity condition that is natural to our problem, we establish long term existence and large time asymptotics of this flow.

2017-10-13abs ↗pdf ↗

Minimal hypersurfaces can't always be connected by mean curvature flow.

problem Existence of connecting mean curvature flows for minimal hypersurfaces.
method Minimal hypersurface analogue of gradient flow trajectories between critical points.
result Additional topological and variational obstructions to connecting mean curvature flows.

The paper solves a generalized Christoffel-Minkowski problem using a curvature flow.

problem Solving the (p,q)-Christoffel-Minkowski problem.
method Investigating the problem via an expanding curvature flow.
result Existence and uniqueness of smooth solutions to the (p,q)-Christoffel-Minkowski problem.

We show that on a smooth Hermitian minimal model of general type the Chern-Ricci flow converges to a closed positive current on M. Moreover, the flow converges smoothly to a Kahler-Einstein metric on compact sets away from the null locus of K_M. This generalizes work of Tsuji and Tian-Zhang to Hermitian manifolds, prov…

2013-06-29abs ↗pdf ↗

Ancient convex solutions to flow equations are limited to simple shapes.

problem Characterizing ancient convex solutions to flow equations.
method Analyzing mean curvature flow and curvature functions of convex hypersurfaces.
result Ancient convex solutions to flow equations are limited to spherical, cylindrical, or planar shapes.

Hyperbolic solitons on trans-Sasakian space forms and their submanifolds

problem Characterizing hyperbolic solitons on trans-Sasakian space forms and their submanifolds
method Introducing hyperbolic *-Ricci solitons and hyperbolic Ricci-Yamabe solitons
result Characterizing the nature of hyperbolic solitons on trans-Sasakian space forms and their submanifolds

Study shows how to preserve Lagrangian condition in mean curvature flow on Kim-McCann metrics.

problem Preserving Lagrangian condition in mean curvature flow on Kim-McCann metrics.
method Expressed mean curvature flow within generalized mean curvature flow framework.
result Lagrangian condition is preserved along the flow.

We present a simple connection between differential Harnack inequalities for hypersurface flows and natural concavity properties of their time-of-arrival functions. We prove these concavity properties directly for a large class of flows by applying a concavity maximum principle argument to the corresponding level set f…

2019-12-13abs ↗pdf ↗