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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.

168,932 papers · 148 categories

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48 results for critical equations

Study critical quasilinear equations on Riemannian manifolds with curvature constraints.

problem Investigate critical quasilinear elliptic equations on Riemannian manifolds with nonnegative Ricci curvature.
method Utilize a new nonlinear Kato inequality and Cheng-Yau type gradient estimates for positive solutions.
result Classify positive solutions to the critical pp-Laplace equation and show rigidity concerning the ambient manifold.

Solves Dirichlet problem for Lagrangian phase equation with critical and supercritical phase.

problem Solving Dirichlet problem for Lagrangian phase equation with critical and supercritical phase.
method Uses interior C2C^2 estimate.
result Result is sharp, showing existence of singular solutions in subcritical phase.

Estimates for special Lagrangian curvature equations in critical and convex cases.

problem Interior estimates for special Lagrangian curvature equations.
method Establishes a priori interior curvature and gradient estimates.
result Proves interior curvature and gradient estimates for special Lagrangian curvature equations.

Paper proves gradient estimates for Lagrangian mean curvature equation.

problem Proving gradient estimates for Lagrangian mean curvature equation.
method Interior gradient estimates for critical and supercritical Lagrangian mean curvature equation.
result Solves Dirichlet boundary value problem for critical and supercritical Lagrangian mean curvature equation.

We prove sharp pointwise decay estimates for critical Dirac equations on Rn\mathbb{R}^n with n2n\geq 2. They appear for instance in the study of critical Dirac equations on compact spin manifolds, describing blow-up profiles, and as effective equations in honeycomb structures. For the latter case, we find excited state…

2018-09-05abs ↗pdf ↗

The paper examines critical points of solutions to a surface equation in 3D spacelike spaces.

problem Analyzing critical points of solutions to the HR=HLH_R=H_L surface equation.
method Geometrical conditions, uniqueness results, and bounds for inradius.
result Improved bounds for inradius of domains of solutions to the HR=HLH_R=H_L surface equation.

Characterizes solutions to Z-critical equations on surfaces using effective conditions.

problem Characterizing solutions to Z-critical equations on compact Kähler surfaces.
method Uses effective conditions and Picard number bounds to characterize solutions.
result Characterizes optimally destabilizing curves for Donaldson's J-equation and deformed Hermitian Yang-Mills equation.

Paper studies critical points of curvature energies in 4D.

problem Critical points of conformally invariant extrinsic energies on 4-manifolds.
method Converted Euler-Lagrange equations to a system with favourable structures using invariances and Noether's theorem.
result Generalized Tristan Rivière's work on Willmore energy to 4D.

Deep learning model solves high-dimensional PDEs using Actor-Critic approach.

problem Solving high-dimensional nonlinear PDEs efficiently.
method Reformulated PDE into BSDE system, inspired by Actor-Critic algorithm for deep RL.
result Improved model with fewer parameters, faster convergence, and less hyperparameter tuning.

We introduce ZZ-critical connections for holomorphic vector bundles and prove their existence under stability conditions.

problem Existence of ZZ-critical connections for holomorphic vector bundles.
method Associated geometric PDEs to Bridgeland stability conditions and used infinite dimensional moment maps.
result In the large volume limit, a sufficiently smooth holomorphic vector bundle admits a ZZ-critical connection if and only if it is asymptotically ZZ-stable.

Paper proves conjecture about Einstein metrics on manifolds with positive isotropic curvature.

problem Proving the Besse conjecture for metrics with positive isotropic curvature.
method Analyzing the critical point equation and using properties of metrics with positive isotropic curvature.
result The Besse conjecture is true for metrics with positive isotropic curvature.

The paper studies critical metrics on a specific type of manifold.

problem Investigating critical metrics on almost Kenmotsu manifolds.
method Introducing and studying the \ast-Miao-Tam critical equation on (2n+1)(2n + 1)-dimensional (k,μ)(k,μ)'-almost Kenmotsu manifolds.
result If a (2n+1)(2n + 1)-dimensional (k,μ)(k,μ)'-almost Kenmotsu manifold satisfies the \ast-Miao-Tam critical equation, it is \ast-Ricci flat and locally isometric to a specific product of manifolds.

On a Riemannian compact manifold, we give existence and multiplicity results for solutions of elliptic PDE by introducing isometry invariances. When the groups we used have finite orbits, we get multiplicity results for equations with the classical critical Sobolev exponent, for instance the Yamabe equation. When there…

2008-04-07abs ↗pdf ↗

Proves stability of certain vector bundles on Kähler surfaces.

problem Stability of rank 2 holomorphic vector bundles on Kähler surfaces.
method Proves existence of ZZ-positive and ZZ-critical metrics leading to bundle stability.
result Proves stability results for deformed Hermitian Yang-Mills and almost Hermite-Einstein equations for rank 2 bundles.

A large class of semi-Hamiltonian systems of hydrodynamic type is interpreted as the equations governing families of critical points of functions obeying the classical linear Darboux equations for conjugate nets.The distinguished role of the Euler-Poisson-Darboux equations and associated Lauricella-type functions is em…

2014-11-21abs ↗pdf ↗

Actor-critic algorithms converge to an ODE as data samples change dynamically.

problem Challenging to mathematically analyze due to non-i.i.d. data samples.
method Proved convergence to an ODE using time rescaling and geometric ergodicity.
result Convergence to the ODE limit and its properties proven.

Rigidity theorem for critical points of Allen-Cahn equation on S³.

problem Rigidity of critical points with low Morse index on S³.
method Analysis of nullity and symmetries of critical points, Frankel-type theorem for nodal sets.
result Critical points with index five are symmetric and vanish on a Clifford torus, realizing the fifth width of the min-max spectrum.

Study semilinear equations on weighted manifolds to prove rigidity.

problem Prove rigidity of weighted manifolds via classification of semilinear equations.
method Classify positive solutions at the Sobolev-critical exponent, proving rigidity and weight triviality.
result Existence of positive solutions implies rigidity and weight triviality under certain curvature conditions.

Neural networks trained with actor-critic algorithms converge to ODEs under weak convergence analysis.

problem Challenges in convergence analysis due to changing data distributions in online learning.
method Geometric ergodicity of data samples, Poisson equation, weak convergence techniques.
result Actor and critic networks converge to solutions of ODEs with random initial conditions.

The paper finds sign-changing solutions for a specific type of elliptic equation.

problem Existence of sign-changing solutions for a Yamabe type equation.
method Investigates a critical elliptic equation with a Yamabe type operator on a compact manifold with boundary.
result Existence of sign-changing solutions assured under certain geometric conditions.

The paper classifies solutions to a specific elliptic equation in the Heisenberg group.

problem Classifying positive solutions to a critical semilinear elliptic equation in the Heisenberg group.
method Proof based on Jerison-Lee's differential identity and pointwise/integral estimates.
result The solutions are the Jerison-Lee's bubbles in the Heisenberg group.

Study examines wave equation decay and Strichartz estimates on conic manifolds.

problem Analyzing wave equation behavior on conic spaces with critical electromagnetic potentials.
method Established decay and Strichartz estimates through localized spectral measure construction.
result Extended and improved previous results on wave equation behavior with critical potentials.

Neural networks solve high-dimensional HJB PDEs with asymptotic guarantees.

problem Solving high-dimensional Hamilton-Jacobi-Bellman PDEs in stochastic control theory.
method Actor-critic machine learning algorithm with a structured critic and biased gradient actor.
result The training dynamics converge to an ODE, ensuring solutions to the original problem.

Paper finds infinitely many solutions changing sign for critical fractional equations.

problem Critical fractional equations with sign-changing solutions.
method Reduction to equivalent problem on sphere, blow-up arguments, Pohozaev's identity, regularity results, symmetries of sphere.
result Unbounded sequence of sign-changing solutions for critical problems.

Study on Monge-Ampère equations with polynomial growth rates.

problem Analyzing solutions to Monge-Ampère equations with polynomial right-hand sides.
method Utilizing polynomial growth analysis to study regularity and growth rates of solutions.
result Translators for sub-affine-critical curvature flows are smooth and convex with specific growth rates.

In this paper we derive the Euler-Lagrange equation of the functional Lβ=Σ1cosβαdμ,  β1L_β=\int_Σ\frac{1}{\cos^βα}dμ, ~~β\neq -1 in the class of symplectic surfaces. It is cos3αH=β(J(Jcosα))\cos^3α{\bf{H}}=β(J(J\nabla\cosα)^\top)^\bot, which is an elliptic equation when β0β\geq 0. We call such a surface a ββ-symplectic critical surface. We first st…

2015-04-16abs ↗pdf ↗

The paper studies the smoothness of critical points of variational integrals on Hessian spaces.

problem The study focuses on the regularity of critical points of variational integrals defined on Hessian spaces.
method The approach involves solving a fourth order nonlinear equation and analyzing the Hessian of the critical points.
result Smooth critical points with bounded Hessian are shown to be smooth provided their Hessian has small BMO.

Study finds multiple solutions for Gross-Pitaevskii equations on curved spaces.

problem Finding multiple solutions for Gross-Pitaevskii equations on Riemannian manifolds.
method Critical point theory and Γ-convergence for Ginzburg-Landau functionals, plus new isoperimetric results.
result Lower bounds on the multiplicity of solutions in terms of the topology of the velocity set.

The paper classifies solutions to semilinear equations on curved spaces.

problem Classifying solutions to semilinear equations on manifolds with nonnegative Ricci curvature.
method Proving classification results for subcritical and critical semilinear elliptic equations.
result Strong rigidity results for nontrivial solutions in the critical case.

Study on a pinning model with random walk increments, showing convergence to a critical disordered pinning measure.

problem Understanding the critical behavior of a disordered pinning model.
method Analyzing a disordered pinning model induced by a random walk with specific moment conditions, showing convergence to a limiting measure.
result Convergence of point-to-point partition functions to the critical disordered pinning measure in the critical window.

Develops new strategy for Hessian estimates in Lagrangian mean curvature equation.

problem Interior Hessian estimates for solutions with prescribed Lipschitz phases.
method Allard-type regularity theorem, geometric measure theory, geometry of Lagrangian graphs, De Giorgi-Nash-Moser iteration.
result Sharp interior Hessian estimates for solutions with critical and supercritical phases.