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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.

168,742 papers · 148 categories

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54108162216 · May 202619922001200920172026
48 results for $\varepsilon$-harmonic maps

Paper proves energy identity and no-neck property for special harmonic maps.

problem Analyzing special harmonic maps with homogeneous targets.
method Introduced equivariant embedding for ε\varepsilon-harmonic case.
result Energy identity and no-neck property established for ε\varepsilon- and αα-harmonic maps.

The paper proves a Liouville theorem for specific harmonic maps with free boundary.

problem Analyzing harmonic maps with free boundary conditions.
method Developed Liouville theorem for φ φ-FF-symphonic, φ φ-FF-harmonic, and φ φ-ΦS,p,εΦ_{S, p, \varepsilon} harmonic maps.
result Established Liouville theorem for the specified harmonic maps with free boundary.

Study shows only rotations can be approximated by Ginzburg-Landau critical points.

problem Proving not all harmonic maps can be approximated by Ginzburg-Landau critical points.
method Rigidity theorem applied to Ginzburg-Landau energy critical points.
result Only rotations can be approximated by Ginzburg-Landau critical points.

The paper extends energy identities and neck existence for ε-harmonic maps.

problem Understanding the energy identity and neck formation for ε-harmonic maps.
method Finding analogues of energy identities and neck existence results for ε-harmonic maps.
result Specific quantities determine energy identity and neck formation for ε-harmonic maps.

αα-Dirac-harmonic maps are variations of Dirac-harmonic maps, analogous to αα-harmonic maps that were introduced by Sacks-Uhlenbeck to attack the existence problem for harmonic maps from surfaces. For α>1α>1, the latter are known to satisfy a Palais-Smale condtion, and so, the technique of Sacks-Uhlenbeck consists in …

2019-03-19abs ↗pdf ↗

This study recovers electromagnetic parameters on boundaries from impedance and admittance data.

problem Recovering anisotropic electromagnetic parameters from boundary impedance and admittance data.
method Formulated inverse boundary value problem for time-harmonic Maxwell's equations on differential 1-forms.
result Knowledge of impedance and admittance maps determines tangential entries of induced metrics at the boundary.

Proves theorem for Riemannian manifolds, extending previous work.

problem Proving Quantitative Fatou Theorem on Riemannian manifolds.
method Extending ε-approximation lemma to manifold setting.
result Proves Quantitative Fatou Theorem for Lipschitz domains on Riemannian manifolds.

Study of critical points in Ginzburg-Landau approximation with stability results.

problem Stability of critical points in Ginzburg-Landau approximation.
method Application of previous joint method with T. Rivière for upper semi-continuity of extended Morse index.
result Upper semi-continuity of extended Morse index for sequences of critical points.

The study classifies warped products with harmonic curvature on surfaces, showing two possibilities for the metric.

problem Classifying warped products with harmonic curvature on surfaces.
method Analyzing the properties of nonconstant warping functions and Gaussian curvature.
result Both possibilities of metrics are realized on closed orientable surfaces of genus greater than 1.

The paper studies Dirac operators and their solutions concentrating near singular sets.

problem Understanding concentration properties of solutions to Dirac equations.
method Analyzes Dirac operators of the form Dε=D+ε1AD_\varepsilon= D+\varepsilon^{-1}\mathcal A and their solutions.
result Solutions concentrate exponentially near the locus where the rank of ker(A)\ker(\mathcal A) jumps.

Paper proves Liouville theorems for harmonic functions under specific curvature bounds.

problem Analyzing harmonic functions on manifolds with lower bounds of NN-weighted Ricci curvature.
method Uses Moser's iteration procedure to prove Liouville theorems.
result Establishes Liouville theorems for harmonic functions with sublinear growth and under weaker bounds of NN-weighted Ricci curvature.

Let f ⁣:S1Gf\colon \mathbb{S}^1\rightarrow G be a surjective map from the standard unit circle to a graph GG such that the pre-image of each point has diameter less than ε\varepsilon. If ε\varepsilon is small enough, does ff split as a free factor in π1(G)π_1(G)?

2019-07-28abs ↗pdf ↗

We study the asymptotic Dirichlet problem for A\mathcal{A}-harmonic functions on a Cartan-Hadamard manifold whose radial sectional curvatures outside a compact set satisfy an upper bound K(P)1+εr(x)2logr(x) K(P)\le - \frac{1+\varepsilon}{r(x)^2 \log r(x)} and a pointwise pinching condition K(P)CKK(P) |K(P)|\le C_K |K(P')| for some const…

2015-10-06abs ↗pdf ↗

Algorithm finds real line mapping from points under ordinal constraints.

problem Finding a mapping from points to real line under ordinal constraints.
method Approximation algorithm for dense case in O(n7)+(1/ε)O(1/ε1/8)nO(n^7) + (1/\varepsilon)^{O(1/\varepsilon^{1/8})} n time.
result Computes a solution satisfying (1O(ε1/8))(1-O(\varepsilon^{1/8}))-fraction of all constraints.

Study heat flow for half-harmonic maps and harmonic maps with free boundary.

problem Integrability and regularity of half-harmonic maps and harmonic maps with free boundary.
method Introduced a heat flow associated to half-harmonic maps and constructed weak solutions via Ginzburg-Landau approximation.
result Proved partial regularity of weak solutions in space and time.

Study existence of harmonic and Dirac-harmonic maps from degenerating surfaces.

problem Existence of harmonic and Dirac-harmonic maps from degenerating surfaces.
method Using the Sacks and Uhlenbeck scheme, analyze a sequence of maps from degenerating surfaces to non-positive curved manifolds.
result Existence of limiting harmonic and Dirac-harmonic maps under certain conditions.

Both bi-harmonic map and ff-harmonic map have nice physical motivation and applications. In this paper, by combination of these two harmonic maps, we introduce and study ff-bi-harmonic maps as the critical points of the ff-bi-energy functional 12Mfτ(φ)2dvg\frac{1}{2}\int_M f|τ(φ)|^2dv_{g}. This class of maps generalizes both …

2013-05-23abs ↗pdf ↗

\infty-Harmonic maps are a generalization of \infty-harmonic functions. They can be viewed as the limiting cases of p-harmonic maps as p goes to infinity. In this paper, we give complete classifications of linear and quadratic \infty-harmonic maps from and into a sphere, quadratic \infty-harmonic maps between E…

2007-10-30abs ↗pdf ↗

The paper studies geometric properties of Φ(3)Φ_{(3)}-harmonic maps and proves Liouville type results.

problem Exploring geometric properties of Φ(3)Φ_{(3)}-harmonic maps.
method Unified geometric analytic methods, first and second variation formulas, stress-energy tensor, conservation law, monotonicity formula, asymptotic assumption, extrinsic average variational method.
result Proves Liouville type results for Φ(3)Φ_{(3)}-harmonic maps.

The paper examines stability of harmonic maps on specific manifolds.

problem Stability of harmonic maps on compact convex hypersurfaces.
method Analyzes stability conditions for ΦS,F,H Φ_{S, F,H} and ΦT,F,H Φ_{T,F,H} harmonic maps.
result Provides theorems to determine stability of ΦS,F,H Φ_{S, F,H} and ΦT,F,H Φ_{T,F,H} harmonic maps.

The paper examines stability of subelliptic harmonic maps with potential.

problem Stability of subelliptic harmonic maps with potential.
method Derived first and second variation formulas, proved stability conditions, and gave instability results.
result Subelliptic harmonic maps with potential are stable under certain curvature and potential conditions.

Constructs new connections with finite energy in 4D, preserving gauge equivalence and curvature properties.

problem Constructing connections with finite energy in 4D with specific curvature properties.
method Similar to Brezis-Coron's method for harmonic maps, gluing technique.
result New connections with finite energy and specific curvature properties can be constructed.

The paper studies maps from pseudo-Hermitian to Kähler manifolds, proving harmonic map properties.

problem Analyzing maps between pseudo-Hermitian and Kähler manifolds.
method Investigates partial energy functionals and critical maps, proving foliated results for b\overline{\partial}_{b}- and b\partial_{b}-harmonic maps.
result Generalizes Siu's holomorphicity result to b\overline{\partial}_{b}- and b\partial_{b}-harmonic maps.

We propose a new notion called \emph{infinity-harmonic maps}between Riemannain manifolds. These are natural generalizations of the well known notion of infinity harmonic functions and are also the limiting case of pp% -harmonic maps as pp\to \infty . Infinity harmoncity appears in many familiar contexts. For example,…

2008-10-06abs ↗pdf ↗

The paper explores unique continuation properties for polyharmonic maps between Riemannian manifolds.

problem Investigating unique continuation principles for polyharmonic maps.
method Analyzing critical points of higher order functionals to prove extensions of known results in harmonic and biharmonic cases.
result Proving extensions of unique continuation principles for k-harmonic maps.

The paper proves a Liouville theorem for a specific type of harmonic maps on foliated manifolds.

problem Investigating harmonic maps on foliated Riemannian manifolds.
method First variational formulas, generalized Weitzenböck type formula, and Liouville type theorem for (F,F)p(\mathcal F,\mathcal F')_{p}-harmonic maps.
result Established a Liouville type theorem for (F,F)p(\mathcal F,\mathcal F')_{p}-harmonic maps.