### Abstract

We study the limiting behavior as ε ↘ 0 of solutions u _{ε} to the Dirichlet problem ε^{2} δu _{ε} - u_{ε} = 0 on Ω, u∂Ω = e ^{-θ/ε}. where ̄Ω is a bounded domain and θ a given smooth function on its boundary ∂Ω. We provide a natural criterion on θ in order to obtain an estimate ε_{v}u _{ε}(x)/u_{ε}(x) |≤C≤∞, x ∈ ∂ Ω, independent of ε as ε 0, where ∂_{v}u _{ε} denotes the normal derivative of u_{ε}. The results of this paper serve to significantly strengthen the analysis of asymptotic minimizers for a Ginzburg-Landau variational problem for irrotational vector fields (gradient vector fields) known as the regularized Cross-Newell variational problem in the pattern formation literature. In particular, this yields estimates on the asymptotic energy of these minimizers for general Dirichlet viscosity boundary conditions. The class of boundary conditions for this variational problem to which our methods apply is quite general (even including ' domains which are general Riemannian manifolds with boundary). This, for instance, provides a first step for extending the Ginzburg-Landau type model we consider to the larger class of vector fields that are locally gradient (often called director fields).

Original language | English (US) |
---|---|

Pages (from-to) | 205-223 |

Number of pages | 19 |

Journal | Physica D: Nonlinear Phenomena |

Volume | 196 |

Issue number | 3-4 |

DOIs | |

State | Published - Sep 15 2004 |

### Fingerprint

### Keywords

- Dirichlet-to-Neumann map
- Pattern formation
- Phase-diffusion equation
- Viscosity solutions

### ASJC Scopus subject areas

- Applied Mathematics
- Statistical and Nonlinear Physics

### Cite this

**The dirichlet-to-neumann map, viscosity solutions to eikonal equations, and the self-dual equations of pattern formation.** / Ercolani, Nicholas M; Taylor, Michael.

Research output: Contribution to journal › Article

*Physica D: Nonlinear Phenomena*, vol. 196, no. 3-4, pp. 205-223. https://doi.org/10.1016/j.physd.2004.06.014

}

TY - JOUR

T1 - The dirichlet-to-neumann map, viscosity solutions to eikonal equations, and the self-dual equations of pattern formation

AU - Ercolani, Nicholas M

AU - Taylor, Michael

PY - 2004/9/15

Y1 - 2004/9/15

N2 - We study the limiting behavior as ε ↘ 0 of solutions u ε to the Dirichlet problem ε2 δu ε - uε = 0 on Ω, u∂Ω = e -θ/ε. where ̄Ω is a bounded domain and θ a given smooth function on its boundary ∂Ω. We provide a natural criterion on θ in order to obtain an estimate εvu ε(x)/uε(x) |≤C≤∞, x ∈ ∂ Ω, independent of ε as ε 0, where ∂vu ε denotes the normal derivative of uε. The results of this paper serve to significantly strengthen the analysis of asymptotic minimizers for a Ginzburg-Landau variational problem for irrotational vector fields (gradient vector fields) known as the regularized Cross-Newell variational problem in the pattern formation literature. In particular, this yields estimates on the asymptotic energy of these minimizers for general Dirichlet viscosity boundary conditions. The class of boundary conditions for this variational problem to which our methods apply is quite general (even including ' domains which are general Riemannian manifolds with boundary). This, for instance, provides a first step for extending the Ginzburg-Landau type model we consider to the larger class of vector fields that are locally gradient (often called director fields).

AB - We study the limiting behavior as ε ↘ 0 of solutions u ε to the Dirichlet problem ε2 δu ε - uε = 0 on Ω, u∂Ω = e -θ/ε. where ̄Ω is a bounded domain and θ a given smooth function on its boundary ∂Ω. We provide a natural criterion on θ in order to obtain an estimate εvu ε(x)/uε(x) |≤C≤∞, x ∈ ∂ Ω, independent of ε as ε 0, where ∂vu ε denotes the normal derivative of uε. The results of this paper serve to significantly strengthen the analysis of asymptotic minimizers for a Ginzburg-Landau variational problem for irrotational vector fields (gradient vector fields) known as the regularized Cross-Newell variational problem in the pattern formation literature. In particular, this yields estimates on the asymptotic energy of these minimizers for general Dirichlet viscosity boundary conditions. The class of boundary conditions for this variational problem to which our methods apply is quite general (even including ' domains which are general Riemannian manifolds with boundary). This, for instance, provides a first step for extending the Ginzburg-Landau type model we consider to the larger class of vector fields that are locally gradient (often called director fields).

KW - Dirichlet-to-Neumann map

KW - Pattern formation

KW - Phase-diffusion equation

KW - Viscosity solutions

UR - http://www.scopus.com/inward/record.url?scp=4344692162&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4344692162&partnerID=8YFLogxK

U2 - 10.1016/j.physd.2004.06.014

DO - 10.1016/j.physd.2004.06.014

M3 - Article

AN - SCOPUS:4344692162

VL - 196

SP - 205

EP - 223

JO - Physica D: Nonlinear Phenomena

JF - Physica D: Nonlinear Phenomena

SN - 0167-2789

IS - 3-4

ER -