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- W2963507923 abstract "We study a model for lipid bilayer membrane vesicles exhibiting phase separation, incorporating a phase field together with membrane fluidity and bending elasticity. We prove the existence of a plethora of equilibria in the large, corresponding to symmetry-breaking solutions of the Euler--Lagrange equations, via global bifurcation from the spherical state. To the best of our knowledge, this constitutes the first rigorous existence results for this class of problems. We overcome several difficulties in carrying this out. Due to inherent surface fluidity combined with finite curvature elasticity, neither the Eulerian (spatial) nor the Lagrangian (material) description of the model lends itself well to analysis. This is resolved via a singularity-free radial-map description, which effectively eliminates the grossly underdetermined midplane deformation. The resulting governing equations comprise a quasi-linear elliptic system with nonlinear constraints. We show the equivalence of the problem to that of finding the zeros of a compact vector field. The latter is not routine. Using spectral and a priori estimates together with Fredholm properties, we demonstrate that the principal part of the quasi-linear mapping defines an operator with compact resolvent. We then combine well-known group-theoretic ideas for symmetry breaking with global bifurcation theory to obtain our results." @default.
- W2963507923 created "2019-07-30" @default.
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- W2963507923 date "2017-01-01" @default.
- W2963507923 modified "2023-10-12" @default.
- W2963507923 title "Symmetry-Breaking Global Bifurcation in a Surface Continuum Phase-Field Model for Lipid Bilayer Vesicles" @default.
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- W2963507923 doi "https://doi.org/10.1137/15m1043716" @default.
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