Compactness and Sharp Lower Bound for a 2D Smectics Model

Compactness and Sharp Lower Bound for a 2D Smectics Model
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二维近晶模型的紧致性和尖锐下界

DOI:
10.1007/s00332-021-09717-1
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发表时间:
2021
影响因子:
3
通讯作者:
Yan, Xiaodong
Yan, Xiaodong
中科院分区:
数学2区
文献类型:
--
作者:
Novack, Michael;Yan, Xiaodong

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We consider a 2D smectics model \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} E_{\epsilon }\left( u\right) =\frac{1}{2}\int _\varOmega \frac{1}{\varepsilon }\left( u_{z}-\frac{1 }{2}u_{x}^{2}\right) ^{2}+\varepsilon \left( u_{xx}\right) ^{2}\mathrm{d}x\,\mathrm{d}z. \end{aligned}$$\end{document}Forand a sequence \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left\{ u_{n}\right\} $$\end{document} with bounded energies \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$E_{\varepsilon _{n}}\left( u_{n}\right) $$\end{document}, we prove compactness ofinandinfor anyunder the additional assumptionfor some. We also prove a sharp lower bound onwhenThe sharp bound corresponds to the energy of a 1D ansatz in the transition region.
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