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退化有限伸张映射
Degenerate Mappings of Finite Distortion
【作者】 任素娜;
【导师】 高红亚;
【作者基本信息】 河北大学 , 基础数学, 2007, 硕士
【摘要】 有限伸张映射包含着Jf>0 a.e.Ω和Jf=0α.e.Ω(退化情况)这两种情形.本文在n维欧氏空间中刻画了一类退化的有限伸张映射,其n×n阶Jacobi矩阵的秩为l:1≤l<n,并且分别在Sobolev空间W1,l(Ω,Rn),W1,l)(Ω,Rn)和Orlicz空间Wl,P(Ω,Rn)中讨论了这类退化有限伸张映射的弱单调性;令K(χ)≥1是定义在区域Ω(?)Rn,n≥2上的可测函数,其满足exp(βK(χ))∈Lloc1(Ω),β>0,我们研究了当伸张函数K(χ)指数次可积时,退化有限伸张映射是连续的, L1logαL-可积的;最后,我们讨论了有界退化有限伸张映射的可去奇异性.
【Abstract】 Mappings of finite distortion include two conditions:one is Jf>0α.e.Ω, the other is Jf=0α.e.Ω, (the situation of degeneration). This paper we denote by Df(x) the Jacobian matrics, and the rank of n×n-matric Df(x) is l:1≤l<n. Then, we discuss the monotonicity of degenerate mappings of finite distortion in Sobolev space W1,l(Ω,Rn),W1,l)(Ω,Rn) and Orlicz space W1,P(Ω,Rn), respectly. Let K(x)≥1 be a measurable function defined on a domainΩ(?)Rn, n≥2, and such that exp(βK(x))∈Lloc1(Ω),β>0, we prove the continuity and regularity of degenerate mappings with exponentially integrable finite distortion. Finally, we study the question of removable singularities for bounded degenerate mappings of finite distortion.
【Key words】 degenerate mappings of finite distortion; monotonicity; continuity; L~1 log~αL-integrability; removable singularity;