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Rotenberg模型中迁移半群的本质谱
引用本文:吴红星,马江山.Rotenberg模型中迁移半群的本质谱[J].应用泛函分析学报,2014(4):315-321.
作者姓名:吴红星  马江山
作者单位:上饶师范学院,上饶334001
基金项目:国家自然科学基金(11461055)
摘    要:在Lp(1(≤)p<+∞)空间中,本文运用半群理论研究了Rotenberg模型中具光滑边界条件的迁移半群的本质谱.采用半群方法和比较算子等方法,证明了对任意的t>0,s>0,算子UH(t)-U0(t)]U0(s)UH(t)-U0(t)]在Lp(1<p<+∞)在空间中紧和在L1空间弱紧,得到迁移半群VH(t)与V0(t)有相同的本质谱型.

关 键 词:Rotenberg模型  迁移半群  紧性  本质谱型

The Essential Spectrum of Transport Semigroup in Retenberg Model
WU Hongxing,MA Jiangshan.The Essential Spectrum of Transport Semigroup in Retenberg Model[J].Acta Analysis Functionalis Applicata,2014(4):315-321.
Authors:WU Hongxing  MA Jiangshan
Institution:(Shangrao Normal University, Shangrao 334001, China)
Abstract:The objective of this paper is to discuss the essential spectrum of transport semigroup with smooth boundary conditions in Retenberg model in Lp(1 ≤ p 〈 +∞) space. It is to prove that the operator UH(t) - U0(t)]U0(s)UH(t) - U0(t)] is compact in Lp(1 〈 p 〈 +∞) space and is weakly compact in L1 space, and it is to obtain that the transport semigroup VH(t) and V0(t) have the same essential spectrum type. The paper relies on theory of semigroups of linear operators, and the main method relies on semigroups and comparison operators.
Keywords:Rotenberg model  transport semigroup  compactness  essential spectrum type
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