微分算子的自伴扩张及对称扩张问题.pdf

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17、ointExtensionofDifferentialOperatorsAbstractLinearHamiltonianoperator,asitswidespreaduseincommonlife,hasbecomeoneofthemostimportantdifferentialoperators,whiletheFriedrichsextensionisalsothemostimportantpartofresearches.Friedrichsextension,whosenameafterFriedrichs,

18、isanspecialadjointextension.Thatistosay,forasemi-boundeddenselydefinedoperator,thereexistsaself-adjointextensionwhichhasthesamebound.Withtheappearanceofcomplexdifferent