显然,a不是厄米算符,a≠a。但ata是厄米算符,(ata)=a'a。 问题:aa是什么力学量? [a=0,∴与i共同本征态,只要求解了首的本征方程,就求解了 的本征方程

1.设A是n阶矩阵,且经过 Gauss消去法一步消去后变为an (0A2 证明: (1)如果A是实对称矩阵,那么A2也是对称的; (2)如果ala(i=1,2,L,n),称A为(按行)严格对角占优矩阵,那么A2也是严格对角 占优

Microorganisms are the most diversified and interesting to study. Microbiology is one of the most active and promising field in life sciences. I will try to integrate the most classical and basic ideas theories and concepts with the most recent advances in microbiology, which are so exciting and full of fun to know about

一、i囊蚴( encysted metacercaria) 二、感染期( infective stage,感染阶段) 指寄生虫能使人感染的阶段在鱼肉中的

字符串是ASCI字符的集合。如同其他语言一样, LabVIEW 也提供了各种处理字符串的功能,如果想获得字符串的例 子,可查看 Examples General strings.llb下面扼要介绍 些内容。 创建字符串控制对象和显示对象可以在 ControlsString & Table中看到右边所显示字符串控制对象和显示对象

I Classification of Rearrangement Reactions() II Nucleophilic rearrangement() 1 Wagner-Meerwein rearrangement( 2 Pinacolic Rearrangement 3 a-ethandione Rearrangement 4 Beckmann Rearrangement 5 Baeyer-Villiger Rearrangement

What is ECoN and who am I? think-tank- in Scandinavia with100 employees Owned and run by employees Economics and other social science on problems of current interest

Text I Christmas What do you know about Christmas? Christmas Christmas tree Christmas card Christmas books Nicholas SAINT

Teaching Outline Pre -reading- Questions Famous Quotations of Study Passage Analysis A spelling word derivation language points useful expression

Questions on the text Did people have to attend on machines hundreds of years ago? What happened to industry about a hundred years ago? What is the operation of automatic machines based on?