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N=2超对称Yang-Mills有限理论半单纯群su(n)×su(m)的所有可能表示

Recently a Iot o£attentions have been paid to the finite N=2 supersymmetrictheo“es.It has been proved that when the charge renormalization p function vanishesat ane loop,N=2 supersymmetricfunction at one loop requires[。] C:(G)=∑T(Ri) iYang—Mills theories is finite[”.Vanishing of p(])Whefe C,(G)i8 the value of the quadratic Casimir operator for the adjoint representationof G and T(Ri)is the Dynkin inde:x of the repres...  (本文共3页) 阅读全文>>

《杭州师范学院学报(自然科学版)》1988年06期
杭州师范学院学报(自然科学版)

子流形上Yang—Mills场的稳定性和孤立性现象

§] 准备知识在稳平一礴设M是一个紧致定向的黎曼流形,P是M上主G一丛,G是一个具有李代数g的紧致李群。选取G在向量空问E上的一个u表示p,便决定伴随向量丛E:P x E。设V是具有曲率Rv的P上一个联络。Ⅳ可以视为取值于子李代数的伴随丛gE竺p×g中的M上2一形式。 对于P上联络V我们构造Yang—Mills泛函 ’口 YM(V)。寺、k li R V】I。在点x∈M,R。的模长由公式 Il R。忆=∑i R。。i,ej l= ’ ;一}trace(AoB), ·A,B∈S(Ex)。如果P上的一个联络V是在’芝分分折意义下Yang—Mills泛函的一个临界点,贝0V称为Yang—Mills联络,其曲率称为Yang~Mills场。我们知道R。是Yang—Mills场当且仅当6\R。=0,其中6。魁微分算予d’伴随算予。从Bianchi恒等式d。R’=0易见R。是Yang—Mill s场当H仅当R。是丛八。0gE的一个调和截面,H...  (本文共7页) 阅读全文>>

《自然杂志》1988年02期
自然杂志

广义Noether 恒等式和杨-Mills 场

叫...............一 N一1人。=习fl尝F‘扭,9,‘。)(S苍一功先C‘。)·(6)物质场和杨一Mills场藕合的规范不变拉氏量‘一音F:·厂::,一帝,·(9一l’gTa,:,功,‘,,在费米场的局域手征变换 访,必十i。(x)凡功,诱、毋十而凡。(x)(8)拉氏量的变更为6L~一i。(x)9刃三(北-毛一此练 重质量杨一MUIs理论,一般是非规范不变钓,物质场和规范场棍合的规范不变拉氏量在费米场的局域手征变换下也是变更的,因此需研究非不变性系统的变换性质.拉氏量在无限连续群下的非不变性导致广义Noe七her恒等式山.这里讨论普遍情形,设系统的拉氏量L含场量的高阶微商〔2’,在无穷小变换 x,‘=x,+R‘,。‘,功a‘~动a+S万s‘(l)下,设拉氏量的变更为 6L=U‘s‘,U‘=u苦(扭)9,(。),(2)其中。‘(x)为任意函数,“苦‘勿,为x,访犷功九。。)的函数,凡,、St为线性微分算子.在变换(...  (本文共1页) 阅读全文>>

《China City Planning Review》2014年01期
China City Planning Review

Muth-Mills Model of Urban Spatial Structure:Theory and Implications for Cities in China

1.IntroductionIn the United States a strong sentiment against a phenomenonknown as urban sprawl has developed and many local gov-ernments have adopted policies designed to deal with sprawl(Brueckner,2000).With the growing spatial sizes of cities(DING,2009)urban sprawl is now even found in Chinese cit-ies and it is characterized by scattered and poorly planned low-density developments beyond the edge of urbanized area...  (本文共8页) 阅读全文>>

《International Journal of Plant Engineering and Management》2002年03期
International Journal of Plant Engineering and Management

Application of Ferrography to Fault Diagnosis of Hydraulic Systems

1 IntroductionOilanalysishasbeenappliedformanydecadesasapreventivemaintenanceconceptutilizedtopre dictimpendingmechanicalfailurethroughexaminationofusedoilsamples.Theoilanalysiscon ceptisbasedonthepremisethatallmechanicalsystemsexperiencetheprocessofwearduringop eration .Thiswearprocessresultsintheproductionofweardebrisorwearparticleswhicharein dicativeoftherespectivewearsurfacecondition .Inthecaseoflubricatedsystems...  (本文共4页) 阅读全文>>

《Journal of China University of Mining & Technology》2002年02期
Journal of China University of Mining & Technology

Calculation Method for Media in Ball Mills by Layers

biggertheradiusris,thehigherthereverserateΨis,andsoisγ .Fig .2 DeflectionofmediainmillDuringtheendofthefirstphase ,medialocateatA point (Fig .3 ) .Bytheactionoftheinertia,mediacontinuetoglideupwards,deflectionanglecontinuestoenlarge .Thisbelongtothesecondphase .Additionaldeflectionangleτandangularve locityωBcanbecalculatedbymathematicalmethod .Thetotaldeflectionangleβisthesumofdeflectionangleγandglidingdeflectionangl...  (本文共5页) 阅读全文>>