Recent content by Abolaban

Hello Big Minds, In the following analysis...It is said that D_2 contains three subgroups Z_2...why did he choose a mathematical constuction contains only two of the the three subgroups? shouldn't he use the three in his construction? what will happen if he used the three? [from the book of...

Thanks "jedishrfu" for ur reply, do you mean that equations 2.66 depend implicitly on dimensions?

Hello Big Minds, I am reading through Math Methods for Physicists by Arfken and Weber 6th ed --Tensor Analysis. ----------------------------------------------------------------------------------------------------------------------------------------------------------- Note1: In page 133, in...

that was from Arfken's book 6th ed

thank you "Orodruin" for your answer... I have the sixth ed... Is that defenition of Arfken Contravariant vector -and hence tensor- consistent with the following definition: http://www.encyclopediaofmath.org/index.php/Contravariant_tensor best regardsAbolaban

ok...now it is clear...thank you "ChrisVer"

yeah...you are correct...it is the same...however using sub and super scripts while dealing with McMahon's notation is sometimes confusing...

thanks for your replies... yeah...you use this from vector analysis...dealing with tensors carry special flavours...so the tast might sometimes mix in one's tongue. --equation 2.130b seems to carry different flavour...namely by Christoffel

Hello Big minds, In the book of Arfken [Math Meth for Physicists] p 134 he defined contravariant tensor...my question is about a_ij he defined them first as cosines of an angle of basis then he suddenly replaced them by differential notation...why is that? cosines are not mention in this...

"Orodruin" thanks for your further clarification... I went through "Tensor analysis" in Math Meth for Physicists by Arfken and Weber pages 133 and beyond but I could not recognize how did you split that term into summation!?

thanks "Oroduin" for your comment... I have the following books, however, it is hard to recognize which could match the QFT tensor analysis...what do you recommend among them? -Daniel Fleisch: A Student's Guide to Vectors and Tensors -Derek F.Lawden: An Introduction to Tensor Calcul...

Thank you "Orodruin" for your answer... where can one correctly learn about the usuage of such notations?

Hello, I have encountered an equation in page 33 in the book of D.MacMahon titled QFT demystefied. It is the third equation from the top...how did the sum appear as a middle step of the equation? best regards. Abolaban