Recent content by princeton118

Thank you all above.

Can someone recommend a textbook about differential equations? I am going to study it by myself, so I need a good textbook! Thanks!

Could someone recommend a good textbook on methods of mathematical physics? Thanks!

What role does the Lorentz Group play in the General Relativity ?

Does the \langle \phi \rangle means \langle0|\phi|0\rangle? What does |\phi| exactly mean?

What is the rotation transformation generator? What is the Lorentz group generator?

Is Lorentz transformation one kind of coordinate transformation? If so, the conservation of inner product, which is the primary property of Lorentz Transformation, is trivial, isn't it? The vector transforms in some way, the metric transforms in the inverse way, so the inner product defintely...

How to calculate a matrix's exponential? e.g exp(-iaL), where L is a 4*4 matrix (like a group generator )

Thanks a lot!

What is the meaning of "spurion"? How can it break the symmetry? Which book give some good explanations about this theory? Thanks!

I see thanks!

Someone can recommend some good mathematics dictionary or handbook which is comprehensive, completeness and which states the mathematical notions clearly. Thanks!

But in the Generalized Linear Group the second term in the parentheses is the Field. But here what does the "4" mean?

What does this expression, SU(2,4), mean?

I am reading Frankel's book. But it is the first edition. Is the change between the first edition and the second edition very big and significant?