Recent content by shereen1

Dear All I am trying to derive the equations of the attached paper ( In homogeneous dark energy). I am wondering why did he split the second term as 2 terms in equation 8. I just write it as the first term!

sure i will. Thank you

Mathematical Physics, Mainly Those related to Gravity. And you?

Hi I am a phd student i am taking an astrophysics course we are using a book for Hansen and Also a book for Dina Prialink

Dear All I have a project related to the early universe and general relativity. Can anyone suggest me a book to start with? Thank you

Dear All It is known that pontryagin densities are defined in even dimension space, let's say i am concerned with 4 dim space time. We also have a certain group G. What is the formula of pontryagin densities for arbitrary group? Larger group?

Ther is also a book for John David Brown. It is interesting too.

I will download it to, i also find the book of Steven Carlip interesting too! Thank you for your time.

Thank you haushofer i will download the book and have a look on it.

Dear all can anyone help me to understand why gravity in 3 dim doesn't have local degree of freedom. How can i compute the degree of freedoms for gravity in and dimension D. If i consider massless gravity in 3d is the graviton propagating

Hi again no i mean in 1+2 space yes i know that the dual of a k vector is N-k. But am applying it to N= 2+1 space, i am wondering if the dual of the field strength which is a 1 form is the same as the gauge field since both are 1 form in this special 1+2 space. Thank you again

Dear all I have a question is the dual of the field strength ( of abelian gauge theory) in 3 dimensional space the same as the gauge field? I have a formula for the dual field strength and am trying to bring that of gauge field! Thank you

Dear All I am studying Chern Simons theory. Is the non abelian Chern Simons theory the same as topologically massive yang mills theory? Thank yoou

Dear all I am studying Chern simons Theory. If you please can anyone suggest me a book as introduction to Chern Simons theory ( also Chern Simon theory of garuge theories). In fact i will start by a paper of Witten (Quantum Field Theory and the Jones Polynomial)

no i mean gauging conformal group and studying the resulting action if invariant under diffeomorphism group. Do you have any idea about a refernce that could help me in proving this? Thank you