Recent content by Fisica

Homework Statement I need to calculate \square A_\mu + R_{\mu \nu} A^\nu if \square = \nabla_\alpha \nabla^\alpha , and is the covariant derivate SEE THIS PDF arXiv:0807.2528v1 i want to get the equation (5) from (3) Homework Equations A^{i}_{{;}{\alpha}} =...

I must get the yellow (3) from yellow in (2)

This is the problem

Homework Statement I try to calculate the energy tensor, but i can't do it like the article, and i don't know, i have a photo but it don't look very good, sorry for my english, i have a problem with a sign in the result Homework Equations The Attempt at a Solution In the photos...

Homework Statement ¿Why \Gamma^{k}_{i j} = (1/2) g^{k p} (g_{i p ,j}+ g_{j p ,i}- g_{i j , p}) can't be writed like \Gamma^{k}_{i j} = (1/2) g^{k p} (2 g_{i p ,j}+g_{i j , p}) if i can say that the metric is symmetric? Homework Equations That is the relevant equation The Attempt at a...

i think that |\psi \rangle = \frac{3}{4}|\psi_0\rangle + \frac{1}{4}|\psi_1\rangle its wrong the correct could be |\psi \rangle = (\frac{3}{4})^{1/2}|\psi_0\rangle + (\frac{1}{4})^{1/2}|\psi_1\rangle

Exp(-x) = 1/ exp(x) = 1/ (1+x) try in this form and show what you get, i hope this work

try expanding the exponential in different form

https://www.facebook.com/photo.php?v=10203261116186671&set=vb.1172349555&type=2&theater LOOK AT THIS

Ok, wait a minute.. i going to try to resolve and i will post a photo

Homework Statement look photo Homework Equations The Attempt at a Solution LOOK THE PHOTO