Recent content by physicsgirl07

yes iknow ∇· [∇×a(x)] = ∂i[∇×a(x)]i = i jk∂i∂jak(x) but i want to prove it in 4-d becouse in 3-d equal to zero see this link http://www.scribd.com/doc/19388495/152/The-curl see the page that have title curl becouse i don't know how to wright the formula thanx

1. prove in the 4-dimensional Riemannian space, the 4-divergence of the 4-curl is not zero that is where is the 2d’Alembertian operator 2.∂νGμν = ∂μ∂νaν(xκ)−2aμ(xκ) = 0