approximate tangent space of \Omega ? -- and more
The text "in the approximate tangent space of the set $\Omega$." is confused. $\Omega$ is an open set, so the word "approximate" should be removed.
Approximate tangents are important in connection to rectifiable varifolds (which is a subclass of varifolds), and probably need to be mentioned later when $\Gamma_{M,A}$ is defined.
There might be more unpreciseness in the article, like that "there is no boundary operator": There is a first variation which very well stands for what boundary would be.
90.180.192.165 (talk) 00:47, 23 December 2012 (UTC)