v1.1:
* Fixed: Typo: c_n\sim n^{-3/2} not n^{3/2}
v1.0:
* Fixed: Missing factor of 1/2 in expansion of f.
* Fixed: mean is not necessary in Theorem 3.
* Added: Lemma on Central Limit Theorem with infinite Variance.
* Miscellaneous changes and fixes.