New papers were added to the CvGmt Preprint Server - http://cvgmt.sns.it/ Title: A new approach to counterexamples to $L^1$ estimates: Korn's inequality, geometric rigidity and regularity for gradients of separately convex functions Author: Conti, Sergio Author: Faraco, Daniel Author: Maggi, Francesco http://cvgmt.sns.it/papers/confarmag/