Carleman Estimates for Second Order Elliptic Operators with Limiting Weights, an Elementary Approach

Zengyu Li, Qi Lü

By using some deep tools from microlocal analysis, the authors of the papers (Ann. of Math., 165 (2007), 567--591, J. Amer. Math. Soc., 23 (2010), 655--691; Invent. Math., 178 (200…