TY - GEN T1 - Boundary estimates for solutions of the obstacle problem with two phases A1 - Apushkinskaya,Darya A1 - Uraltseva,Nina Y1 - 2012/03/13 N2 - For weak solutions of the two-phase obstacle problem \Delta u=\lambda^{+}\chi_{\{u>0\}}-\lambda^{-}\chi_{\{u<0\}} in B_{1}^{+}, \lambda^{\pm}\geq0, \lambda^{+}+\lambda^{-}>0, satisfying the non-zero Dirichlet condition on the flat part of \partial B_{1}^{+}, we obtain the optimal regularity, i.e., we show that u is a W_{\infty}^{2}-function. CY - Saarbrücken PB - Universitäts- und Landesbibliothek AD - Postfach 151141, 66041 Saarbrücken UR - http://scidok.sulb.uni-saarland.de/volltexte/2012/4670 ER -