Pflaum, Christoph2018-08-242018-08-241996-11-22Pflaum, C. (1996). On the regularity of elliptic differential equations using symmetry techniques and suitable discrete spaces. <i>Electronic Journal of Differential Equations, 1996</i>(11), pp. 1-9.1072-6691https://hdl.handle.net/10877/7614We present an elementary and short proof for regularity of second order elliptic differential equations with homogeneous Dirichlet boundary conditions. The proof uses a discrete function space with piecewise multilinear functions and symmetry techniques on the unit cube.Text9 pages1 file (.pdf)enAttribution 4.0 InternationalRegularity of elliptic differential equationsArticle