TY - JOUR T1 - Regularity Results for Nonlinear Systems of Partial Differential Equations Under Weak Ellipticity Conditions JO - Journal of Partial Differential Equations VL - 3 SP - 217 EP - 225 PY - 2000 DA - 2000/08 SN - 13 DO - http://doi.org/ UR - https://global-sci.org/intro/article_detail/jpde/5508.html KW - Regularity KW - nonlinear system KW - ellipticity KW - weak solution KW - Lipschitz continuity AB - We prove C^{1,α} almost everywhere regularity for weak solutions in the space W^{1,k} (Ω, R^N) of the systems - D_αA^i_α(x,u,Du) = B^i(z,u,Du) under the weak ellipticity condition ∫A(x_0 ,u, p + DΦ) ⋅ DΦdy ≥ λ ∫ (|DΦ|² + |DΦ|^k)dy.