RT Journal Article T1 The prescribed curvature problem in dimension four. A1 Muñoz Masqué, Jaime A1 Pozo Coronado, Luis Miguel A1 Sánchez Rodríguez, I. AB Necessary and sufficient conditions for a g-valued differential 2-form on a 4-dimensional manifold to be, locally, a curvature; form, are given. The dimension four is exceptional for the problem of prescribed curvature as, in this dimension, Bianchi's identities can be eliminated for a large class of Lie algebras, including semisimple algebras. Hence, the curvature forms are characterized as the solutions to a second-order partial differential system, which is proved to be formally integrable. PB Elsevier SN 0021-7824 YR 2009 FD 2009 LK https://hdl.handle.net/20.500.14352/50239 UL https://hdl.handle.net/20.500.14352/50239 LA eng NO Ministerio de Ciencia e Innovación NO Junta de Andalucía, P.A.I. DS Docta Complutense RD 4 abr 2025