TY - JOUR AU - Fernández Jambrina, Leonardo AU - González Romero, Luis Manuel PY - 1999 DO - 10.1088/0264-9381/16/3/023 SN - 0264-9381 UR - https://hdl.handle.net/20.500.14352/59737 T2 - Classical and quantum gravity AB - In this paper a new formalism based on exterior differential systems is derived for perfect-fluid spacetimes endowed with an abelian orthogonally transitive G_2 group of motions acting on spacelike surfaces. This formulation allows simplifications of... LA - eng M2 - 953 PB - IOP Publishing Ltd KW - Inhomogeneous cosmologies KW - Singularity TI - Exterior differential system for cosmological G_2 perfect fluids and geodesic completeness TY - journal article VL - 16 ER -