Approximate Symmetries of Lagrangians for Plane Symmetric Gravitational Wave-Like Spacetimes
arXiv:0901.2278 · doi:10.1393/ncb/i2007-10379-5
Abstract
Using Lie symmetry methods for differential equations we have investigated the symmetries of a Lagrangian for a plane symmetric static spacetime. Perturbing this Lagrangian we explore its approximate symmetries. It has a non-trivial first-order approximate symmetry.
5 pages