ReLie: A Reduce Program for Lie Group Analysis of Differential Equations

Lie symmetry analysis provides a general theoretical framework for investigating ordinary and partial differential equations. The theory is completely algorithmic even if it usually involves lengthy computations. For this reason, along the years many computer algebra packages have been developed to automate computation. In paper, we describe program ReLie, written in Computer Algebra System Reduce, since 2008 an open source all platforms. ReLie able perform almost automatically needed computations of Its code freely available too. use illustrated by means some examples; nevertheless, be underlined that proves effective also more complex where one has deal with very large expressions.