and Stephen C. Anco. It includes a significant update of the material in the last three
chapters of Symmetries and Differential Equations (1989; reprinted with corrections, 1996),
by George W. Bluman and Sukeyuki Kumei. The emphasis in the present book is on how to
find systematically symmetries (local and nonlocal) and conservation laws (local and
nonlocal) of a given PDE system and how to use systematically symmetries and …