Symmetries and Conservation Laws of the System: pde's

摘要

After a short exposition of the theory of local and nonlocal symmetries andconservation laws for systems of partial differential equations (pde's), results on these and the recursion operator are listed for the system of pde's u(sub x) = vw(sub x), v(sub y) = uw(sub y), uv + w(sub xx) + w(sub yy) = O. In between, the methods of computation are explained.