EQUATIONS OF THE (2,0)-THEORY AND KNITTED FIVEBRANES

We study non-linear corrections to the low-energy description of the ( 2,0) theory. We argue for the existence of a topological correction te rm similar to the C-3 boolean AND X-8(R) in M-theory. This term can be traced to a classical effect in supergravity and to a one-loop diagra m of the effective 4+1D Super Yang-Mills. We study other terms which a re related to it by supersymmetry and discuss the requirements on the subleading correction terms from M(atrix) theory. We also speculate on a possible fundamental formulation of the theory.