We present four infinite series of new quantum theories with super-Poincare symmetry in six dimensions, which are not local quantum field theories. They have string like excitations but the string coupling is of order one. Compactifying these theories on T⁵ we find a Matrix theory description of M theory on T⁵ and on T⁵/₂, which is well defined and is manifestly U-duality invariant.
No takes yet. Share an insight, caveat, or question.
Nathan Seiberg (1997) studied this question.