Measures on Banach Manifolds, Random Surfaces, and Nonperturbative   String Field Theory with Cut-offs
  We construct a cut-off version of nonpertubative closed Bosonic string field theory in the light-cone gauge with imaginary string coupling constant. We show that the partition function is a continuous function of the string coupling constant, and conjecture a relation between the formal power series expansion of this partition function and Riemann Surfaces. 
Jonathan Weitsman