Supersymmetric matrix models and branched polymers
  We solve a supersymmetric matrix model with a general potential. While matrix models usually describe surfaces, supersymmetry enforces a cancellation of bosonic and fermionic loops and only diagrams corresponding to so-called branched polymers survive. The eigenvalue distribution of the random matrices near the critical point is of a new kind. 
J. Ambjorn, Y. Makeenko and K. Zarembo