Singularities of relativistic membranes J. Eggers; J. Hoppe; M. Hynek; N. Suramlishvili — 2015 Geometric Flows Pointing out a crucial relation with caustics of the eikonal equation we discuss the singularity formation of 2-dimensional surfaces that sweep out 3-manifolds of zero mean curvature in R3,1.
Dynamical symmetries in supersymmetric matrix models. Bach, V.; Hoppe, J.; Lundholm, D. — 2008 Documenta Mathematica