Abstract

Functional methods are used to give a complete closure of the second-quantized field theory nonlinear realization of the ten-dimensional super-Poincare algebra for the heterotic superstring in the Green-Schwarz formalism. New terms in the fundamental generators J(I-), J+- are constructed at quartic order in the fields so as to close the Poincare algebra; a quartic term in the Hamiltonian is also derived. No higher order terms are needed for any generators of the full algebra.