A particular dispersive generalization of long water wave equation in 1 + 1 dimensions, which is important in the study of matrix models without scaling limit, known as two–Boson (TB) equation, as well as the associated hierarchy has been derived from the zero curvature condition on the gauge group SL(2, R) ⊗ U(1). The supersymmetric extension of the two–Boson (sTB) hierarchy has similarly been...