  It is argued that the Girvin, MacDonald and Platzman (GMP) evaluation of the
magneto-roton spectrum, in spite of probably being a sensible estimate of the
excitation spectrum around the real ground state, is not implying the
variational stability of the Laughlin state. The suplementary corrections
needed to produce a variational calculation around the Laughlin state at 1/3
value of the filling factor are evaluated approximately. The results indicate,
within the considered approximation, the existence of lower lying states for a
range of wavevector values.
