A lower bound for the codimension of the $\mu=\operatorname{const}$ stratum in terms of the mixed Hodge structure

We show that the codimension of the strata $\mu=\operatorname{const}$ in the versal deformation base of a germ of a holomorphic function at a finitely degenerated critical point is, not less then the number of those spectral numbers for the mixed Hodge structure of the critical point of the germ which are less then $1+\beta$ where $\beta$ is the complex degree of singularity of the point.