We describe a miniversal deformation of invariant subspaces (with regard to a fixed endomorphism) by means of a technique which can be applied to obtain explicitly miniversal deformations in a general orbit space. In addition, we present an application to the problem of classifying invariant subspaces.
Ferrer Llop, Josep; Puerta Sales, Fernando. “Versal deformations of invariant subspaces”. Linear Algebra and its Applications, 2001, núm. 332-334, p. 569-582.