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We consider a system of linear equations, whose coefficients depend linearlyon interval parameters. Its solution set is defined as the set of all solutionsof all admissible realizations of the parameters. We study unbounded directionsof the solution set and its relation with its kernel. The kernel of a matrixcharacterizes unbounded direction in the real case and in the case of ordinaryinterval systems. In the general parametric case, however, this is notcompletely true. There is still a close relation preserved, which we discuss inthe paper. Nevertheless, we identify several special sub-classes, for which thecharacterization remains valid. Next, we extend the results to the so called AEparametric systems, which are defined by forall-exists quantification.

On unbounded directions of linear interval parametric systems and their extensions to AE solutions