  For a Lie superalgebra with Cartan matrix over a field of positive
characteristic, some information about its root system in terms of the system
of simple roots corresponding to the Chevalley generators is described, under
certain given assumptions. This information may be useful for finding other
systems of simple roots of such a Lie superalgebra and other Cartan matrices
which produce Lie superalgebras isomorphic to a given one.
