On lattices of varieties of metabelian groups
M. S. Brooks · Journal of the Australian Mathematical Society · 1971
This paper presents an example to show that the lattice of subvarieties of 3, 9 Λ 11 is non-distributive. The example is used further to show that a certain ‘canonic” description for non-nilpotent subvarieties of p p2, p prime, is generally not unique.