On the lattice of conatural classes of linear modular lattices

The collection of all cohereditary classes of modules over a ring R is a pseudocomplemented complete big lattice. The elements of its skeleton are the conatural classes of R -modules. In this paper we extend some results about cohereditary classes in R - Mod to the category LM L M of linear modular lattices, which has as objects all complete modular lattices and as morphisms all linear morphisms. We introduce the big lattice of conatural classes in LM L M , and we obtain some results about it, paralleling the case of R -Mod and arriving at its being boolean. Finally, we prove some closure properties of conatural classes in LM L M .