Associated with each ring R
over which every nonzero right module has a minimal submodule is an ordinal
number called its right (lower) Loewy length. The concern here is with the various
possible left and right Loewy lengths of such rings with zero radical and with
the possible right-left symmetry of this minimal submodule condition. In
particular, if R has finite right Loewy length n then R has left Loewy length
≦ 2n− 1.