1. Uniquely covered radical classes of $\ell$-groups Creator: Zhang, Y. and Wang, Y. Format: bez média and svazek Type: model:article and TEXT Subject: radical class, atom, unique covering question, quasi-complement radical class, and $\sigma $-homogeneous Language: English Description: It is proved that a radical class $\sigma $ of lattice-ordered groups has exactly one cover if and only if it is an intersection of some $\sigma $-complement radical class and the big atom over $\sigma $. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public