Coverings in the lattice of quasivarieties of \(\ell\)-groups
Let \(\mathcal A\) be the variety of abelian linearly ordered groups (\(\ell\)-groups). The authors present new examples of quasivarieties of \(\ell\)-groups that cover \(\mathcal A\). They consider the direct wreath product of two infinite cyclic groups and define a proper linear order on it. Then they prove that the quasivarieties generated by these \(\ell\)-groups cover \(\mathcal A\).
scientific article; zbMATH DE number 1534543