The lattice of subvarieties of the variety defined by externally compatible identities of abelian groups of exponent \(n\)
For \(n\geq1\), the lattice mentioned in the title is described. Here an identity \(s=t\) is called externally compatible if \(s\) and \(t\) are either identical or have the same outermost operation symbol.
scientific article; zbMATH DE number 5189070
scientific article