Lattice of Mal'tsev theories
The paper continues the investigations initiated in [Algebra Logika 22, 693-706 (1983; Zbl 0575.08004)]. The author studies Mal'cev theories and proves that they form a complete lattice (under inclusion) which is dually isomorphic to the lattice of nonempty special Mal'cev classes (or \(S_{\delta}\)-classes).
scientific article; zbMATH DE number 3943891