A STRUCTURAL APPROACH TO THE LOCALITY OF PSEUDOVARIETIES OF THE FORM LH ⓜ V
Benjamin Steinberg · International Journal of Algebra and Computation · 2010
We show that if H is a Fitting pseudovariety of groups and V is a local pseudovariety of monoids, then LH ⓜ V is local if either V contains the six element Brandt monoid, or H is a non-trivial pseudovariety of groups closed under extension.