Structure of Quasivariety Lattices. IV. Nonstandard Quasivarieties
A. V. Kravchenko, Anvar M. Nurakunov, М. V. Schwidefsky · Siberian Mathematical Journal · 2021
In the previous articles of this series, some sufficient conditions were found for a quasivariety to possess continuum many subquasivarieties with certain properties. Here we prove that these conditions also imply the existence of continuum many nonstandard subquasivarieties. We present a few applications of this result.