Abstract:
If a quasivariety $\mathbf{K}$ contains a $\mathrm{B}^\ast$-class then $\mathbf{K}$ satisfies sufficient conditions for $Q$-universality found by V. A. Gorbunov.
This research was carried out within the framework of the state contract of the Sobolev Institute of Mathematics, project no. 0314-2019-0003. This work is also partially supported by the RSF, project no. 19-11-00209 (Theorem 6).