Limit varieties of $J$-trivial monoids
2020
We show that limit varieties of monoids recently discovered by Gusev, Zhang and Luo and their subvarieties are generated by monoids of the form $M_\tau(W)$ for certain congruences $\tau$ on the free monoid. The construction $M_\tau(W)$ is a generalization of widely used Dilworth-Perkins construction. Using this construction we generalize a result of Jackson into a sufficient condition which implies that there are more limit varieties of $J$-trivial monoids.
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