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math.GR2017
On finitely generated submonoids of virtually free groups
Pedro V. Silva, Alexander Zakharov
We prove that it is decidable whether or not a finitely generated submonoid of a virtually free group is graded, introduce a new geometric characterization as quasi-geodesic monoid…
math.GR2017
Intersection problem for Droms RAAGs
Jordi Delgado, Enric Ventura, Alexander Zakharov
We solve the subgroup intersection problem (SIP) for any RAAG G of Droms type (i.e., with defining graph not containing induced squares or paths of length 3): there is an algorithm…