A result of Bridson, Howie, Miller and Short states that if
is a subgroup of type
of the direct product
of
limit groups over
free groups, then
is virtually the direct product of limit groups over free groups. Furthermore, they
characterise finitely presented residually free groups. In this paper these results are
generalised to limit groups over Droms right-angled Artin groups. Droms
RAAGs are the right-angled Artin groups with the property that all of their
finitely generated subgroups are again RAAGs. In addition, we show that the
generalised conjugacy problem is solvable for finitely presented groups that are
residually a Droms RAAG, and that their finitely presentable subgroups are
separable.
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