The authors produce a class of examples of right quasitilted rings which are not right tilted. In each example, the torsion-free class is cogenerated by a cotilting module. In contrast, for a quasitilted Artin algebra, the same condition implies that the algebra is tilted.
A class of quasitilted rings that are not tilted
COLPI, RICCARDO;
2006
Abstract
The authors produce a class of examples of right quasitilted rings which are not right tilted. In each example, the torsion-free class is cogenerated by a cotilting module. In contrast, for a quasitilted Artin algebra, the same condition implies that the algebra is tilted.
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