It is produced 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
GREGORIO, Enrico
2006-01-01
Abstract
It is produced 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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