Abstract
Noncommutative hypersurfaces, in particular, noncommutative quadric hypersurfaces are major objects of study in noncommutative algebraic geometry. In the commutative case, Knörrer’s periodicity theorem is a powerful tool to study Cohen–Macaulay representation theory since it reduces the number of variables in computing the stable category of maximal Cohen–Macaulay modules over a hypersurface . In this paper, we prove a noncommutative graded version of Knörrer’s periodicity theorem. Moreover, we prove another way to reduce the number of variables in computing the stable category of graded maximal Cohen–Macaulay modules if is a noncommutative quadric hypersurface. Under the high rank property defined in this paper, we also show that computing over a noncommutative smooth quadric hypersurface in up to six variables can be reduced to one or two variable cases. In addition, we give a complete classification of over a smooth quadric hypersurface in a skew , where , without high rank property using graphical methods.
Citation
Izuru Mori. Kenta Ueyama. "Noncommutative Knörrer’s periodicity theorem and noncommutative quadric hypersurfaces." Algebra Number Theory 16 (2) 467 - 504, 2022. https://doi.org/10.2140/ant.2022.16.467
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