Abstract
In analogy with classical projective algebraic geometry, Hilbert functors can be defined for objects in any Abelian category. We study the moduli problem for such objects. Using Grothendieck's general framework. We show that with suitable hypotheses the Hilbert functor is representable by an algebraic space locally of finite type over the base field. For the category of the graded modules over a strongly Noetherian graded ring, the Hilbert functor of graded modules with a fixed Hilbert series is represented by a commutative projective scheme. For the projective scheme corresponding to a suitable noncommutative graded algebra, the Hilbert functor is represented by a countable union of commutative projective schemes.
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Artin, M., Zhang, J.J. Abstract Hilbert Schemes. Algebras and Representation Theory 4, 305–394 (2001). https://doi.org/10.1023/A:1012006112261
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DOI: https://doi.org/10.1023/A:1012006112261