Projectivity conjecture for noncommutative Hilbert schemes

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Let RR be a connected graded, strongly noetherian ring satisfying strong χ\chi, and let PP be a finitely graded, noetherian RR-module. The quotients of πP\pi P in qgr⁡R\operatorname{qgr} R with fixed Hilbert function hh are parameterized by a countable union of commutative projective schemes.

Projectivity conjecture. This union of schemes is actually a projective scheme.

The preceding theorem gives a countable union of commutative projective schemes parameterizing these quotients; the conjecture asserts that the entire parameter space is itself projective. Its resolution is not indicated in the supplied text.

References

Primary source

Dennis S. Keeler, “The rings of noncommutative projective geometry”, arXiv:math/0205005 (2002).

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