Projectivity conjecture for noncommutative Hilbert schemes

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 qgrR\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.

Sources & referencesView supporting material

Primary source

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

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