2012
DOI: 10.1090/s0002-9947-2012-05469-9
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Non-commutative $\mathbb{P}^{1}$-bundles over commutative schemes

Abstract: In this paper we develop the theory of non-commutative P 1 -bundles over commutative (smooth) schemes. Such non-commutative P 1 -bundles occur in the theory of D-modules but our definition is more general. We can show that every non-commutative deformation of a Hirzebruch surface is given by a non-commutative P 1 -bundle over P 1 in our sense.

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Cited by 35 publications
(99 citation statements)
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“…An important instance constitutes the basis for noncommutative projective geometry, in which to a sufficiently nice Z-graded algebra A, one associates a category QGr(A) of "quasi-coherent graded modules", obtained as the quotient of the graded modules by the torsion modules. This is motivated by Serre's well-known result that, for A commutative, we have QGr(A) ∼ = Qch(Proj(A)) (see [12,45,49,50] for more details and generalizations).…”
Section: Motivationmentioning
confidence: 99%
“…An important instance constitutes the basis for noncommutative projective geometry, in which to a sufficiently nice Z-graded algebra A, one associates a category QGr(A) of "quasi-coherent graded modules", obtained as the quotient of the graded modules by the torsion modules. This is motivated by Serre's well-known result that, for A commutative, we have QGr(A) ∼ = Qch(Proj(A)) (see [12,45,49,50] for more details and generalizations).…”
Section: Motivationmentioning
confidence: 99%
“…In this section, following [16], we define the noncommutative symmetric algebra of certain R − S-bimodules. Some of the exposition is adapted from [10, Section 2].…”
Section: Duality and Admissible Bimodulesmentioning
confidence: 99%
“…Next, we recall the definition of a noncommutative version of P 1 due to M. Van den Bergh [16]. If K and L are finite extensions of k and N is a K − L-bimodule of finite dimension as both a K-module and an L-module, then one can form the Z-algebra S nc (N ), the noncommutative symmetric algebra of N .…”
Section: Introductionmentioning
confidence: 99%
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“…The key observation is that many interesting categories, such as categories of twisted sheaves on global quotient stacks, can be viewed as suitably defined categories of modules over kernel algebras. Note that a very similar setup involving algebra objects in the monoidal category of sheaf bimodules is used in [50] to define noncommutative P 1 -bundles.…”
Section: Introductionmentioning
confidence: 99%