Conic divisorial ideals of Hibi rings and their applications to non-commutative crepant resolutions

Akihiro Higashitani; Yusuke Nakajima

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arxiv 1702.07058 v3 pith:L4N3DQZI submitted 2017-02-23 math.RT math.ACmath.AGmath.CO

Conic divisorial ideals of Hibi rings and their applications to non-commutative crepant resolutions

Akihiro Higashitani , Yusuke Nakajima This is my paper

classification math.RT math.ACmath.AGmath.CO

keywords divisorialidealsconiccalledcrepantgivinghibinon-commutative

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In this paper, we study divisorial ideals of a Hibi ring which is a toric ring arising from a partially ordered set. We especially characterize the special class of divisorial ideals called conic using the associated partially ordered set. Using our description of conic divisorial ideals, we also construct a module giving a non-commutative crepant resolution (= NCCR) of the Segre product of polynomial rings. Furthermore, applying the operation called mutation, we give other modules giving NCCRs of it.

Conic divisorial ideals of Hibi rings and their applications to non-commutative crepant resolutions

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