Stability conditions and the braid group

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dc.creatorThomas, R. P.
dc.date2002-12-16
dc.date2006-04-26
dc.date.accessioned2026-07-07T06:35:33Z
dc.date.available2026-07-07T06:35:33Z
dc.descriptionWe find stability conditions ([Do], [Br]) on some derived categories of differential graded modules over a graded algebra studied in [RZ], [KS]. This category arises in both derived Fukaya categories and derived categories of coherent sheaves. This gives the first examples of stability conditions on the A-model side of mirror symmetry, where the triangulated category is not naturally the derived category of an abelian category. The existence of stability conditions, however, gives many such abelian categories, as predicted by mirror symmetry. In our examples in 2 dimensions we completely describe a connected component of the space of stability conditions as the universal cover of the configuration space of $(k+1)$ distinct points with centre of mass zero in $\C$, with deck transformations the braid group action of [KS], [ST]. This gives a geometric origin for these braid group actions and their faithfulness, and axiomatises the proposal for stability of Lagrangians in [Th] and the example proved by mean curvature flow in [TY].
dc.description21 pages, 4 figures. Much delayed published version; an unsurprising number of errors have been corrected
dc.identifierhttps://arxiv.org/abs/math/0212214
dc.identifierhttp://arxiv.org/abs/math/0212214
dc.identifierCommunications in Analysis and Geometry 14, 135-161, 2006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/99825
dc.subjectAlgebraic Geometry
dc.subjectQuantum Algebra
dc.subjectSymplectic Geometry
dc.subject14J32; 18E30 ; 53D40; 20F36
dc.titleStability conditions and the braid group
dc.typetext

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