A finite quiver Q without loops or 2-cycles defines a CY3 triangulated category D(Q) and a finite heart A(Q)subset of D(Q). We show that if Q satisfies some (strong) conditions, then the space of stability conditions Stab(A(Q)) supported on this heart admits a natural family of semisimple Frobenius manifold structures, constructed using the invariants counting semistable objects in D(Q). In the case of An evaluating the family at a special point, we recover a branch of the Saito Frobenius structure of the An singularity y2=xn+1. We give examples where applying the construction to each mutation of Q and evaluating the families at a special point yields a different branch of the maximal analytic continuation of the same semisimple Frobenius manifold. In particular, we check that this holds in the case of An, n <= 5.

A construction of Frobenius manifolds from stability conditions / A. Barbieri, T. Sutherland, J. Stoppa. - In: PROCEEDINGS OF THE LONDON MATHEMATICAL SOCIETY. - ISSN 0024-6115. - 118:6(2019 Jun), pp. 1328-1366. [10.1112/plms.12217]

A construction of Frobenius manifolds from stability conditions

A. Barbieri
Co-primo
;
2019

Abstract

A finite quiver Q without loops or 2-cycles defines a CY3 triangulated category D(Q) and a finite heart A(Q)subset of D(Q). We show that if Q satisfies some (strong) conditions, then the space of stability conditions Stab(A(Q)) supported on this heart admits a natural family of semisimple Frobenius manifold structures, constructed using the invariants counting semistable objects in D(Q). In the case of An evaluating the family at a special point, we recover a branch of the Saito Frobenius structure of the An singularity y2=xn+1. We give examples where applying the construction to each mutation of Q and evaluating the families at a special point yields a different branch of the maximal analytic continuation of the same semisimple Frobenius manifold. In particular, we check that this holds in the case of An, n <= 5.
Settore MAT/03 - Geometria
giu-2019
23-nov-2018
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/791165
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