Let X be a simply-connected, smooth, projective Calabi-Yau threefold. To my understanding, Bridgeland introduced stability conditions on triangulated categories to give a proper mathematical definition of the stringy Kahler moduli space (SKMS) from physics.
Conjecturally, the classical (complexified) Kahler cone KX(C) of X gives an open chart on the SKMS around the large-volume limit. Coordinates on KX(C) are called Kahler moduli, and depending on the context, one may prefer to think of them as formal variables tracking degrees along effective curve classes in X, i.e. effective classes in H2(X,Z).
Classically, it makes sense to consider only certain Kahler moduli: this would be some sort of sub-cone, or collection of sub-cones, in KX(C). For example, one setting I'm interested in is when we have a proper surjective map
f:X→P1
whose generic fibers are Calabi-Yau surfaces. You have certain Kahler moduli tracking curve classes in the fibers of f, and other Kahler moduli tracking classes "transverse" to the fibers. One might want to focus on just fiber classes, or transverse classes.
So my question is: can one expect submanifolds of the Bridgeland stability manifold/SKMS which correspond to only specific Kahler moduli, as I've described above?
For example, in the case of fiber classes of f, one can define the Serre subcategory Coh(f)0 of Coh(X) whose objects are coherent sheaves on X supported on the fibers of f. You then get a full triangulated subcategory Db(X)f⊂Db(X) consisting of objects whose cohomology sheaves lie in Coh(f)0.
By applying the machinery of Bridgeland to Db(X)f or some similar triangulated subcategory, can one find a submanifold of the stability manifold/SKMS corresponding to fiber classes of f?
This post imported from StackExchange MathOverflow at 2020-01-22 12:09 (UTC), posted by SE-user Benighted