Mathematics – Algebraic Geometry
Scientific paper
2009-09-02
Mathematics
Algebraic Geometry
25 pages, 5 figures. Substantially revised and corrected following referees comments. Main results same except i) stronger ass
Scientific paper
The space of stability conditions on a triangulated category is naturally partitioned into subsets $U(A)$ of stability conditions with a given heart $A$. If $A$ has finite length and $n$ simple objects then $U(A)$ has a simple geometry, depending only on $n$. Furthermore, Bridgeland has shown that if $B$ is obtained from $A$ by a simple tilt, i.e.\ by tilting at a torsion theory generated by one simple object, then the intersection of the closures of $U(A)$ and $U(B)$ has codimension one. Suppose that $A$, and any heart obtained from it by a finite sequence of (left or right) tilts at simple objects, has finite length and finitely many indecomposable objects. Then we show that the closures of $U(A)$ and $U(B)$ intersect if and only if $A$ and $B$ are related by a tilt, and that the dimension of the intersection can be determined from the torsion theory. In this situation the union of subsets $U(B)$, where $B$ is obtained from $A$ by a finite sequence of simple tilts, forms a component of the space of stability conditions. We illustrate this by computing (a component of) the space of stability conditions on the constructible derived category of the complex projective line stratified by a point and its complement.
No associations
LandOfFree
Stability conditions, torsion theories and tilting does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stability conditions, torsion theories and tilting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stability conditions, torsion theories and tilting will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-663377