A note on Bridgeland stability conditions and Catalan numbers

23 Dec 2020  ·  Jason Lo, Karissa Wong ·

In this short note, we describe a problem in algebraic geometry where the solution involves Catalan numbers. More specifically, we consider the derived category of coherent sheaves on an elliptic surface, and the action of its autoequivalence group on its Bridgeland stability manifold. In solving an equation involving this group action, the generating function of Catalan numbers arises, allowing us to use asymptotic estimates of Catalan numbers to arrive at a bound for the solution set.

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Algebraic Geometry Mathematical Physics Combinatorics Mathematical Physics 14J27, 14F07 (Primary) 05E14, 05A15 (Secondary)