Algebraic billiards in the Fermat hyperbola

Autor:	Weinreich, Max
Rok vydání:	2024
Předmět:	Mathematics - Dynamical Systems 37C83 (Primary) 37P05 37F80 37B40 (Secondary)
Druh dokumentu:	Working Paper
Popis:	Algebraic billiards in a plane curve of degree $d \geq 2$ is a rational correspondence on a surface. The dynamical degree is an algebraic analogue of entropy that measures intersection-theoretic complexity. We compute a lower bound on the dynamical degree of billiards in the generic algebraic curve of degree $d$ over any field of characteristic coprime to $2d$, complementing the upper bound in our previous work. To do this, we specialize to a highly symmetric curve that we call the Fermat hyperbola. Over $\mathbb{C}$, we construct an algebraically stable model for this billiard via an iterated blowup. Over general fields, we compute the growth of a particular big and nef divisor. Comment: 34 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2406.16172 Zobrazit plný text záznamu View this record from Arxiv