Linear series on a curve of compact type bridged by a chain of elliptic curves

Maps from K-trivial varieties and connectedness problems

In this paper we study varieties covered by rational or elliptic curves. First, we show that images of Calabi-Yau or irreducible symplectic varieties under rational maps are almost always rationally connected. Second, we investigate elliptically connected and elliptically chain connected varieties, and varieties swept out by a family of elliptic curves. Among other things, we show that Calabi-Yau or hyperkähler manifolds which are covered by a family of elliptic curves contain uniruled divisors and that elliptically chain connected varieties of dimension at least two contain a rational curve, …

Limit linear series and tropical divisors on chains

We describe the space of Eisenbud-Harris limit linear series on a chain of elliptic curves and compare it with the theory of divisors on tropical chains. Either model allows to compute some invariants of Brill-Noether theory using combinatorial methods. We introduce effective limit linear series.

特定非辛簇的椭圆稳定包络与来自贝特/规范对应的超自旋链动力学$R$矩阵

Elliptic Stable Envelopes for Certain Non-Symplectic Varieties and Dynamical $R$-Matrices for Superspin Chains from the Bethe/Gauge Correspondence

本研究将椭圆稳定包络理论推广至非辛簇，借助贝特/规范对应，通过三维$\n=2$规范理论的Janus配分函数求解超自旋链的动力学杨-巴克斯特方程，并验证了低维约化结果与已有数学结论一致。

Brill-Noether loci with ramification at two points

We prove the injectivity of the Petri map for linear series on a general curve with given ramification at two generic points. We also describe the components of such a set of linear series on a chain of elliptic curves.

某些可约和不可约Brill-Noether定位集

Some reducible and irreducible Brill-Noether loci

本文基于链上椭圆曲线极限线束，证明Farkas猜想，发现可约Brill-Noether定位集的实例，并展示当r≥3时的可约Hilbert方案，同时给出r=2时Brill-Noether定位集不可约的最优界。

任意同源映射的除法多项式

Division polynomials for arbitrary isogenies

本文扩展了除法多项式定义至任意椭圆曲线同源映射，包括核不和身份元相加的映射，推导了递推关系、经典椭圆函数关系、源曲率与目标曲率间的关系链规则及高维推广。