Chang-An Zhao

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math.NT2026

Rank-Two Drinfeld Modules over Elliptic Coordinate Rings

Chuangqiang Hu, Ze-Dong Huang, Chang-An Zhao

Let $A$ be the affine coordinate ring of $E ∖ {\infty}$ , where $E$ is an elliptic curve over $F_{q}$ and $\infty$ is rational. We solve the rank-two case of…

math.NT2026

Weierstrass semigroups at totally ramified places of degree one on linearized function fields

Huachao Zhang, Chang-An Zhao

A linearized function field $F$ can be viewed as a Galois extension of a rational function field $K (x)$ . For a totally ramified place $Q$ of degree one in $F / K (x)$ , we give a unifi…