A. Schweizer

activity

20062026

most citedBielliptic intermediate modular curves

15 citations · 83 across the 26 of their papers we have counts for

collaborators

26 papers

math.GR2026

Splittability, non-splittability, and automatic splittability of metacyclic $p$ -groups

Andreas Schweizer

Let $P$ be a finite metacyclic $p$ -group where $p$ is an odd prime. We refine the notions split metacyclic and non-split metacyclic group by distinguishing whether a metacyclic str…

math.CV2022★ 2 cited

A uniqueness problem concerning entire functions and their derivatives

Andreas Sauer, Andreas Schweizer

We determine all entire functions $f$ such that for nonzero complex values $a \neq = b$ the implications $f = a \Rightarrow f^{'} = a$ and $f^{'} = b \Rightarrow f = b$ hold. This solves an open…

math.NT2022★ 5 cited

Bielliptic quotient modular curves of $X_{0} (N)$

Francesc Bars, Mohamed Kamel, Andreas Schweizer

Let $N \geq 1$ be a non-square free integer and let $W_{N}$ be a non-trivial subgroup of the group of the Atkin-Lehner involutions of $X_{0} (N)$ such that the modular curve $X_{0} (N) / W_{N}$ …

math.NT2021★ 1 cited

Quasi-inner automorphisms of Drinfeld modular groups

A. W. Mason, Andreas Schweizer

Let $A$ be the set of elements in an algebraic function field $K$ over $F_{q}$ which are integral outside a fixed place $\infty$ . Let $G = G L_{2} (A)$ be a {\it Drinfeld modular…

math.NT2019★ 1 cited

Torsion of rational elliptic curves over different types of cubic fields

Daeyeol Jeon, Andreas Schweizer

Let $E$ be an elliptic curve defined over $\Q$, and let $G$ be the torsion group $E (K)_{t or s}$ for some cubic field $K$ which does not occur over $\Q$. In this paper, we determine…

math.NT2017★ 15 cited

Bielliptic intermediate modular curves

Daeyeol Jeon, Chang Heon Kim, Andreas Schweizer

We determine which of the modular curves $X_{Δ} (N)$ , that is, curves lying between $X_{0} (N)$ and $X_{1} (N)$ , are bielliptic. Somewhat surprisingly, we find that one of these curves has…

Splittability, non-splittability, and automatic splittability of metacyclic p-groups