Hilbert's third problem

Rationale Kurven in P^3 – Flächen und Sekanten

Integral points on polygons and modular forms

Curves on a surface - How they self-intersect and why this number can be less than zero

Mathematical Modelling of Rabies Elimination in N’Djamena, Chad

Arithmetic via Hyperelliptic Curves

A generalization of the beer mats puzzle

Höhenschranken für gewisse algebraische Zahlen

Hilbert’s tenth problem: Diophantine equations and decidability

Fractional closed geodesics and applications