3 papers
math.AG2026
Fast Isotopy Computation for T-Curves
Zoe Geiselmann, Michael Joswig, Lars Kastner +5
A T-curve of degree is given by a regular unimodular triangulation of together with a sign distribution on its lattice points. By Viro's Patchworking Theorem, thi…
math.AG2026
Drawing real plane algebraic curves in OSCAR
Anne Frühbis-Krüger, Michael Joswig, Lars Kastner
We show how the computer algebra system OSCAR can be used to obtain topologically correct or visually pleasing drawings of real plane algebraic curves.
math.CO2025
Tropical elliptic curves in 3-space
Laura Casabella, Lars Kastner, Raluca Vlad
We classify trivalent graphs with 16 vertices and 16 edges that arise from intersecting two quadratic surfaces in tropical 3-space. There are 4,009 such graphs, representing maxima…