Ulla Karhumäki

activity

20162024

collaborators

3 papers

math.GR2024

Fixed point subgroups of a supertight automorphism

Ulla Karhumäki

Let $G$ be an infinite simple group of finite Morley rank and $α$ a supertight automorphism of $G$ so that the fixed point subgroup $P_{n} := C_{G} (α^{n})$ is pseudofinite for all $n\in \m…

math.GR2020

Small groups of finite Morley rank with a supertight automorphism

Ulla Karhumäki, Pınar Uğurlu

Let $G$ be an infinite simple group of finite Morley rank and of Prüfer $2$ -rank $1$ which admits a supertight automorphism $α$ such that the fixed-point subgroup $C_{G} (α^{n})$ is pse…

cs.CC2016

Online Exploration of Rectangular Grids

Hans-Joachim Böckenhauer, Janosch Fuchs, Ulla Karhumäki +1

In this paper, we consider the problem of exploring unknown environments with autonomous agents. We model the environment as a graph with edge weights and analyze the task of visit…