activity
20062026
most citedOn the speed of convergence of Newton's method for complex polynomials

18 citations · 65 across the 24 of their papers we have counts for

collaborators

25 papers

q-bio.PE2026

Effect of antibiotic spectrum on the abundance of resistant bacteria in multispecies communities

Magnus Aspenberg, Erik Andreas Martens, Kristofer Wollein Waldetoft

Antibiotic resistance is a major threat to global health. It emerges in multispecies microbial communities under antibiotic exposure. This makes antibiotic spectrum -- a drug's dis…

q-bio.PE2025

Stable equilibria in the Lotka-Volterra equations

Magnus Aspenberg, Erik Martens, Kristofer Wollein Waldetoft

We consider the Lotka-Volterra system and provide necessary conditions for an equilibrium to be stable. Our results naturally complement earlier fundamental results by N. Adachi, Y…

math.DS2024

Collet-Eckmann maps in the unicritical family

Magnus Aspenberg, Mats Bylund, Weiwei Cui

In this paper we study perturbations of complex unicritical polynomials satisfying the Collet-Eckmann condition. We show that Collet-Eckmann parameters are Lebesgue density points…

math.DS2022

A parameter ASIP for the quadratic family

Magnus Aspenberg, Viviane Baladi, Tomas Persson

Consider the quadratic family , for and mixing Collet--Eckmann (CE) parameters . For bounded , set $\tilde φ_{a} := φ- \int φ\,…

math.DS2022

Slowly recurrent Collet-Eckmann maps with non-empty Fatou set

Magnus Aspenberg, Mats Bylund, Weiwei Cui

In this paper we study rational Collet-Eckmann maps for which the Julia set is not the whole sphere and for which the critical points are recurrent at a slow rate. In families wher…

math.DS2022

Perturbations of exponential maps: Non-recurrent dynamics

Magnus Aspenberg, Weiwei Cui

We study perturbations of non-recurrent parameters in the exponential family. It is shown that the set of such parameters has Lebesgue measure zero. This particularly implies that…