On the Julia sets of the non-autonomous iteration of exponential maps
Abstract
This paper studies non-autonomous iterations of λez, where at each step the parameter λ is chosen from a bounded interval. Urbański and Zdunik introduced and developed a thermodynamic formalism for random dynamics of exponential maps, extending the autonomous result established independently by Rees and Lyubich to typical parameter sequences in [A, B]ℕ with 1/e<A<B<∞. In this paper, we show that the same conclusion indeed holds for all parameters in [A, B]ℕ, Our proof is based on carefully crafted uniform versions of pullback arguments, inspired by the original methods of Rees and Lyubich. In a related direction, Urbański and Zdunik established a non-autonomous analogue of Misiurewicz's theorem for the exponential map, later refined by Lech. We further extend their work by providing a refined condition for the Julia set to be the entire complex plane.
Related
- Uniformization of Julia sets of geometrically finite rational maps
- The Intersection of nested filled-in little Julia sets have zero area
- Wandering exposed Julia components of rational maps
- Continuity of the Julia sets in non-archimedean and hybrid settings
- Sierpiński carpet Julia sets of transcendental entire functions
BibTeX
@misc{huang2026julia,
title = {{On the Julia sets of the non-autonomous iteration of exponential maps}},
author = {Jiaxing Huang and Xiao Yao},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.14794},
eprint = {2610.14794},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.14794},
}
RIS
TY - UNPB
TI - On the Julia sets of the non-autonomous iteration of exponential maps
AU - Jiaxing Huang
AU - Xiao Yao
PY - 2026
DA - 2026/10/10
PB - arXiv
DO - 10.48550/arxiv.2610.14794
UR - https://arxiv.org/abs/2610.14794
AB - This paper studies non-autonomous iterations of λe^z, where at each step the parameter λ is chosen from a bounded interval. Urbański and Zdunik introduced and developed a thermodynamic formalism for random dynamics of exponential maps, extending the autonomous result established independently by Rees and Lyubich to typical parameter sequences in [A, B]^ℕ with 1/e<A<B<∞. In this paper, we show that the same conclusion indeed holds for all parameters in [A, B]^ℕ, Our proof is based on carefully crafted uniform versions of pullback arguments, inspired by the original methods of Rees and Lyubich. In a related direction, Urbański and Zdunik established a non-autonomous analogue of Misiurewicz's theorem for the exponential map, later refined by Lech. We further extend their work by providing a refined condition for the Julia set to be the entire complex plane.
ER -