Franz Achleitner

research interests

applications: biomathematics, population dynamics, spatial ecology, anomalous diffusion, optimal (random) search strategies, structure preserving numerical schemes, fluid dynamics (water waves), structural dynamics
models: evolution equations: reaction-diffusion equations, kinetic equations (of Fokker--Planck and Boltzmann type) in biomathematics and statistical physics, (viscous) hyperbolic conservation laws
concepts: existence, regularity and (meta)stability of solutions, asymptotic behavior of solutions, hypocoercivity (with quantitative decay rates)
methods: dynamical system theory, stochastic analysis, semigroup theory, spectral analysis, entropy/energy method

publications

23. F. Achleitner, A. Arnold, A. Jüngel: Necessary and sufficient conditions for strong stability of explicit Runge-Kutta methods, conference proceedings in "From Particle Systems to Partial Differential Equations", in the series "Springer Proceedings in Mathematics & Statistics", vol 465. Springer 2024, 1--21.
22. F. Achleitner, A. Arnold, V. Mehrmann, E. Nigsch: Hypocoercivity in Hilbert spaces, J. Functional Analysis 288 (2025), 38 pages, online first.
21. F. Achleitner, et al.: Fractional Dissipative PDEs, book chapter in: Kevrekidis, P.G., Cuevas-Maraver, J. (eds) Fractional Dispersive Models and Applications. Nonlinear Systems and Complexity, vol 37. Springer, Cham (2024), 30 pages.
20. F. Achleitner, A. Arnold, V. Mehrmann: Hypocoercivity in algebraically constrained partial differential equations with application to Oseen equations, J. Dyn. Diff. Equat. (2023), 43 pages, online first.
19. F. Achleitner, A. Arnold, E.A. Carlen: The hypocoercivity index for the short time behavior of linear time-invariant ODE systems, J. Differential Equations 371 (2023), 83--115.
18. F. Achleitner, A. Arnold, V. Mehrmann: Hypocoercivity and hypocontractivity concepts for linear dynamical systems, Electron. J. Linear Algebra 39 (2023), 33--61.
17. F. Achleitner, A. Arnold, V. Mehrmann: Hypocoercivity and controllability in linear semi-dissipative Hamiltonian ordinary differential equations and differential-algebraic equations, Z. Angew. Math. Mech. 2021; e202100171.
16. F. Achleitner, C. Kuehn, J.M. Melenk, A. Rieder: Metastable speeds in the fractional Allen--Cahn equation, Appl. Math. Comput. 408 (2021), Paper No. 126329, 18 pp.
15. F. Achleitner, A. Arnold, B. Signorello: On Optimal Decay Estimates for ODEs and PDEs with Modal Decomposition, conference proceedings in "Stochastic dynamics out of equilibrium", Vol. 282 of the series "Springer Proceedings in Mathematics & Statistics", Springer 2019, 241-264.
14. F. Achleitner, A. Jüngel, M. Yamamoto: Large-time asymptotics of a fractional drift-diffusion-Poisson system via the entropy method, Nonlinear Analysis 179, (2019), 270-293.
13. F. Achleitner, A. Arnold, E. Carlen: On multi-dimensional hypocoercive BGK models, Kinet. Relat. Models 11, (2018), no. 4, 953-1009.
12. F. Achleitner, Y. Ueda: Asymptotic stability of traveling wave solutions for nonlocal viscous conservation laws with explicit decay rates, Journal of Evolution Equations 18, (2018), no.2, 923-946.
11. F. Achleitner: Two classes of nonlocal Evolution Equations related by a shared Traveling Wave Problem, conference proceedings in "From Particle Systems to Partial Differential Equations IV", Volume 209 of the series "Springer Proceedings in Mathematics & Statistics", Springer 2017, 47-72.
10. C. M. Cuesta, F. Achleitner: Addendum to "Travelling waves for a non-local Korteweg-de Vries-Burgers equation” [J. Differential Equations 257 (2014), no. 3, 720-758], J. Differential Equations 262, (2017), no. 2, 1155-1160.
9. F. Achleitner, A. Arnold, E. Carlen: On linear hypocoercive BGK models, conference proceedings in "From Particle Systems to Partial Differential Equations III", Volume 162 of the series "Springer Proceedings in Mathematics & Statistics", Springer 2016, 1-37
8. F. Achleitner, A. Arnold, D. Stürzer: Large-time behavior in non-symmetric Fokker-Planck equations, Rivista di Matematica della Universit`a di Parma 6, No. 1 (2015), 1-68.
7. F. Achleitner, C. Kuehn: Analysis and numerics of traveling waves for asymmetric fractional reaction-diffusion equations, in Communications in Applied and Industrial Mathematics 6, No. 2 (2015).
6. F. Achleitner, C. Kuehn: Traveling waves for a bistable equation with nonlocal diffusion, Advances in Differential Equations 20, No. 9-10 (2015), 887-936.
5. F. Achleitner, C. Kuehn: On bounded positive stationary solutions for a nonlocal Fisher-KPP equation, Nonlinear Analysis 112 (2015), 15-29.
4. F. Achleitner, C.M. Cuesta, S. Hittmeir: Travelling waves for a non-local Korteweg-de Vries-Burgers equation, J. Differential Equations 257, No. 3 (2014), 720-758.
3. F. Achleitner, S. Hittmeir, C. Schmeiser: On nonlinear conservation laws regularized by a Riesz-Feller operator, in Proceedings of the conference on Hyperbolic Problems HYP2012 in Padova 2012, F. Ancona, A. Bressan, P. Marcati, A. Marson (eds.), AIMS 2014.
2. F. Achleitner, P. Szmolyan: Saddle-node bifurcation of viscous profiles, Physica D. Nonlinear Phenomena 241, No. 20 (2012), 1703-1717.
1. F. Achleitner, S. Hittmeir, C. Schmeiser: On nonlinear conservation laws with a nonlocal diffusion term, J. Differential Equations 250, No. 4 (2011), 2177-2196.

theses

a. F. Achleitner: "Evolution Equations with Fractional Diffusion", habilitation thesis, TU Wien 2018.
b. F. Achleitner: "Bifurcation and stability of viscous shock waves in viscous conservation laws", doctoral thesis, TU Wien 2009.
c. F. Achleitner: "Spectral stability of small amplitude shock profiles of the Jin-Xin model", master thesis, TU Wien 2004.

honors

2016 Best Paper Award 2015, Faculty of Mathematics & Geoinformation, TU Wien
2012 Best Paper Award 2011, Faculty of Mathematics & Geoinformation, TU Wien

services

12/2012 Reporter of the MFO Workshop Classical and Quantum Mechanical Models of Many-Particle Systems, MFO Oberwolfach, Germany.

collaborators

Anton Arnold
Eric Carlen
Carlota M. Cuesta
Jean Dolbeault
Sabine Doppler
Ansgar Jüngel
Christian Kühn
Volker Mehrmann
Markus Melenk
Christian Schmeiser
Dominik Stürzer
Peter Szmolyan
Yoshihiro Ueda
Adrian Viorel