Projects per year
Personal profile
Willing to supervise doctoral students
Projects available in
Averaging and Homogenisation for PDE;
Infinitedimensional dynamics: PDEs and lattice ODEs
Many particle dynamics and derivation of kinetic equations
Research interests
The main goal of my research is to develop rigorous mathematical methods to understand and describe the dynamical (temporal) behaviour of solutions of partial differential equations and other infinitedimensional dynamical systems. The studied equations are motivated by models in the physical sciences, where the aim is a mathematically rigorous analysis of model problems to achieve a proper and lasting understanding of structure and effects.
In particular I am interested in equations with additional properties like dependence on fast scales or broken symmetries. A key question is to identify some limiting description, when e.g. the period of the fast scale tending to zero in averaging or homogenisation. Then qualitative differences (e.g. pinning, splitting of separatrices) between the various systems are studied. The final aim is to give a quantitative description of effects causing the differences through rigorous error bounds.
There are three related areas of my research.
 Averaging and homogenisation aims at the description of partial differential equations with fast spatial and/or fast temporal scales, these break the symmetry in autonomous or homogeneous equations.
 Dynamics of waves: The understanding of existence, stability and behaviour of travelling waves is a prime example of dynamical behaviour in partial differential equations and discrete lattice equations.
 Deriving continuum equations from atomistic equations: This research aims at the basic question how equations on different scales can have fundamentally different behaviour.
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Projects

Derivation of kinetic equation: From Newton to Boltzmann via trees
1/10/20 → 31/03/24
Project: UK charity



ANALYSIS AND PARTIAL DIFFERENTIAL EQUATIONS
Engineering and Physical Sciences Research Council
1/09/05 → 31/08/10
Project: Research council
Research Output

Nonlinear and Nonlocal Eigenvalue Problems: variational existence, decay properties, approximation, and universal scaling limits
Herrmann, M. & Matthies, K., 2 Jul 2020, In : Nonlinearity. 33, 8, p. 4046–4074 29 p.Research output: Contribution to journal › Article
Open AccessFile6 Downloads (Pure) 
Rescaled Objective Solutions of FokkerPlanck and Boltzmann equations
Matthies, K. & Theil, F., 31 Dec 2019, In : SIAM Journal on Mathematical Analysis (SIMA). 51, 2, p. 1321–1348 28 p.Research output: Contribution to journal › Article
Open AccessFile2 Citations (Scopus)97 Downloads (Pure) 
Solitary waves in atomic chains and peridynamical media
Herrmann, M. & Matthies, K., 7 Mar 2019, In : Mathematics in Engineering. 1, 2, p. 281308 28 p.Research output: Contribution to journal › Article
Open Access 
Stability of highenergy solitary waves in FermiPastaUlamTsingou chains
Herrmann, M. & Matthies, K., 1 Sep 2019, In : Transactions of the American Mathematical Society. 372, 5, p. 3425–3486 62 p.Research output: Contribution to journal › Article
Open AccessFile4 Citations (Scopus)43 Downloads (Pure) 
Asymptotic properties of highspeed waves in atomic chains
Herrmann, M. & Matthies, K., 17 Dec 2018, In : PAMM  Proceedings in Applied Mathematics and Mechanics. 18, 1, 2 p., e201800305.Research output: Contribution to journal › Conference article