4 papers · 1 filter
Existence of weak solutions to a dynamic model for smectic-A liquid crystals under undulations
Etienne Emmrich, Robert Lasarzik
A nonlinear model due to Soddemann et al. [37] and Stewart [38] describing incompressible smectic-A liquid crystals under flow is studied. In comparison to previously considered mo…
Nonlinear evolution equations with exponentially decaying memory: Existence via time discretisation, uniqueness, and stability
André Eikmeier, Etienne Emmrich, Hans-Christian Kreusler
The initial value problem for an evolution equation of type is studied, where is a monotone, coercive operator and where induc…
Convergence of the backward Euler scheme for the operator-valued Riccati differential equation with semi-definite data
Monika Eisenmann, Etienne Emmrich, Volker Mehrmann
For initial value problems associated with operator-valued Riccati differential equations posed in the space of Hilbert--Schmidt operators existence of solutions is studied. An exi…
An existence result and evolutionary -convergence for perturbed gradient systems
Aras Bacho, Etienne Emmrich, Alexander Mielke
The initial-value problem for the perturbed gradient flow \[ B(t,u(t)) \in \partialΨ_{u(t)}(u'(t))+\partial \mathcal E_t(u(t)) \text{ for a.a. } t\in (0,T),\qquad u(0)=u_0 \] with…