David Maratinez Crespo is visiting mathematics this semester for three months (4 January to 4 April). He is a PhD student from the Universidad de Zaragoza in Spain. His host for the visit is Cesare Tronci, and his research topic for the visit is “Lyapunov stability of coupled quantum-classical dynamics“. He is also participating in the Tronci Research Group discussions. The group is shown below: left-to-right is Cesare, Paul Bergold, David, Werner Bauer, and Robert Piel.