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Math Planck People

Marie Trin

Published July 20, 2026

Hi, my name is Marie Trin, I am currently a postdoc in Anna Wienhard's group. Prior to this I was a PhD student in Rennes in the group of Ergodic theory where my advisor was Juan Souto.

My research is at the interplay between hyperbolic geometry, ergodic theory and geometric group theory. The core of my work is about curves on surfaces and objects that generalize this notion such as measured laminations and geodesic currents. I am interested in the action of the mapping class group and its subgroups on these objects and use ergodic theory tools to study the orbits of these actions. I am also interested in some group theoretic notions arising from the study of the mapping class group. More generally, I am always happy to discuss any math topic that can be drawn.

I like art and I really think that artists and mathematicians have a lot to learn from each-others. I collaborated during my PhD with a graphic designer who created initials for the chapters of my manuscript inspired from the mathematical objects I study.

When I am not at the MPI I spend a lot of time doing different art activities, but also enjoying the nature or exploring nearby cities. Since I have been in Leipzig I also try to learn German with our amazing German teacher Mirke.

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