Month: February 2026

Mikaela Iacobelli

Mikaela Iacobelli

Born in Giulianova, Italy • Birth year 1987 • Studied Mathematics at Sapienza University of Rome, Italy • PhD in Mathematics from Sapienza University of Rome and École Polytechnique in Paris • Lives in Zürich, Switzerland • Associate Professor of Mathematics at ETH Zürich

I was born in a small town on the Adriatic coast, Giulianova (Italy), where I lived with my family until the end of high school. As a child I was very curious and I loved reading; at school I enjoyed many subjects, without feeling particularly drawn to mathematics. Outside school, however, my real passion was figure skating, and for years I was completely absorbed by sport.

During high school, while I was changing my mind many times about what I wanted to study at university (from humanities to engineering to medicine), I also had a bad injury that made me stop figure skating, and this forced me to think seriously about what I could do if I could no longer be an athlete. Around the same time, at the beginning of high school, I encountered my first proofs in Euclidean geometry, and the very concept of proof fascinated me immediately.

Then, in my last year of high school, a teacher lent me the books by Henri Poincaré on non-Euclidean geometry, and that was decisive for me, because it made mathematics feel much larger than the standard school programme; it showed me that one can develop concepts with strong internal coherence and genuine beauty even when they are not tied to something directly visible, and study them for their own sake, not because of immediate utility.

(…) I became truly passionate about algebra, especially representation theory, because I was attracted by the beauty of symmetry and by the feeling that, once you find the right structure, complicated objects become understandable

Long story made short, I moved to Rome and started a Bachelor in Mathematics at Sapienza University, and it is there that I became truly passionate about algebra, especially representation theory, because I was attracted by the beauty of symmetry and by the feeling that, once you find the right structure, complicated objects become understandable. During my Bachelor and Master I specialised in algebra, although at the same time I was also fascinated by mathematical physics, which remained, for a while, a parallel interest rather than my main direction.

Towards the end of my Master, I decided to apply for a PhD in a different area, namely kinetic theory and PDEs, and in November 2012 I started a joint PhD between Sapienza University of Rome and École Polytechnique (Paris). Since I had to adapt quickly, both mathematically and personally, I remember that period as intense: you learn new tools, you learn a new language, and you also live with the constant uncertainty that comes with academic transitions, where the next step is never fully guaranteed.

(…) what I like in [Vlasov-Poisson] questions is the interaction between several scales: you start from a microscopic description (many particles), and you try to understand what kind of macroscopic behaviour can emerge, and why

The PhD became even more demanding because I changed topic between the first and the second year, which meant that I started the thesis “for real” only in autumn 2013, while I defended in December 2015. In spite of the stress, I was also lucky, because I ended up working on problems that genuinely interested me, such as quantization of measures and, later, quasineutral limits for the Vlasov-Poisson equation. Even if the technical details are not the point of this story, what I like in these questions is the interaction between several scales: you start from a microscopic description (many particles), and you try to understand what kind of macroscopic behaviour can emerge, and why.

After the PhD my path continued through several moves, and the places I studied and worked in have shaped me in very concrete ways: Paris during the PhD, then Cambridge, then Durham, and finally Zürich, where I am now based at ETH. Before each move there is the application phase, with deadlines and interviews, and with the need to accept that sometimes things simply do not work out; in that period you often do not know in which country, city, or department you will end up next. Then, once you move, the relocation itself is a restart: you build a new routine, you make new friendships, you try to integrate into a new department, and you adjust to a different academic culture. At the same time, I have very fond memories of all the departments where I have worked, and I have kept meaningful contacts in each of those places.

In mathematics, being wrong is normal, because it is part of the creative process, and it is often the only way to understand what is really going on

At times, I also experienced environments that were highly competitive and not particularly welcoming, and, as a woman, I sometimes had the feeling that belonging was conditional; over time I learned not to use that atmosphere as a measure of my value, and to focus instead on good mathematics and collaboration.

Over the years I have also learned something very simple, which I now repeat often to students: in mathematics, being wrong is normal, because it is part of the creative process, and it is often the only way to understand what is really going on. For the same reason, I do not think that speed is a good proxy for depth. What matters more, at least for me, is steady work, genuine curiosity, and the habit of writing and explaining with care, trying to make the argument readable rather than to impress.

(…) I care a lot about creating an atmosphere where asking questions feels natural rather than embarrassing

What I love most about my job is teaching and, more broadly, supporting students and postdocs in their path. I enjoy the moment in which something difficult becomes understandable, and I care a lot about creating an atmosphere where asking questions feels natural rather than embarrassing. When students write to me again after years to tell me about their next steps and their achievements, I feel genuinely fulfilled.

Alongside teaching and mentoring, I also like the research side in a very concrete way: choosing a problem and trying to understand it seriously, reading beautiful mathematics done by others, and writing with care in a way that I would still be happy to read myself a year later. I also enjoy moving between topics and borrowing techniques from different areas, because this often helps me look at a familiar question from a new angle.

Looking back, my path has not been linear, and I changed direction more than once; however, what has stayed constant is curiosity, even when the topics and the places were changing. This is also what I like most about mathematics: there is room for many different trajectories, as long as you keep following questions that genuinely interest you.

Published on February 25, 2026.

Photo credit: Giulia Marthaler Fotografie on behalf of ETH

Posted by HMS in Stories
Christina Runkel

Christina Runkel

Born in Neuwied, Germany • Studied Computer Science at Cooperative State University Mannheim • PhD in Mathematics of Information at the University of Cambridge  • Lives in Oslo, Norway • Postdoctoral Research Fellow at University of Oslo

My interest in mathematics started as a young child and stayed with me throughout my school years. I remember particularly enjoying maths in the final years of school because of our very friendly and motivated teacher. He encouraged me to have a closer look at STEM subjects and maths in particular when trying to decide what to study at university. I could not decide between computer science and maths at first, but ended up doing computer science because of a cooperative study programme that allowed me to study and work at the same time; offering financial stability and practical skills. I ended up working at IBM in Germany where I was lucky enough to be able to choose from a large pool of projects for each of the six internships that were part of the Bachelor’s programme. While mostly focusing on IT consulting internships in my first year, I got the opportunity to work on a research project in a research lab in California in my second year – where I helped to develop new machine learning methods for chat bots – which encouraged me to go more into research for my final two internships, too.

During my Master’s it then became very obvious to me that I really enjoyed doing research and was mostly interested in the maths courses and aspects, which is why I decided to switch to applied maths for my PhD.

While really enjoying the internships that were part of my Bachelor’s programme at the Cooperative State University in Mannheim, I quickly realised that I wanted to get a deeper insight into the „traditional“ student life. My Bachelor’s programme was very structured with little opportunity to choose courses and attendance at lectures was compulsory and I always envied my friends at other universities who had a lot more freedom. Due to the tight connection of my Bachelor’s programme to companies, the curriculum was very applied with little opportunity to do any research. When deciding on a Master’s programme, those ended up being the two main motivations for me to switch to studying a regular computer science degree. During my Master’s it then became very obvious to me that I really enjoyed doing research and was mostly interested in the maths courses and aspects, which is why I decided to switch to applied maths for my PhD. 

Throughout my PhD I always most enjoyed going to workshops and conferences.

Having had the opportunity to combine my Master’s thesis with a research visit in the Cambridge Image Analysis group at the Department of Applied Mathematics and Theoretical Physics in Cambridge, I got a better understanding of the PhD system in the UK and decided to move to England for my PhD. While most PhDs in Germany are tied to a specific project, the prospect of being part of a doctoral training programme which allows for a lot of freedom sounded very convincing to me. Having been funded by a departmental studentship, I got to work on several projects from a broad range of topics like machine learning theory, privacy and security in machine learning, inverse problems and operator learning. Throughout my PhD I always most enjoyed going to workshops and conferences. I was lucky enough to be able to travel to conferences all over the world like Singapore, Japan, the US, Italy and Germany. 

Coming to Cambridge as an international student, I particularly enjoyed being part of a college community with the opportunity to meet people from all over the world and different subjects. While my friend group in both my Bachelor’s and Master’s mainly consisted of people studying computer science, maths and physics, my friend group during my PhD was much more diverse. This is also due to the fact that I started rowing as a new sport when coming to Cambridge which facilitated meeting even more people including undergraduate students of all years.

While I was not interested in image analysis yet at that time, the professor’s enthusiasm for the topic rubbed off on me and motivated me to choose a computer vision project for a one year project that was mandatory as part of my degree. 

Thinking about the most memorable moments of my studies, it was the people who motivated and inspired me most. If it was professors speaking very passionately about a certain subject during lectures or PhD students supervising projects – seeing other people’s interest for the subject always motivated me to keep looking into different fields of maths. I still remember walking into one of my first lectures in my Master’s which was part of a deep learning course. While I was not interested in image analysis yet at that time, the professor’s enthusiasm for the topic rubbed off on me and motivated me to choose a computer vision project for a one year project that was mandatory as part of my degree. 

I also was fortunate enough to have been surrounded by supportive and inspirational people all throughout my Master’s and PhD who encouraged me to go for the next step and believe in myself. Especially as a woman in a very male dominated field, being surrounded by female role models and being supported by both male and female peers and professors made a big difference for me. When starting my PhD, I tried to pass some of this on by being part of mentoring programmes for female and non-binary undergraduates and students. I was both a mentor at the Faculty of Mathematics in Cambridge where we had termly in-person coffee meetings with the mentees and for pupils in Germany via the Cybermentor programme, which offers the opportunity to mentor female and non-binary pupils remotely.  Becoming part of a mentoring scheme is also some of the advice I would give to my 18-year-old self too — to look out for networking opportunities and mentorship programmes; to find people who have chosen a similar path. 

I am now very excited to start my new position as a Postdoctoral Research Fellow at the University of Oslo where I will be continuing to work on developing new methods for machine learning research.

Published on February 11, 2026



Posted by HMS in Stories