#### Erika Nilsson, Financial Officer at Mathematical Sciences

Start date: October 18, 2021

Erika will work as a financial officer with responsibility for accounting, budget, financial follow-ups, projections and financial statements for the Division of Algebra and Geometry and the Division of Analysis and Probability Theory.

Erika has most recently worked as a controller at the Premises Management in the city of Gothenburg.

#### Gerard Freixas i Montplet, Guest Researcher at the Division of Algebra and Geometry

Start date: October 1, 2021

I work in the field of Arakelov geometry, a formalism at the crossroads of complex geometry and number theory, developed since the nineteen seventies as a toolbox for the study of diophantine equations. At the beginning of my career I focused on applications to modular curves and other simple Shimura varieties, and then gradually moved to problems of a more analytical flavour. In recent years, with Dennis Eriksson (Chalmers tekniska högskola and Göteborgs universitet) as my main collaborator, I worked on situations which go beyond the original scope of the theory, such as mirror symmetry for Calabi-Yau varieties, and moduli spaces of vector bundles. During my stay at the mathematics department I plan to pursue my collaboration with Dennis Eriksson and foster the collaboration with other colleagues with common interests.

#### Eusebio Gardella, Senior Lecturer at the Division of Analysis and Probability Theory

Start date: October 1, 2021

I am a Functional Analyst, working primarily on C*-dynamical systems, with interests also in Ergodic Theory, Abstract Harmonic Analysis, as well as the interactions of model theory and descriptive set theory with these areas. In C*-dynamics, I am particularly interested in the structure and classification of amenable group actions on simple, nuclear C*-algebras, and also the rigidity phenomena that actions of nonamenable groups, such as those with property (T), exhibit in this context. Another line of research comes from topological dynamics, where the goal is to relate properties of the dynamical system (such as mean dimension zero) to structural properties of the crossed product (such as Jiang-Su stability).

#### Simon Larson, Postdoctor at the Division of Analysis and Probability Theory

Start date: October 1, 2021

My research is in analysis, mainly focused towards spectral theory of differential operators. I am particularly interested in sharp inequalities, shape optimization problems, semiclassical spectral asymptotics, and the analysis of one-dimensional Schrödinger operators.

I studied Engineering Mathematics at Chalmers from 2009 to 2014. After graduating I got my PhD at KTH and have since then been a postdoc at Caltech.

#### Clemens Weiske, Postdoctor at the Division of Analysis and Probability Theory

Start date: October 1, 2021

My scientific interest is representation theory of Lie groups and applications in related fields, like harmonic analysis and analysis on locally symmetric spaces. More specifically, I am working on branching problems, i.e. on studying the restrictions of representations to subgroups. This phenomenon is also called symmetry breaking in physics and I am working in the setting of unitary representations of real reductive groups. Here branching can be described as integral decompositions, involving certain Fourier transforms.

#### Lars Martin Sektnan, EU Postdoctor (Marie Curie) at the Division of Algebra and Geometry

Start date: September 1, 2021

I work in the field of complex geometry. My main interests include canonical metrics on Kähler manifolds or vector bundles, K-stability, and related notions. A lot of my research focuses on perturbation problems for canonical metrics, where the goal is to construct new such metrics from old ones.

Before coming to Gothenburg, I was a postdoc at Aarhus University (2019-2021) and Université du Québec à Montréal (2016-2019). I did my PhD at Imperial College London, which I completed in 2016.

#### Axel Ringh, Assistant Professor at the Division of Applied Mathematics and Statistics

Start date: September 1, 2021

My research interests are in the intersection of applied mathematics and areas such as control theory, signal processing, inverse problems, and machine learning. In particular, I am interested in computational optimal transport, especially the Sinkhorn iterations and its connections to other areas, and applications of optimal transport. The latter includes problems in formation control, state estimation for ensembles, dynamic flow problems, and various applications in machine learning.

#### Jan Gundelach, PhD student at the Division of Analysis and Probability Theory

Start date: August 17, 2021

Among other things, my research interests include noncommutative geometry, (operator) algebras and stochastic processes. During my studies at the University of Göttingen from 2016 to 2021, I have also put some emphasis on analytic number theory.

In my master’s thesis under the supervision of Ralf Meyer, I interpreted Leavitt path algebras as Cohn localisations and took advantage of this perspective for homological computations.

My PhD project is not pinned down yet, but probably will connect my areas of interest with the consideration of dynamical systems.

#### Sviatlana Shashkova, Researcher at the Division of Applied Mathematics and Statistics

Start date: August 16

I am a researcher at the Cvijovic group. My main scientific interest revolves around clustering of proteins involved in gene expression regulation under various environmental stresses. To address this, I use budding yeast Saccharomyces cerevisiae as a model organism and combine biochemistry and molecular biology methods with super-resolution microscopy tools which allows studying biological processes directly in living cells. I am now combining my experience in microbiology (gained during my PhD at the University of Gothenburg) and single-molecule biophysics (postdoc at the University of York, UK) with mathematical modelling to understand the dynamics of biological systems.

#### Tony Johansson, Guest Teacher at the Division of Analysis and Probability Theory

Start date: August 16, 2021

My research area is discrete probability, focusing more on the combinatorial aspects than the probabilistic.

I was an Engineering Mathematics student at Chalmers from 2008 to 2013, and earned my PhD at Carnegie Mellon University in Pittsburgh, USA. Since then I have had two postdoc positions, with Svante Janson in Uppsala and Tom Britton in Stockholm.

#### Douglas Molin, PhD student at the Division of Algebra and Geometry

Start date: August 16, 2021

I am part of the research group Algebraic Geometry and Number Theory, and I am particularly interested in arithmetic geometry and elliptic curves.

#### Ioanna Motschan-Armen, PhD student at the Division of Applied Mathematics and Statistics

Start date: August 16, 2021

My PhD project will be in the field of computational mathematics, on efficient approximation methods for random fields on manifolds. I will develop and analyze efficient algorithms that approximate nonstationary and anisotropic random fields on Riemannian manifolds to model randomness on curved surfaces.

I have a MSc degree in mathematics from the University of Basel.

#### Mikhail Roop, PhD student at the Division of Applied Mathematics and Statistics

Start date: August 16, 2021

My PhD project "Geometric Hydrodynamics" concerns numerical investigation of 2D incompressible Euler's equations, using the tools from Lie algebra theory and quantum theory.

#### Ai-Linh Nguyen, Financial Officer at Mathematical Sciences

Start date: June 1, 2021

Ai-Linh will work as a financial officer with responsibility for accounting, budget, financial follow-ups, projections and financial statements for the Division of Applied Mathematics and Statistics.

Ai-Linh has most recently worked at Core Facilities at the Sahlgrenska Academy.