The Faculty of Mathematics at the Ruhr-Universität Bochum invites applications for the position of a Junior Professor (without tenure track) (m/f/d) for Combinatorics (Salary Scale W 1) to start on as soon as possible. The successful candidate will represent the subject of Combinatorics in research and teaching. Applicants should have demonstrated excellence in an active area of Combinatorics. Preference will be given to applicants working at interconnections of the following fields: enumerative combinatorics, reflections and symmetries, commutative algebra, discrete geometry, matroid theory, convexity and lattices, applications such as the theory of amplituhedra and positive geometry. We are looking for a junior scientist with an internationally visible research profile who complements the existing research expertise and fundings at the Faculty of Mathematics. A close collaboration with the priority program SPP2458 "Combinatorial Synergies" will be expected. The teaching duties will include mathematics courses at undergraduate and graduate level. The teaching load is reduced.

The Faculty of Mathematics at Bielefeld University (joint with MPI MiS Leipzig) invites applications for one PhD position for the project "Convexity and Grassmannians in Statistical Inference" which is a project at the interface of Statistics and Combinatorics. The position will be based at Bielefeld University, but the doctoral researcher will also work for two semesters in the Nonlinear Algebra group at MPI MiS in Leipzig. Applicants should have expertise in one of the following areas and high motivation to learn more about the other area:

• statistics, in particular high-dimensional statistics, algebraic statistics, matrix and tensor methods, and manifold learning

• combinatorics, in particular convex bodies, Grassmannians, matroids, and connections to algebraic geometry

We seek open-minded scholars with an exceptional research record. Strong computational skills are desirable. For our new ERC-Synergy project Universe+, we are especially interested in candidates who are excited about connections with physics.

Applicants should hold, or be about to complete, a doctorate in a relevant mathematical subject area such as algebra or combinatorics. Research experience in asymptotic group theory will be an advantage, but is not essential. The appointee will be required to contribute to the Faculty of Mathematics' teaching portolio (4 hours per week). German language skills are not a necessary requirement, but the ability and willingness to learn German to be able to teach in German after a year is. Support for language tuition is available.

The Max Planck Institute for Mathematics in the Sciences (MPI MiS) is a research center for pure and applied mathematical research located in Leipzig, Germany. The institute is committed to innovative fundamental research, and to transferring concepts and structures from mathematics into other academic fields. The broader scientific environment in Leipzig includes two other Max Planck Institutes (Cognitive Science and Evolutionary Anthropology) as well as the University of Leipzig. For our upcoming research group "Interdisciplinary Frontiers of Algebraic Geometry" led by İrem Portakal, we offer a 3-year PhD position. The expected starting date of the position is January 1st, 2024. We seek outstanding students who enjoy working in a collaborative environment. Applicants should have a degree in mathematics or related fields with an interest in algebra, geometry and computation.

The Institute of Algebra, Number Theory and Discrete Mathematics invites applications for the position of a Research Assistant (Postdoc, m/f/d) in Algebra and/or Combinatorics (Salary Scale 13 TV-L, 100 %).

PostDoc Stelle in der AG Geometrie verfügbar - Sie haben Freude an der Bearbeitung aktueller Forschungsprojekte und bringen sich gerne engagiert in der Lehre ein? Bewerben Sie sich mit einem Forschungsprofil in einem der folgenden Fachgebiete: metrische Geometrie, geometrische Gruppentheorie, algebraische Kombinatorik oder geometrische/kombinatorische Darstellungstheorie

PostDoc position in the research group of Algebra and Discrete Mathematics. Strong background in one or more of the areas discrete and combinatorial geometry, combinatorial commutative algebra, topological, geometric or algebraic combinatorics and discrete mathematics.