Talks

At conferences/summer schools etc.:

2026

• The Spherical Hopf Algebra at Groups and Geometry in North-Rhine Westphalia, April 30, Universität Münster, Münster, Germany

• The Motivic Alexander Module at Mini-Topology-Workshop, March 16, Universität Osnabrück, Osnabrück, Germany

2025

• Higher Spherical Scissors Congruence (joint talk with Josefien Kuijper and David Mehrle) at Scissors Congruence and K-theory, July 14, University of Pennsylvania, Philadelphia, Pennsylvania, USA

• Algebraic Knots from a Motivic point of view at Séminaire Algèbre et géométries, March 10, Institut Fourier, Grenoble, France

2024

• From Operations on Milnor-Witt K-theory to Motivic Knot Invariants at 34th NRW topology meeting, November 22, Universität Bielefeld, Bielefeld, Germany

• Higher Spherical Scissors Congruence (joint talk with Josefien Kuijper and David Mehrle) at Collaborative Workshop in K-theory and Scissors Congruence, August 02, VU, Nashville, Tennessee, USA

• From Operations on Milnor-Witt K-theory to Motivic Knot Invariants at PCMI 2024 Research Program: Motivic Homotopy Theory, July 26, PCMI, Park City, Utah, USA 

• From Operations on Milnor-Witt K-theory to Motivic Knot Invariants at Oberseminar Topologie, June 19, Universität Münster, Münster, Germany

2023

• Operations between certain Motivic Stable Homotopy Sheaves of Spheres at Young Topologists Meeting 2023, July 25, EPFL, Lausanne, Switzerland

• Operations between various Homotopy Modules at Homotopy theory, K-theory and trace methods, July 06, Radboud University Nijmegen, Nijmegen, Netherlands

• Motivic Cohomology and Motives (teXed version here: Motivic Cohomology and Motives teXed) at Talbot 2023: Computations in motivic stable homotopy theory, June 05, The Shire in the woods, McGrath, Minnesota, USA

• Operations on Milnor-Witt K-theory at Oberseminar Algebra und Topologie, January 11, BUW, Wuppertal, Germany

2022

• Motivic Poincaré Series and Stratifications at Grothendieck ring and Derived category: a gathering, April 27, Università di Torino, Turin, Italy

2021

• Motivic point counting at London Junior Number Theory Seminar, June 01, Imperial College London, Online

2020

• Making the p-adic's motivic at 2020 Summer Tropical Algebraic Geometry Online SeminAUR (STAGOSAUR): Top Weight Cohomology of Moduli Spaces of Curves, July 21, Online

• Moduli space of stable curves at 2020 Summer Tropical Algebraic Geometry Online SeminAUR (STAGOSAUR): Top Weight Cohomology of Moduli Spaces of Curves, July 03, Online

At local seminars etc.:

2026 

• Applications to Oriented Grassmannians at Oberseminar Topologie (on Chow-Witt-Rings with Applications to the Geometry of Grassmannians), June 10, Universität Osnabrück

• An Invariant of Algebraic Knots at Oberseminar Algebra, April 15, Universität Osnabrück

2025 

• The Homogeneous Spectrum of Milnor-Witt K-theory of a Field at Oberseminar Topology (on Chromatic Motivic Homotopy Theory: Balmer Spectra of Motivic Categories), November 24, Universität Osnabrück

• Stable Results at Oberseminar Topology (on Motivic and Real Étale Homotopy Theory), July 02, Universität Osnabrück

• Stable Power Operations of Ordinary Mod p Cohomology at Oberseminar Topology (on The Motivic Sphere in Non-A^1-invariant Motivic Homotopy Theory and Stable Power Operations), February 26, Universität Osnabrück

• Cohomology Operations at Oberseminar Topology (on The Motivic Sphere in Non-A^1-invariant Motivic Homotopy Theory and Stable Power Operations), January 29, Universität Osnabrück

2024

• Affine Algebraic Groups are Linear at Oberseminar Algebraic Geometry (on Algebraic Groups), April 29, HHU Düsseldorf

2023

• Algebraic Stacks at Oberseminar Algebraic Geometry (on the Irreducibility of the space of curves), December 11, HHU Düsseldorf

• Knot (and Diagram) Quandles at Oberseminar on Algebra and Geometry (on Knots and Quandles), June 23, HHU Düsseldorf

• Operations on Milnor-Witt K-theory at Advanced Seminar on Group Theory (Research talks), May 02, HHU Düsseldorf

• Chern Classes und K_num at Oberseminar Algebraic Geometry (on Bridgeland Stability Conditions), April 17, HHU Düsseldorf

2022

• Néron-Severi Group and Mordell-Weil Lattice at Oberseminar Algebraic Geometry (on Elliptic Surfaces), December 05, HHU Düsseldorf

• (Operations on) Milnor-Witt K-theory at Oberseminar Model Theory (Research talks), November 22, HHU Düsseldorf

• Motivic Integration at Oberseminar Algebraic Geometry (on Motivic Integration), June 20, HHU Düsseldorf

• Classifying Topoi I at Oberseminar Model Theory (on Topos Theory), June 01, HHU Düsseldorf

2021

• Systems of Topologies at Oberseminar Model Theory (on the Étale-open Topology and Stable Large Fields), November 16, HHU Düsseldorf

• Derived Category and Canonical Bundle I: The Reconstruction Theorem of Bondal and Orlov at Oberseminar Algebraic Geometry (on Derived Categories of Coherent Sheaves), November 15, HHU Düsseldorf

• The What, Why and Where of a poor human's Motive (aka playing with scissors in Algebraic Geometry) at Non-professor meetings of the GRK2240 Workshop, November 11, HHU Düsseldorf

2020

• Triangulated Categories and Localization at GRK2240 Workshop (on Tensor-Triangular Geometry), May 05, Online

2019

• Motivic Integration and the Motivic Monodromy Conjecture at Non-professor meetings of the GRK2240 Workshop, December 05, BUW Wuppertal