### Travel and talks

8^{th}-13^{th} June 2025 - Polylogarithms, homology of linear groups, and Steinberg modules, Les Diablerets.

19^{th}-24^{th} August 2024 - Topology of moduli spaces, Copenhagen.

21^{st}-26^{th} July 2024 - Topologie, Oberwolfach.

15^{th}-19^{th} April 2024 - Columbia University, New York.

8^{th}-12^{th} April 2024 - Namboodiri Lectures in Geometry and Topology, Chicago.

25^{th}-28^{th} March 2024 - Conference, Muenster. (Video)

4^{th}-8^{th} December 2023 - Pontificia Universidad Católica de Chile, Santiago.

26^{th} November-1^{st} December 2023 - Spaces of manifolds: algebraic and geometric approaches, Banff.

17^{th} November 2023 - LMS Annual General Meeting and Presidential Address, London.

30^{th} October-2^{nd} November 2023 - Copenhagen.

24^{th} October 2023 - KCL Geometry Seminar, London.

13^{th} October 2023 - Scottish topology seminar, Glasgow.

4^{th}-6^{th} October 2023 - Panorama of Mathematics II, Bonn. (Slides)

20^{th}-22^{nd} September 2023 - Centenaire de René Thom, IHÉS. (Video)

6^{th}-12^{th} August 2023 - Homotopy Theory, Oberwolfach.

15^{th}-17^{th} May 2023 - Homology of Configuration Spaces and related topics, Paris.

22^{nd} March 2023 - UCL geometry seminar, London.

15^{th} March 2023 - Seminario de topología algebraica y geométrica, Mexico (online).

25^{th} November 2022 - YMSC Colloquium, Beijing (online). (Slides)

3^{rd}-4^{th} October 2022 - Ib Fest, Copenhagen.

26^{th}-30^{th} September 2022 - Clay research conference, Oxford.

12^{th}-16^{th} September 2022 - DMV-Jahrestagung, Berlin. (Slides)

24^{th}-30^{th} July 2022 - Topologie, Oberwolfach.

6^{th}-14^{th} July 2022 - ICM, at satellite event in Copenhagen. (Video, Slides)

27^{th}-30^{th} June 2022 - Homotopy Theory with Applications to Arithmetic and Geometry, Bonn. (Video)

27^{th} May 2022 - Colloquium, Southampton.

16^{th} May 2022 - COGENT Seminar, online.

2^{nd} May 2022 - Topology seminar, Melbourne/online.

13^{th} April 2022 - Colloquium, Princeton/online. (Slides)

7^{th} February 2022 - Johnson homomorphisms and related topics, online.

10^{th} January-12^{th} February 2022 - Higher algebraic structures in algebra, topology and geometry, Stockholm. (Video)

4^{th}-18^{th} December 2021 - Copenhagen.

30^{th} November 2021 - Seminar, Delhi/online. (Slides)

24^{th} November 2021 - Colloquium, Sheffield/online. (Slides)

23^{rd} November 2021 - Johnson homomorphisms and related topics, online.

9^{th} November 2021 - Algebraic Topology seminar, Warwick.

10^{th}-15^{th} October 2021 - Cohomology of Arithmetic Groups, Banff/online. (Slides)

21^{st}-23^{th} September 2021 - The unity of mathematics: A conference in honour of Sir Michael Atiyah, Cambridge. (Video)

5^{th}-7^{th} July 2021 - Operads, Calculus, and Homotopy theory methods in Topology, Lille/online. (Video)

21^{st}-25^{th} June 2021 - Manifolds and K-Theory: the legacy of Andrew Ranicki, online.

23^{rd}-29^{th} May 2021 - Cellular E_{k}-algebras, Oberwolfach/online. (Notes)

14^{th} April 2021 - Building Bridges Seminar, online.

13^{th} April 2021 - Regensburg SFB-Lecture, online. (Slides)

18^{th} January 2021 - Oxford topology seminar, online. (Slides)

9^{th} November 2020 - Muenster topology seminar, online. (Slides)

5^{th} November 2020 - Princeton algebraic topology seminar, online. (Slides)

14^{th} September 2020 - MIT topology seminar, online. (Slides)

27^{th} August 2020 - Copenhagen Centre for Geometry and Topology, online. (Slides)

26^{th}July-1^{st} August 2020 - Topologie, online.

28^{th} April 2020 - Bonn topology seminar, online. (Slides)

9^{th}-15^{th} February 2020 - Manifolds and groups, Oberwolfach.

16^{th} January 2020 - electronic Computational Homotopy Theory Seminar, online. (Video, Slides)

11^{th} October 2019 - Colloquium, Warwick.

7^{th} October 2019 - Colloquium, Durham.

30^{th} September-4^{th} October 2019 - Clay research conference and workshops, Oxford. (Video, Slides)

2^{nd}-6^{th} September 2019 - Automorphisms of Manifolds, Bonn. (Video 1, Video 2)

8^{th}-12^{th} July 2019 - Four Manifolds: Confluence of High and Low Dimensions, Toronto.

24^{th}-28^{th} June 2019 - SYM 10 Years Old, Copenhagen.

15^{th} June 2019 - Séminaire Bourbaki, Paris. (Video, notes)

13^{th}-17^{th} May 2019 - Johnson homomorphisms and related topics, Tokyo.

8^{th}-12^{th} April 2019 - Talbot, McCullough County, TX.

1^{st}-5^{th} April 2019 - Geometry at infinity, Muenster.

5^{th} March 2019 - INteresantísimo SEminario de Geometría y TOpología, Málaga.

13^{th}-20^{th} January 2019 - Harvard.

12^{th} October 2018 - Geometry and Topology seminar, Imperial College, London.

2^{nd}-6^{th} July 2018 - Topologie, Oberwolfach. (Abstract)

18^{th}-23^{rd} June 2018 - Manifolds, Groups, and Homotopy, Skye. (Slides)

15^{th}-16^{th} February 2018 - K-theory, A1-homotopy and quadratic forms, Warwick.

14^{th}-15^{th} December 2017 - Bavarian Geometry and Topology Meeting II, Augsburg.

11^{th}-15^{th} September 2017 - Algebraic Topology of Manifolds, Oxford.

26^{th}-30^{th} June 2017 - Analysis and Topology in Interaction, Cortona.

5^{th}-9^{th} June 2017 - Groups, Manifolds, and K-theory, Muenster.

22^{nd}-26^{th} May 2017 - Johnson-Morita theory and related topics, Tokyo.

20^{th}-21^{st} April 2017 - Moduli and Traces: A celebration of the mathematical life of Ib Madsen, Copenhagen.

3^{rd}-6^{th} April 2017 - British Mathematical Colloquium, Durham.

16^{th} March 2017 - Topology seminar, Queen Mary, London.

13^{th} March 2017 - OAC-manifolds, Oxford.

5^{th}-12^{th} January 2017 - University of Copenhagen.

19^{th}-23^{rd} September 2016 - European Autumn School in Topology, the woods close to Utrecht.

9^{th} September 2016 - OAC-manifolds, Cambridge.

6^{th}-7^{th} September 2016 - TTT, Manchester.

18^{th} July-23^{rd} July 2016 - Topologie, Oberwolfach. (Abstract)

4^{th} July-8^{th} July 2016 - Young Topologists Meeting, Copenhagen.

27^{th} June-1^{st} July 2016 - Topology of manifolds: a conference in honour of Michael Weiss' 60th birthday, Lisbon.

9^{th} May 2016 - OAC-manifolds, Aberdeen.

11^{th} March 2016 - Scottish Topology Seminar, Edinburgh.

22^{nd}-23^{rd} February 2016 - OAC-manifolds, Oxford.

18^{th} February 2016 - Warwick University.

14^{th}-17^{th} December 2015 - Aspects of Homotopy Theory, Southampton.

14^{th} October 2015 - Columbia University.

6^{th} October 2015 - Topology seminar, Stanford University.

4^{th} October-5^{th} December 2015 - Stanford University.

28^{th} September-2^{nd} October 2015 - Manifolds Unlocking Higher Structures, Clay Mathematical Institute Workshop, Oxford.

21^{st} September 2015 - Moduli spaces and their applications, Liverpool.

27^{th} July-21^{st} August 2015 - Hausdorff Centre for Mathematics, Bonn.

29^{th} June-10^{th} July 2015 - PIMS Symposium on the Geometry and Topology of Manifolds, Vancouver.

4^{th}-8^{th} May 2015 - Introductory school: Homotopy theory, manifolds, and field theories, HIM, Bonn. (Video: Lecture 1 / Lecture 2 / Lecture 3)

13^{th}-15^{th} April 2015 - Stockholm.

20^{th}-28^{th} March 2015 - Teichmüller Modular Groups: A Celebration of Nikolai Ivanov's 60th Birthday, Chicago.

23^{rd} February 2015 - Southampton.

19^{th} January 2015 - Oxford.

14^{th}-16^{th} December 2014 - Aberdeen.

15^{th}-20^{th} September 2014 - Topologie, Oberwolfach. (Abstract)

9^{th}-12^{th} August 2014 - ICM Satellite Conference on Algebraic Topology, Dalian, China.

23^{rd}-27^{th} June 2014 - Manifolds, K-theory, and related topics, Dubrovnik.

16^{th}-20^{th} June 2014 - Analysis and Topology in Interaction, Cortona.

9^{th}-13^{th} June 2014 - Summer school, Münster. (Video: Lecture 1 / Lecture 2 / Lecture 3 / Lecture 4)

7^{th}-10^{th} April 2014 - BMC, Queen Mary, London.

27^{th} February 2014, MSRI Research Seminar.

17^{th} February 2014, Rice University.

11^{th} February 2014, Stanford University.

27^{th} January-28^{th} February 2014 - Algebraic Topology programme, MSRI, Berkeley. (Video)

2^{nd} December 2013 - University of Glasgow.

18^{th} November 2013 - University of Manchester.

10^{th}-13^{th} October 2013 - Cohomology of the moduli space of curves, Zürich.

9^{th}-11^{th} September 2013 - British Topology Meeting, Aberdeen. (Slides)

26^{th}-30^{th} August 2013 - Homological stability workshop, Copenhagen.

15^{th}-16^{th} May 2013 - Institut de Mathématiques de Jussieu.

2^{nd} May 2013 - University of Sheffield.

8^{th}-19^{th} April 2013 - Stanford University.

25^{th}-28^{th} March 2013 - BMC 2013, Sheffield.

17^{th}-19^{th} December 2012 - Aspects of Topology, Oxford.

7^{th} December 2012 - Topology seminar, Nottingham.

4^{th}-5^{th} December 2012 - SFB seminar and Algebraic Geometry seminar, Humboldt University, Berlin.

16^{th} November 2012 - Quarterly seminar on Geometry and Topology, Amsterdam.

29^{th} October 2012 - Oxford.

19^{th}-21^{st} October 2012 - XIX Encuentro de Topología, La Coruña. (Slides, Slides in English)

17^{th}-22^{nd} September 2012 - Topologie, Oberwolfach. (Abstract).

6^{th}-8^{th} September 2012 - 27th British Topology Meeting, Cambridge.

20^{th}-26^{th} August 2012 - Arolla. (Slides)

23^{rd}-27^{th} July 2012 - Stanford, Algebraic Topology:Applications and New Directions.

25^{th}-29^{th} June 2012 - Luminy, Homotopical Algebra and Its Applications.

3^{rd}-6^{th} May 2012 - Westfälischen Wilhelms-Universität Münster, 17th NRW meeting.

6^{th}-10^{th} February 2012 - Universitat de Barcelona.

23^{rd}-26^{th} January 2012 - Max Planck Institute for Mathematics.

26^{th}-27^{th} October 2011 - Edinburgh. (Video)

24^{th}-25^{th} October 2011 - Glasgow.

5^{th}-7^{th} October 2011 - ETH.

26^{th}-30^{th} September 2011 - MIT.

3^{rd}-23^{th} July 2011 - "Moduli Spaces of Riemann Surfaces" at the Park City Math Institute, Utah.

2^{nd}-13^{th} May 2011 - Stanford University.

25^{th}-29^{th} April 2011 - "The Kervaire invariant and stable homotopy theory" at the ICMS, Edinburgh.

27^{th}-29^{th} October 2010 - NTNU.

19^{th}-25^{th} September 2010 - Topologie, Oberwolfach. (Abstract).

6^{th}-8^{th} September 2010 - 25^{th} British Topology Meeting, Oxford.

9^{th}-14^{th} August 2010 - West coast algebraic topology summer school, Eugene, Oregon.

1^{st}-8^{th} August 2010 - Stanford University.

11^{th}-24^{th} April 2010 - Stanford University.

23^{rd} March 2010 - Warwick University.

1^{st}-5^{th} February 2010 - University of Copenhagen.

14^{th}-15^{th} September 2009 - 24^{th} British Topology Meeting, Leicester.

8^{th}-11^{th} June 2009 - 25^{th} Nordic and 1^{st} British-Nordic Congress of Mathematicians, Oslo.

24^{th}-30^{th} May 2009 - Manifold Perspectives, Oberwolfach. (Abstract).

11^{th}-15^{th} May 2009 - University of Bonn.

6^{th}-20^{th} January 2009 - Stanford University.

8^{th}-9^{th} December 2008 - University of Sheffield.

18^{th}-24^{th} August 2008 - Third Arolla Conference on Algebraic Topology in Arolla, Switzerland.

23^{rd}-27^{th} June 2008 - "Homotopical Group Theory and Topological Algebraic Geometry Conference" at the Max Planck Institute for Mathematics.

16^{th}-20^{th} June 2008 - "Homotopical Group Theory and Topological Algebraic Geometry Workshop" at the University of Copenhagen.

26^{th}-31^{st} May 2008 - "Topology in the Swiss Alps" Young Topologists' Meeting in Le Châtelard, Switzerland.

21^{st}-25^{th} April 2008 - Westfälischen Wilhelms-Universität Münster.