Past talks — seminars (external)

• Geometric Group Theory seminar, Cambridge — 21 February 2025. "Vanishing results in the homology of big mapping class groups and Thompson-like groups". Abstract: pdf.
• Topology seminar, Sheffield (alt link) — 19 December 2024. "On the homology of the mapping class group of the Loch Ness monster". Abstract: pdf. Notes: pdf.
• Topology seminar, Aberdeen — 27 November 2024. "On the homology of the mapping class group of the Loch Ness monster". Abstract: pdf. Notes: pdf.
• Algebra seminar, Leeds — 7 May 2024. "Do the dual Miller-Morita-Mumford classes vanish in the homology of the big mapping class group?". Abstract: pdf. Notes: pdf.
• Séminaire d'algèbre et de géométrie, Caen — 5 March 2024. "Représentations homologiques des groupes de tresses soudés et des groupes de difféotopie". Abstract: pdf.
• Séminaire GT3, Strasbourg — 19 February 2024. "Classes d'homologie à support compact pour les groupes modulaires de surfaces de type infini". Abstract: pdf. Notes: English/French.
• International mathematics seminar, Namal University, Mianwali — 18 January 2024. "Configuration spaces and their applications". Abstract: pdf. Slides: pdf. — [Video]
• Séminaire de topologie, Grenoble — 24 November 2023. "The homology of big mapping class groups". Abstract: pdf.
• Group Theory Seminar, ICMAT, Madrid — 14 March 2023. "The homology of big mapping class groups". Abstract: pdf.
• Séminaire de Topologie et Géométrie, Geneva — 9 March 2023. "The homology of big mapping class groups". Abstract: pdf.
• Geometry and Topology seminar, Glasgow — 6 June 2022. "Homological representations of motion groups". Abstract: pdf.
• EPFL Topology Seminar — 31 May 2022. "Homological stability for asymptotic monopole moduli spaces". Abstract: pdf. Notes: pdf.
• Topology seminar, New York University, Abu Dhabi — 30 March 2022. "Mapping class group representations via Heisenberg, Schrödinger and Stone-von Neumann". Abstract: pdf. Slides: pdf. — [Video]
• Fudan Topology Seminar, Shanghai — 10 March 2022. "Mapping class group representations via Heisenberg, Schrödinger and Stone-von Neumann". Abstract: pdf. Poster: pdf. Slides: pdf.
• Algebra/Topology seminar, Copenhagen — 8 October 2021. "On homological representations of mapping class groups". Abstract: pdf.
• Moscow-Beijing topology seminar — 2 December 2020. "On the different flavours of Lawrence-Bigelow representations". Abstract: pdf. Slides: pdf.
• Topology seminar, Purdue University (Indiana) — 21 October 2020. "Homology of configuration-section spaces". Abstract: pdf. Slides: pdf. — [Video]
• Knots and representation theory seminar, Moscow — 7 September 2020. "Reidemeister moves for triple-crossing link diagrams". Abstract: pdf. Slides: pdf. — [Video]
• Topology Seminar, Oxford — 27 April 2020. "On homological stability for configuration-section spaces". Abstract: pdf. Slides: pdf.
• Séminaire de l'équipe Topologie Algébrique, Paris 13 — 12 March 2020. "On homological stability for configuration-section spaces". Abstract: pdf.
• Topology seminar, IMAR — 22 March 2019. "Calculating the stable homology of families of configuration spaces and other moduli spaces, I". Abstract: pdf. (Series abstract: pdf.) [photo]
• GeMAT seminar, IMAR — 21 December 2018. "Reidemeister moves for triple-crossing link diagrams". Extended abstract: pdf. [photo]
• GeMAT seminar, IMAR — 12 October 2018. "Homological stability for partitioned braid groups on surfaces, II". Abstract: pdf.
• Two talks at the GeMAT seminar, IMAR — 23 and 24 August 2018. "Homological stability for symmetric diffeomorphism groups and parametrised connected sum" and "Homological stability for partitioned braid groups on surfaces". Abstracts: first, second.
• GeMAT seminar, IMAR — 13 July 2018. "High-connectivity of complexes of arcs on surfaces and homological stability for mapping class groups". Abstract: pdf.
• Arbeitsgemeinschaft-Seminar, Regensburg — 5 July 2018. "Homological stability for moduli spaces of disconnected submanifolds and symmetric diffeomorphism groups". Abstract: pdf.
• [Paris 7 — 17 May 2018 — audition for MCF position (result: I was shortlisted 5th).]
• Two talks at the GeMAT seminar, IMAR — 5 and 6 April 2018. "Introduction to polynomial functors" and "Introduction to manifold calculus". Abstracts: 5-April, 6-April.
• GeMAT seminar, IMAR — 9 March 2018. "Twisted homological stability for configuration spaces". Abstract: pdf.
• Topology seminar, IMAR — 9 March 2018. "Homological stability for moduli spaces of disconnected submanifolds". Abstract: pdf.
• IMAR — 4 January 2018. "Constructing representations of braid groups à la R. Lawrence". Abstract: pdf. This is part of the GeMAT seminar (Geometric Methods in Algebra and Topology).
• Séminaire Algèbre et topologie, IRMA, Strasbourg — 7 November 2017
• Minicourse (alternative link) consisting of 5 talks at IMAR (Institute of Mathematics of the Romanian Academy) — 10, 14, 31 August and 1, 4 September 2017. Title: Introduction to exotic spheres (based on a lecture course that I gave in Bonn recently). Abstract: pdf. (Note: the first two talks were expanded into three talks in the end, so that the whole course was 5 talks instead of 4.) Photos: 1 2
• Topology seminar, Barcelona — 31 March 2017
• Aberdeen topology seminar — 4 April 2016
• Séminaire de topologie, IMJ-PRG (Paris 6/7) — 1 December 2015
• Séminaire de topologie, Lille — 9 October 2015
• Séminaire de topologie algébrique, Louvain-la-Neuve — 4 June 2015
• Topology seminar, Oxford — 20 April 2015.
• Séminaire de l'équipe Topologie Algébrique, Paris 13 — 26 March 2015.
• Séminaire de Topologie, Géométrie et Algèbre, Nantes — 19 March 2015.
• Aberdeen topology seminar — 25 February 2013
• Manchester topology seminar — 11 February 2013
• Copenhagen topology seminar — 9 January 2012
• Algebra and topology seminar, Swansea — 6 December 2011

(List incomplete before 2013)
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Past talks — seminars (internal) and reading groups

• Leeds Geometry and Analysis Seminar — 19 February 2025. "Homological stability for asymptotic monopole moduli spaces". Abstract: pdf.
• Seminar on homological stability and its applications to number theory, IMAR — 14 August 2024. "Uniform homological stability III: the proof of high-connectivity (continued)". Notes: pdf.
• GeMAT seminar, IMAR — 2 August 2024. "Are there non-zero compactly-supported homology classes on mapping class groups of infinite-type surfaces? Part III". Abstract: pdf.
• Seminar on homological stability and its applications to number theory, IMAR — 31 July 2024. "Uniform homological stability II: the proof of high-connectivity". Notes: pdf.
• Seminar on homological stability and its applications to number theory, IMAR — 26 June 2024. "Uniform homological stability". Notes: pdf.
• Habilitation defence, IMAR, Bucharest — 18 June 2024. Notes: pdf.
• GeMAT seminar, IMAR — 21 May 2024. "Are there non-zero compactly-supported homology classes on mapping class groups of infinite-type surfaces? Part II". Abstract: pdf. Notes: pdf.
• GeMAT seminar, IMAR — 23 January 2024. "Are there non-zero compactly-supported homology classes on mapping class groups of infinite-type surfaces?". Abstract: pdf.
• GeMAT seminar, IMAR — 15 December 2023. "Moments of families of quadratic L-functions via scanning" (an expository talk following the recent preprint with a similar title by Bergström, Diaconu, Petersen and Westerland). Abstract: pdf. Notes: pdf.
• Topology seminar, IMAR — 5 September 2023. "Untwisting Heisenberg homological representations of mapping class groups, II". Abstract: pdf. Notes: pdf.
• GeMAT seminar, IMAR — 2 August 2023. "Untwisting Heisenberg homological representations of mapping class groups, I". Abstract: pdf. Notes: pdf.
• GeMAT seminar, IMAR — 21 April 2023. "Homological stability for asymptotic monopole moduli spaces, II". Abstract: pdf.
• IMAR Monthly Lecture — 19 April 2023. "Stability in the topology of configuration spaces". Abstract: pdf. Notes: pdf.
• GeMAT seminar, IMAR — 6 April 2023. "Homological stability for asymptotic monopole moduli spaces". Abstract: pdf.
• Topology seminar, IMAR — 20 January 2023. "On the lower central series of partitioned surface braid groups". Abstract: pdf.
• GeMAT seminar, IMAR — 13 and 20 January 2023. "Homological stability for Hurwitz spaces and the Cohen-Lenstra conjecture (after Ellenberg, Venkatesh and Westerland)". Abstract: pdf.
• Topology seminar, IMAR — 4 November 2022. "On the lower central series of braid groups and their relatives". Abstract: pdf.
• GeMAT seminar, IMAR — 5 July 2022. "Homological stability for Hurwitz spaces and the Cohen-Lenstra conjecture" (an expository talk following the 2016 paper of almost the same title by Ellenberg, Venkatesh and Westerland). Abstract: pdf.
• GeMAT seminar, IMAR — 2 June 2022. "The homotopy type of the cobordism category" (an expository talk following the 2009 paper of the same title by Galatius, Madsen, Tillmann and Weiss). Abstract: pdf. Notes: pdf.
• GeMAT seminar, IMAR — 14/24 March and 8 April 2022. "Spectrification of Khovanov homology". Abstract: pdf. Notes: talk 1, talk 2, talk 3, combined.
• Topology seminar, IMAR — 12 November 2021. "Mapping class group representations via Heisenberg and Schrödinger". Abstract: pdf. Notes: pdf.
• GeMAT seminar, IMAR — 7/13/28 May and 4/11 June 2021. "Moduli spaces of high-dimensional discs (after Watanabe, Weiss, Kupers and Randal-Williams)". Abstract: pdf. Notes: Part 1, Part 2, Part 3, Part 4, Part 5, Combined.
• Low-dimensional topology group meeting, Oxford — 18 May 2021. "Representations of the Torelli group via the Heisenberg group". Slides: pdf.
• Reading seminar, Oxford — 16 February 2021. "Signature invariants related to the unknotting number". (Following Charles Livingston's paper 1710.10530 of the same name.) Slides: pdf.
• Topology seminar, IMAR — 22 and 29 January 2021. "Lower central series of braid-like groups". Abstract: pdf. Slides: Part 1, Part 2.
• Topology advanced class, Oxford — 7 December 2020. "Manifold calculus and exotic Pontrjagin classes". (Essentially following Michael Weiss' paper 1507.00153.) Slides: pdf.
• Topology seminar, IMAR — 30 October 2020. "Homology of configuration-section spaces". Abstract: pdf. Slides: pdf.
• GeMAT seminar, IMAR — 12/19 June and 3/10/17 July 2020. "Kontsevich characteristic classes à la Watanabe". A series of expository talks on the paper of T. Watanabe: Some exotic nontrivial elements of the rational homotopy groups of Diff(S⁴) (following a similar series of talks that I gave recently at a reading seminar at Oxford). Notes: Part 1, Part 2, Part 3, Part 4, Part 5.
• Low-dimensional topology reading seminar, Oxford — 12/19 May and 9/16 June 2020. "Kontsevich characteristic classes à la Watanabe". Four talks following the paper of T. Watanabe: Some exotic nontrivial elements of the rational homotopy groups of Diff(S⁴). Notes: Part 1, Part 2, Part 3, Part 4.
• GeMAT seminar, IMAR — 10 April 2020. "On motivic cohomological stability for configuration spaces". Abstract: pdf. Slides: pdf.
• Topology seminar, IMAR — 31 January 2020. "On homological stability for homological representations of braid groups, surface braid groups and loop braid groups". Abstract: pdf.
• Topology seminar, IMAR — 20 December 2019. "Functorial homological representations of motion groups and mapping class groups, polynomiality and twisted homological stability". Abstract: pdf.
• GeMAT seminar, IMAR — 11 December 2019. "Constructing homological representations of motion groups and mapping class groups". Abstract: pdf.
• GeMAT seminar, IMAR — 27 November 2019. "On bases and reducibility for the Lawrence-Bigelow representations of the braid groups". Abstract: pdf.
• GeMAT seminar, IMAR — 8 November 2019. "On homological stability for Hurwitz spaces and configuration-mapping spaces".
• Topology seminar, IMAR — 11 October 2019. "On homology of configuration-section spaces".
• GeMAT seminar, IMAR — 12 September 2019. "Calculating the stable homology of families of configuration spaces and other moduli spaces, IV". Abstract: pdf. (Series abstract: pdf.)
• GeMAT seminar, IMAR — 31 May 2019. "Calculating the stable homology of families of configuration spaces and other moduli spaces, III". Abstract: pdf. (Series abstract: pdf.)
• GeMAT seminar, IMAR — 26 April 2019. "Calculating the stable homology of families of configuration spaces and other moduli spaces, II". Abstract: pdf. (Series abstract: pdf.)
• Topology seminar, Bonn — 9 May 2017
• Paris 13 — 3 March 2016 — a talk at a groupe de travail on the chain rule in Goodwillie calculus
• IHP, Paris — 25 January 2016 — a talk at a groupe de travail on the paper of S. Sam and A. Snowden Gröbner methods for representations of combinatorial categories.
• Paris 7 — 19 January 2016 — a talk at a groupe de travail on the blob complex.
• Leray reading seminar (Münster) on Functor Calculus — 14 April 2015.
• Leray reading seminar (Münster) on Functor Calculus — 25 February 2015 — [Notes].
• Münster Leray seminar — 29 January 2015, "Twisted group-completion and oriented configuration spaces" (about joint work with Jeremy Miller on a version of the McDuff-Segal group-completion theorem for homology with twisted coefficients, and an application of this to the homology of "oriented configuration spaces")
• Münster Topology Oberseminar — 26 January 2015. I talked about the group-completion theorem and its role in the proof of the main theorem of [Galatius-Randal-Williams, "Stable moduli spaces of high-dimensional manifolds"]. This was part of a thematic semester for the Oberseminar, focusing on the results of this paper.
• Münster Leray seminar — 30 May 2014 (joint talk with Federico Cantero)
• Münster Leray seminar — 24 October 2013
• Münster, Oberseminar Topologie — 27 May 2013
• Oxford Kinderseminar — 23 January 2013, "Flexagons"

(List incomplete before 2013)
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• List of preprints on the arXiv
• Google Scholar
• MathSciNet
• Zentralblatt
• ORCID
• ResearchGate
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• Manifold Atlas Project