Talks and seminars
The lists below were last updated April 2024.
Conference talks

 Conference “Spacetime and String Theory”
 Invited talk “String amplitudes: Dotting the i’s and curling the ε’s”
 Santa Barbara, CA, USA (April 2024)
 Kavli Institute for Theoretical Physics, UC Santa Barbara
 Slides, video

 Workshop “QCD Meets EW”
 Invited talk “Landau Singularities Revisited”
 Geneva, Switzerland (February 2024)
 CERN

 SMatrix Bootstrap V Workshop
 Discussion session “Do Androids Dream of Schrödinger’s Cats?
 Les Diablerets, Switzerland (August 2023)
 SwissMAP Research Station

 Conference “From Amplitudes to Gravitational Waves”
 Invited review talk “Formal aspects of scattering amplitudes: Lessons and challenges in 2023”
 Stockholm, Sweden (July 2023)
 Nordic Institute for Theoretical Physics
 Slides

 Strings 2023
 Panel discussion “The Future of the SMatrix”
 Waterloo, ON, Canada (July 2023)
 Perimeter Institute for Theoretical Physics
 Slides

 RADCOR 2023: 16th International Symposium on Radiative Corrections
 Invited talk “Landau Singularities Revisited”
 Crieff, United Kingdom (May 2023)
 Higgs Centre School of Theoretical Physics, University of Edinburgh
 Slides

 Higgs Centre School of Theoretical Physics 2023
 Invited series of lectures “Physics of the Analytic SMatrix”
 Edinburgh, United Kingdom (May 2023)
 Higgs Centre School of Theoretical Physics, University of Edinburgh
 Lecture notes, videos

 Workshop “Tropical and Convex Geometry and Feynman integrals”
 Invited talk “Tropical Geometry of IR Divergences”
 Zurich, Switzerland (September 2022)
 Institute for Theoretical Studies, ETH Zurich

 Amplitudes 2022 Conference
 Invited talk “Three things we’ve learned about infrared divergences this year”
 Prague, Czech Republic (August 2022)
 Charles University
 Slides

 Conference “Bohr100: Current Themes in Theoretical Physics”
 Invited talk “Unitarity Cuts of the Worldsheet”
 Copenhagen, Denmark (August 2022)
 Niels Bohr International Academy, University of Copenhagen
 Slides

 MIAPbP Workshop “Novel Developments in Scattering Amplitudes”
 Invited talk “Unitarity Cuts of the Worldsheet”
 Garching, Germany (July 2022)
 Munich Institute for Astro, Particle and BioPhysics

 Workshop on Nonlinear Algebra and Combinatorics from Physics
 Invited talk “Feynman Polytopes”
 Cambridge, MA, USA (April 2022)
 CMSA, Harvard University

 Smatrix Bootstrap IV Workshop
 Invited talk “What is the $i\varepsilon$ for the Smatrix?”
 Heraklion, Crete, Greece (April 2022)

 Workshop “YOUNGST@RS – Rebuilding the Tower of Babel”
 Invited talk “Doublecopy and unitarity of treelevel string amplitudes”
 Mainz, Germany (April 2022) via Zoom
 Mainz Institute for Theoretical Physics, Johannes Gutenberg University
 Slides

 2022 ChennaiSouthampton Workshop
 Invited talk “What is the $i\varepsilon$ for the Smatrix?”
 Southampton, UK (March 2022) via Zoom
 STAG Research Centre, Southampton University and Center for Strings, Gravitation and Cosmology, IIT Madras
 Slides

 Elliptics ‘21 Conference
 Invited talk “Landau Discriminants”
 Uppsala, Sweden (October 2021) via Zoom
 Uppsala University
 Slides

 DESY Theory Workshop “Bright ideas for a dark universe”
 Invited parallel talk “Landau Discriminants”
 Hamburg, Germany (September 2021) via Zoom
 Deutsches ElektronenSynchrotron (DESY)
 Slides

 Workshop on Celestial Amplitudes and Flat Space Holography
 Panel discussion on celestial amplitudes
 Corfu, Greece (September 2021) via Zoom
 European Institute for Sciences and their Applications
 Slides, video

 Amplitudes 2021 Conference
 Invited talk “Crossing”
 Copenhagen, Denmark (August 2021) via Zoom
 Niels Bohr Institute, University of Copenhagen
 Slides, video

 Strings 2021 Conference
 Invited talk “Subtle Points About Saddle Points in the SMatrix Theory”
 São Paulo, Brazil (June 2021) via Zoom
 ICTP South American Institute for Fundamental Research
 Slides, video

 “Positive Geometries in Scattering Amplitudes and Beyond” Workshop
 Invited talk “Tropical Realizations of the Wilsonian Paradigm”
 Mainz, Germany (June 2021) via Zoom
 Mainz Institute for Theoretical Physics, Johannes Gutenberg University
 Slides

 “California Amplitudes Meeting 2021” Workshop
 Invited talk “Progress on Crossing Symmetry”
 Los Angeles, CA, USA (March 2021) via Zoom
 University of California, Los Angeles
 Notes

 “Geomplitudes II” Workshop
 Invited talk “Stasheff Polytopes, Cosmology, and the Ising Model”
 Davis, CA, USA (February 2021) via Zoom
 QMAP, University of California, Davis
 Notes

 “QCD Meets Gravity VI” Workshop
 Invited talk “Do positionspace observables double copy?”
 Evanston, IL, USA (November 2020) via Zoom
 Northwestern University
 Notes

 “Scattering Amplitudes and Beyond” Online Reunion Conference
 Invited talk “The Sandwich Model”
 Santa Barbara, CA, USA (August 2020) via Zoom
 Kavli Institute for Theoretical Physics, UC Santa Barbara
 DOI, notes, video

 “Recent Developments in Smatrix theory” Conference
 Invited talk “From Moduli Space Localization to AdS Amplitudes”
 Bangalore, India (July 2020) via Zoom
 International Centre for Theoretical Sciences, Tata Institute of Fundamental Research
 Notes, video

 Amplitudes 2020 Conference
 Invited talk “Towards the Geometric ColorKinematics Duality”
 Providence, RI, USA (May 2020) via Zoom
 Brown University
 Slides, video

 “stringtheory.pl/2019” Conference
 Invited talk “Kinematic Jacobi Identity is a Residue Theorem”
 Kraków, Poland (December 2019)
 Jagiellonian University

 “MathemAmplitudes 2019: Intersection Theory & Feynman Integrals” Conference
 Invited talk “Status of Intersection Theory and Feynman Integrals”
 Padova, Italy (December 2019)
 University of Padova
 Slides

 Spacetime and Quantum Mechanics Master Class Workshop
 Invited series of lectures “Aspects of Scattering Amplitudes and Moduli Space Localization”
 Cambridge, MA, USA (October 2019)
 Center of Mathematical Sciences and Applications, Harvard University
 Videos

 “String Field Theory and String Perturbation Theory” Conference
 Invited talk “Scattering Amplitudes from Intersection Theory”
 Florence, Italy (May 2019)
 Galileo Galilei Institute for Theoretical Physics
 Video

 Amplitudes 2018 Conference
 Invited talk “Intersections”
 Menlo Park, CA, USA (June 2018)
 SLAC National Accelerator Laboratory, Stanford University
 Slides, video

 “New Directions in Conventional and Ambitwistor String Theories” Workshop
 Invited talk “Scattering Amplitudes as Intersection Pairings of Twisted Cohomology Groups”
 Waterloo, ON, Canada (April 2018)
 Perimeter Institute for Theoretical Physics

 “QCD Meets Gravity” Workshop
 Invited talk “KLT Relations from Intersection Theory”
 Los Angeles, CA, USA (December 2018)
 Mani L. Bhaumik Institute for Theoretical Physics, UCLA
 Slides

 Amplitudes 2017 Summer School
 Contributed talk “Combinatorics and Topology of Kawai–Lewellen–Tye Relations”
 Edinburgh, UK (July 2017)
 Higgs Centre, University of Edinburgh
 Slides, video

 “Infrared Problems in QED and Quantum Gravity” Workshop
 Invited talk “Soft Theorems from Riemann Spheres”
 Waterloo, ON, Canada (December 2016)
 Perimeter Institute for Theoretical Physics
Invited seminars
 Theory Colloquium, CERN, Geneva, Switzerland (February 2024)
 Colloquium, Perimeter Institute for Theoretical Physics, Waterloo, ON, Canada (January 2024)
 Theory Seminar, Department of Physics, Columbia University, New York, NY, USA (January 2024)
 IAS Amplitudes Group Meeting, Princeton, NJ, USA (November 2023)
 High Energy Physics Seminar, Department of Physics, City College of New York, New York, NY, USA (November 2023)
 Theory Seminar, Department of Physics, Columbia University, New York, NY, USA (November 2023)
 Particle Theory Seminar, Department of Physics, Yale University, New Haven, CT, USA (September 2023)
 Nuclear and Particle Theory Seminar, Center for Theoretical Physics, MIT, Cambridge, MA, USA (September 2023)
 Seminar on Nonlinear Algebra, Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany (July 2023)
 Lectures on Scattering, Max Planck Institute for Mathematics in the Sciences, Leipzig, Germany (July 2023)
 String Theory Seminar, Mathematical Institute, University of Oxford, Oxford, UK (June 2023)
 Cosmology Journal Club, Department of Applied Mathematics and Theoretical Physics (DAMTP), University of Cambridge, Cambridge, UK (June 2023)
 AnLy Strings & Fields seminar, LAPTh Annecy and University of Lyon, Annecy, France (April 2023) via Zoom
 Theoretical High Energy Seminar, McGill University, Montreal, QC, Canada (March 2023) [Slides]
 Worldliners meeting, Online (November 2022) via Teams
 Physics MiniSymposium, University of Michigan, Ann Arbor, MI, USA (October 2022) [Slides]
 String Theory Seminar, DESY, Hamburg, Germany (October 2022) via Zoom [Slides]
 Particle Theory Seminar, Kadanoff Center for Theoretical Physics, University of Chicago, Chicago, IL, USA (October 2022) via Zoom
 IAS Amplitudes Group Meeting, Princeton, NJ, USA (October 2022)
 THColloquium, CERN, Geneva, Switzerland (April 2022)
 Scattering amplitudes journal club at the Max Planck Institute for Physics, Munich, Germany (April 2022) via Zoom
 EPP Theory Seminar, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, USA (April 2022) via Zoom [Slides]
 Amplitudes @ Padova seminar, University of Padova, Padova, Italy (April 2022) via Zoom
 Geometry, Algebra, Physics Seminar, Department of Mathematics, Penn State University, State College, PA, USA (March 2022) via Zoom
 Quantum Fields and Strings Seminar, Department of Applied Mathematics and Theoretical Physics (DAMTP), University of Cambridge, Cambridge, UK (February 2022) via Zoom
 TEP Seminar, Mani L. Bhaumik Institute for Theoretical Physics, UCLA, Los Angeles, CA, USA (February 2022) via Zoom
 Quantum Encounters Seminar, Institut des Hautes Études Scientifiques (IHÉS), BuressurYvette, France (November 2021) via Zoom
 Fields, Strings, Gravity Seminar, Center for Quantum Mathematics and Physics, University of California, Davis, CA, USA (September 2021) via Zoom
 Quantum Spacetime Seminar Series, Tata Institute of Fundamental Research, Mumbai, India (August 2021) via Zoom
 Online seminar on motives and period integrals in quantum field theory and string theory, Paris, France (May 2021) via Zoom [Notes]
 Simons Bootstrap Collaboration Seminar, Stony Brook, NY, USA (May 2021) via Zoom [Video]
 Quantum Fields and Strings seminar, Perimeter Institute, Waterloo, ON, Canada (May 2021) via Zoom [Video]
 Journal club, Centro de Física do Porto, University of Porto, Portugal (April 2021) via Zoom
 Theory seminar, National Institute for Subatomic Physics (Nikhef), Amsterdam, Netherlands (March 2021) via Zoom [Notes, video]
 High Energy Theory Seminar, California Institute of Technology, Pasadena, CA, USA (February 2021) via Zoom
 Joint Theory Seminar, Niels Bohr International Academy, University of Copenhagen, Copenhagen, Denmark (February 2021) via Zoom
 Maths HEP Lunchtime Seminar, Centre for Particle Theory, Department of Mathematical Sciences, Durham University, Durham, UK (November 2020) via Zoom [Notes]
 Geometry and scattering amplitudes journal club, Arnold Sommerfeld Center for Theoretical Physics, LMU Munich, Munich, Germany (November 2020) via Zoom
 Physics group meeting, Institute for Advanced Study, Princeton, NJ, USA (November 2020) via Zoom
 HET Seminar, Leinweber Center for Theoretical Physics, University of Michigan, Ann Arbor, MI, USA (October 2020) via Zoom
 McGill HEP Zoom Talk, McGill University, Montreal, QC, Canada (May 2020) via Zoom
 Journal club talk, Mani L. Bhaumik Institute for Theoretical Physics, UCLA, Los Angeles, CA, USA (February 2020)
 EPP Theory Seminar, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA, USA (February 2020)
 HET Seminar, Mitchell Institute, Texas A&M University, College Station, TX, USA (February 2020) [Video]
 Quantum Field and String Theory Group seminar, Humboldt University, Berlin, Germany (December 2019)
 HET Seminar, New High Energy Theory Center, Rutgers University, Piscataway, NJ, USA (November 2019) [Video]
 High Energy Theory Seminar, Institute for Advanced Study, Princeton, NJ, USA (September 2019)
 Relativity Seminar, Mathematical Institute, University of Oxford, Oxford, UK (August 2019)
 Journal club talk, Centre for Research in String Theory, Queen Mary University of London, London, UK (August 2019)
 TH String Theory Seminar, CERN, Geneva, Switzerland (April 2019)
 Theoretical Physics Group seminar, University of Padova, Padova, Italy (May 2019)
 Theoretical High Energy Seminar, McGill University, Montreal, QC, Canada (February 2019)
 Fields, Strings, Gravity Seminar, Center for Quantum Mathematics and Physics, University of California, Davis, CA, USA (January 2019)
 Quantum Fields and Strings group meeting, Perimeter Institute for Theoretical Physics, Waterloo, ON, Canada (September 2018)
 HET Seminar, Niels Bohr International Academy, University of Copenhagen, Copenhagen, Denmark (September 2018)
 Informal HET Seminar, Institute for Advanced Study, Princeton, NJ, USA (May 2018)
 Fields, Strings, Gravity Seminar, Center for Quantum Mathematics and Physics, University of California, Davis, CA, USA (February 2018)
 Quantum Fields and Strings group meeting, Perimeter Institute for Theoretical Physics, Waterloo, ON, Canada (March 2017)