A list of all seminars of interest to us in the area is here:
Event page of the Kolleg Mathematical Physics Berlin
Organised by Dirk Kreimer and his group:
Our research seminar
On Mondays, 15.00
Room 2’07, IRIS Building, Zum Großen Windkanal 6 (Zoom, at present)
12489 Berlin
Winter 21/22  

November 22  Andreas Maier (DESY Zeuthen)  Binary Black Hole Systems at the Fifth PostNewtonian Order  
November 29  David Prinz (HU) and Alexander Schmeding (Bergen U)  Lie Theory for Asymptotic Symmetry Groups in General Relativity  
December 13  Johannes Bluemlein (DESY Zeuthen)  Polarized and Unpolarized 3loop anomalous dimensions in QCD  
December 20  Erik Panzer (Oxford U)  Combinatorial Feynman period invariants  
January 17  Marko Berghoff (Oxford U & HU)  From gauge theory quantization to independence complexes of graphs  
January 24  John Gracey (Liverpool U)  Infrared propagators in QCD  
January 28(!)  Gabriele Travaglini (Queen Mary)  QFT Kolloquium: From scattering amplitudes to Newton’s potential and beyond  
February 07  Christoph Nega (Bonn U.)  CalabiYau Manifolds and Feynman Integrals — The Family of Banana Graphs  
February 14  Dirk Kreimer (HU)  Bananas: multiedge graphs and their Feynman integrals  
February 18(!)  Maxwell Hansen (Edinburgh U.)  QFT Kolloquium: tba  
February 21  Michael Borinsky (ETH Zürich)  tba  
Summer 21  
April 19  Rene Klausen (HU)  Kinematic singularities of Feynman integrals via GKZ hypergeometric systems  
April 30 14:00  QFT Collquium: Emanuel Malek (HU)  Exceptional Field Theory and applications to the AdS/CFT correspondence  
May 03  David Prinz (HU)  Gravitational Slavnov–Taylor Identities and Hopf Ideals  
May 10  Johannes Thürigen(Münster)  Algebraic structure in renormalization of combinatorially nonlocal field theories  
May 17  Marko Berghoff (Oxford and HU)  The analytic structure of parametric Feynman integrals  
May 25  Physics Inst. Colloquium Laurent Lellouch (CPT)  Muon g2: experiment, standard model and lattice quantum chromodynamics  
June 07  Alexander Schmeding (Bergen, Norway)  Character groups of Hopf algebras from renormalisation as Lie groups  
June 14  John Gracey (Liverpool)  The WessZumino model at five loops  
June 21  Walter van Suijlekom (Nijmegen)  Higher ChernSimons and YangMills forms in the spectral action  
June 25 at 2pm  QFT Kolloquium: Lorenzo Magnea (Torino U.)  The infrared structure of perturbative QCD  
June 28  Gudrun Heinrich (KIT)  Multiloop integrals and asymptotic expansions  
July 05  Ben Ruijl (ETH Zürich)  Local Unitarity: a representation of differential crosssections that is locally free of infrared singularities at any order  
Winter 20/21  
Nov 16  IHES  Conference: Algebraic Structures in pQFT  
Nov 23  canceled    
Nov 27  QFT Kolloquium: Harvey Meyer  The hadronic contributions to the anomalous magnetic moment of the muon  
Nov 30  Loic Foissy  Twisted Hopf Algebras  
Dec 07  Raimar Wulkenhaar (Münster)  tba  
Dec 14  Ali Mahmoud  tba  
Dec 16 14:00  QFT Kolloq: Johanna Erdmenger  tba  
Jan 11  Gerald Dunne  tba  
Jan 18  Michael Borinsky (NIKHEF)  tba  
Jan 25  Paolo Benincasa (NBI)  tba  
Jan 29  QFT Kolloquium: Pierpaolo Mastrolia  tba  
Feb 08  Alex Hock (Muenster)  tba  
Feb 26(!)  Gaetan Borot (HU)  QFT Kolloquium  
Summer 2020  
May 04  Michael Borinsky (NIKHEF)  Fast Feynman parametric integral evaluation via tropical sampling  
May 11  Konstantin Wernli (Notre Dame)  (Generalized) Hamilton Jacobi action in QFT  
May 18  Henry Kissler (HU)  A diagrammatic anatomy of quantum EH gravity  
May 29(!)13:30  QFT Kolloquium: Giulia Zanderighi (MPI Munich)  Precision at the LHC: why and how  
June 08  Ralph Kaufmann (Purdue)  tbd  
June 15  Yvain Bruned (Edinurgh)  tbd  
June 22  John Gracey (Liverpool)  tbd  
July 06  Kurusch EbrahimiFard (NTNU, Norway)  tbd  
July 14(!)  KMPB Day!  tbd  
Winter 19/20  
October 21  Marko Berghoff  What is a graph complex?  
November 04  Johannes Brödel  Amplitude recursions with an extra marked point  
November 11  Olaf Müller  Loose ends in quantization  
November 18  Johannes Thürigen / WMU Münster  Locality in combinatorially nonlocal field theories: the Hopf algebra of 2graphs  
November 25  David Broadhurst / Open Univ.  Triangle, kite and tetrahedron diagrams  
December 02  John Gracey /Liverpool  Bilinear quark operator renormalization and $\gamma^5$  
December 09  Marko Zivkovic / Univ. Luxembourg  Graph complexes: quasiisomorphisms and extra differentials  
December 16  Karen Vogtmann /Warwick Univ.  Outer space for rightangled Artin groups  
Summer 19  
April 01  Mathias Schulze (U.Kaiserslautern)  Polynomials associated to graphs, matroids, and configurations  
April 10  KMPB Day  c2 invariant meets rook theory  
April 15  Karen Yeats (U.Waterloo and HU)  K5  
April 29  Ian Jack (U.Liverpool)  The atheorem, scheme invariants and Hopf algebras  
May 06  Andreas Maier (DESYZeuthen)  Binary black hole systems in a nonrelativistic effective theory  
May 17 (!)  Eran Palti (MPP, Munich)  The Swampland and Emergence  
May 20  Dirk Kreimer (HU)  Invariant Periods  
May 27  Marcel Golz (HU)  tba  
June 03  QFT Colloquium  tba  
June 17  John Gracey (U.Liverpool)  Constructing infrared gluon propagators using gluon mass and Gribov copies  
June 24  Konstantin Wernli (Zuerich U.)  On Locality and Renormalization in perturbative QFT  
July 01  QFT Colloquium  tba  
July 08  Julian Purkart(HU)  tba  
Winter 2018/19  
October 15  dies academicus  —  
October 22  Dirk Kreimer  Coactions from Cubical Chain Complexes  
October 29  Roman Zwicky (Edinburgh)  On RGflow Theorems in d=4.  
November 12  Karen Yeats (U.Waterloo & HU)  Some computational results on the c_2 invariant.  
November 13  QFTKolloquium: Prof. Dr. Niklas Beisert (ETH Zuerich)  Yangian Symmetry and Integrability of Planar N=4 SYM  
November 19  John Gracey (U.Liverpool & HU)  Focus on fixed points and emergent symmetries in scalar, fermion and gauge theories 

December 03  David Prinz (HU)  Gauge Symmetries and Renormalization  
December 10  Nima Moshayedi (U.Zuerich)  The modified differential Quantum Master Equation  
December 17  Erik Panzer (Oxford)  Solution of phi^4 theory on the 2dimensional Moyal plane  
January 08  QFTKolloquium: Prof. Dr. Lance Dixon (SLAC)  Bootstrapping Amplitudes in Planar N=4 SuperYangMills Theory  
January 14  Kurusch EbrahimiFard (NTNU, Norway)  Relations between monotone, boolean and free cumulants  
January 28  Michael Borinsky (NIKHEF)  The Euler characteristic of outer space  
February 04  Loic Foissy (U.Littoral Cote d’Opale)  tba  
February 05  QFTKolloquium: Prof. Dr. Karen Yeats (Waterloo)  tba  
February 11  Julian Purkart (HU)  postponed to summer 2019  
Summer 2018  
April 16  dies academicus  —  
April 23  David Broadhurst (Open U.)  Periods and quasiperiods in QFT  
April 30  Conference  LL 2018  
May 07  defense Olof Ahlen – IRIS, R. 2.07  tba  
May 14  Pierre Clavier (U.Potsdam)  Resurgence theory and mass generation  
May 21  tba  public holiday  
May 28  Marcel Golz  tba  
June 04  Les Houches  Houches QFT school  
June 11  Les Houches  Houches QFT school  
June 18  Experiences Les Houches Workshop  tba  
June 25  Konrad Schultka (HU)  Toric Varieties and Feynman Graphs  
July 02  Kay Schoenewald (DESY)  3loop corrections to deep inelastic scattering with two different masses 

July 09  Dirk Kreimer  tba  
Winter 2017/18  
October 16  dies academicus  —  
October 23  Zeuthen KMPB conference  Elliptic Integrals, Elliptic Functions and Modular Forms in Quantum Field Theory  
November 06  Iain Crump (SFU&Waterloo U.)  Connections between the EGP and the c2 invariant  
November 13  Marko Berghoff (HU)  Feynman amplitudes on moduli spaces of graphs  
November 20  Christian Bogner (HU)  The analytic continuation of the sunrise and the kite integral  
November 27  Michael Borinsky (HU)  > Hopf algebras and factorial divergent power series: Algebraic tools for graphical enumeration 

December 04  Johannes Thuerigen (HU)  Critical behaviour of Tensor models  
December 11  Valentina Forini (City Univ. London)  Superstring worldsheet beyond perturbation theory  
December 18  Erik Panzer (All Souls College, Oxford)  Counting master integrals with parametric annihilators  
December 19  KMPB Day 9.30 10.45 14.00 
ZGW 6, IRIS R. 2.21 Viktor Levandovskyy (RWTH Aachen): Annihilator of f^s: theory and computation Yang Zhang (ETH Zuerich): Module intersection method and Feynman integral reduction Mikhail Kalmykov (Hamburg): Hypergeometric functions and massive Feynman diagrams. 

January 15  David Jarossay (Geneva)  padic multiple zeta values and prounipotent harmonic actions  
January 22  Daniela Cadamuro (TUM)  Lower bounds for the energy density in quantum integrable models  
January 29  Yang Zhang (ETH Zuerich)  Cristal: A new efficient integrationbyparts (IBP) program based on module intersection  
February 05  Dirk Kreimer (HU)  Multivalued Feynman Graphs  
February 12  Johannes Bluemlein (Desy Zeuthen Theory)  Elliptic Integrals in Higher Loop Calculations – from IBPs to \etaweighted elliptic polylogarithms 

Summer 2017  
April 24  Franz Herzog (NIKHEF)  The R*operation for generic euclidean Feynman graphs  
April 25 (!)  Franz Herzog (NIKHEF)  The 5loop beta function in QCD  
May 08  Dirk Kreimer (RUD25 1’327)  Remainder terms  
May 15  Marko Berghoff  Amplitudes on the moduli space of graphs  
May 22  Henry Kissler  QED at higher dimensions  
May 29  Karen Yeats (U.Waterloo, Canada)  The c_2 invariant at p=2 graphically  
June 12  Ralph Kaufmann (Purdue U.)  Feynman categories and moduli: decorated, derived and cubical  
June 15 !! RUD25, 1.315 4 pm !! 
Noriko Yui (Queen’s Univ., Canada & MPIM, Bonn)  Modularity/Automorphy of certain Calabi–Yau Varieties of CM type  
June 26  Astrid Eichhorn (Heidelberg)  The status of asymptotic safety for quantum gravity  
July 03  KMPB day  Oliver Schnetz (FAU ErlangenNuernberg), Karen Yeats (U.Waterloo & HU), Ralph Kaufmann (Purdue & HU)  
July 10 IRIS, 2.21 ! 
KMPB conference  Higgs Bundles, K3 Surfaces and Moduli  
July 17  Claire Glanois  An eye on Modular forms and Periods  
Winter 2016/17  
October 31.  Dirk Kreimer  Remarks on Cutkosky rules and Field Diffeomorphisms  
November 07.  no seminar  Professorium Physik  
November 14  Henry Kissler  On gauge dependence  
November 21.  Michael Borinsky  Asymptotic growth of periods  
November 28.  Marcel Golz  Simplifying the parametric Feynman integral in QED  
Dec 05.  Marko Berghoff  On Outer Space  
December 12  Luise Adams (Mainz U.)  The sunrise and the kite integral in terms of an elliptic generalisation of the multiple polylogarithms  
December 15 (special seminar RUD25)  Dmitry Doryn (IBSCGP, Pohang)  Differential models for Btype openclosed topological LandauGinzburg theories  
January 09  Matteo Rosso (HUB)  Yangian invariance of N=4 superYangMills and ABJM  
January 16  IMPRS Lecture Day  AEI  
January 30  Thomas Willwacher (ETH Zuerich)  Graph complexes and configuration spaces: an overview  
February 20.  KMPB Day  Martin Gonzalez: Axel Kleinschmidt: Federico Zerbini: 
Summer 2016  

April 18. 14.30  Dirk Kreimer  Field Diffeomorphisms and Green’s functions 
April 25.  …  .. 
May 02.  Karen Yeats (SFU)  Field diffeomorphisms and Bell polynomials. 
May 10.  Nils Matthes (KMPB)  Elliptic double zeta values and the Fayshuffle space 
May 19.  Nils Matthes (KMPB)  The motivic coaction for elliptic multiple zeta values 
May 30.  Franz Herzog (NIKHEF)  Soft Expansion by Region and Higgs Production 
June 13  Erik Panzer Oxford  The Hepp bound – a rational period 
June 20  KMPB day  Michael Borinsky : Factorially divergent expansions from a QFT perspective Oliver Schnetz : Numbers and Functions in Quantum Field Theory Christian Bogner : Multiple and elliptic polylogarithms for Feynman integrals 
July 04  Sophia Borowka Zuerich Univ.  Numerical evaluation of multiloop integrals in Higgs boson pair production 
July 11  Kurusch Ebrahimi Fard ICMAT  A diagrammatic description of planar functional calculus 
July tba.  Dmitry Doryn  The c_2 invariants of 4regular graphs. 
July 18.  ECM Congress in Berlin  .. 
Winter 2015/16  
October 19.  Dirk Kreimer  .. 
October 26.  Nguyen Viet Dang Lille  Complex powers of analytic functions and renormalization in QFT 
November 02.  Pierre Cartier IHES  padic multizeta values (according to David Jarossay) 
November 09.  David Broadhurst Open Univ.  Modular periods from determinants of Feynman integrals 
November 16.  Johannes Brödel HU Berlin  Elliptic multiple zeta values and a special derivation algebra 
November 23.  Anton Mellit Trieste  A proof of the shuffle conjecture 
November 30.  Erik Panzer All Souls College/ Oxford  The parity theorem for multiple polylogarithms 
December 07.  Joachim Kock Barcelona  Polynomial functors and combinatorial Dyson–Schwinger equations 
December 14.  Ines Aniceto Krakau  Resurgence and Asymptotics in Quantum Theories: Beyond Perturbation Theory 
January 11., 2016  Oliver Schnetz Erlangen  Dimreg phi^4 with graphical functions 
January 18., 2016  John Gracey Liverpool  Higher dimensional gauge theories 
January 25., 2016  Lorenzo Tancredi Karlsruhe  The role of the spacetime dimensions in simplifying systems of differential equations for Feynman Integrals. 
April 20.  Dirk Kreimer  Cutkosky rules and outer space 
April 27.  Nils Matthes Univ Hamburg  Elliptic analogues of multiple zeta values 
May 11.  Olaf Kruger MPI Golm  Filtrations in DysonSchwinger equations: Nextto^{j}leading log expansions systematically 
May 18.  Dmitry Doryn MPI Mathematik Bonn  Some remarks on motivic denominator reduction 
June 8.  Ralph Kaufmann Purdue  Hopf algebras from cooperad structures and Feynman categories and their relation to Tannakian categories 
June 15.  Francis Brown Oxford Univ.  Irrationality proofs for zeta values and dinner parties 
Fri June 26. 11 am 
Oliver Schnetz Univ. Erlangen  The Galois coaction and the structure of phi4 periods 
June 29.  Mikhail Kalmykov Hamburg  Evaluation of Feynman Diagrams via hypergeometric functions representation 
Tue. July 7  SFB 647 Seminar: Ralph Kaufmann Purdue Francis Brown IHES/Oxford 
Feynman categories
From amplitudes to representations 
Wed July 8 11 am 
Iain Crump SFU Burnaby  An invariant from incidence matrix permanents 
July 13.  Reimar Wulkenhaar Univ. Münster  A solvable quantum field theory in 4 dimensions 
Wed July 15 1 pm room 3.007 
Clermont Dupont MPI Bonn  Purity for Brown’s moduli spaces, and the Gravity operad 
Winter 2014/15  
Nov 03  Roberta Iseppi Radboud University Nijmegen  The BV Formalism in the setting of Noncommutative Geometry: application to a U(2)gauge invariant matrix model 
Nov 10  David Broadhurst Open Univ.  Polylogarithms of sixth roots of unity in quantum field theory 
Nov 17  Pierre Clavier Jussieu  Singularities and zetas in a SchwingerDyson equation 
Nov 24  Piotr Tourkine DAMTP Cambridge  Tropical Amplitudes 
Dec 01  Pierre Cartier IHES  Motivic Periods 
Dec 08  Costas Papadopoulos NCSR “Demokritos” Athen  Twoloop Master Integrals with the Simplified Differential Equations approach 
Dec 15  Markus Hihn HUB  .. 
Jan 12  Jacelyn Bell University of Liverpool  Vertex functions in QCD – a practical approach 
Jan 19  Joseph Ben Geloun MPI Potsdam  On the dimensional regularization and renormalization of rank=2 and 3 tensor models 
Jan 26  Daniela Egas Univ. Bonn  Comparing combinatorial Models of the Moduli space of Riemann surfaces 
Jan 27, 2 pm  Norman Sieroka ETH Zuerich  Gauge Principle and Holography — Two contemporary concepts and their prehistory and philosophical background in the work of Hermann Weyl 
Feb 09  Ulf Kühn Hamburg  Multiple Eisenstein series and a new class of multiple qzeta values 
PhD student seminar on Campus Leben (organizer: Dirk Kreimer)
Every other Thursday, 13.00 st
Bernstein Center, Haus 6, Philippstr. 13 (Zoom, at present)
Summer 2014  

April 07  Andreas Windisch Graz 
Nonperturbative properties of Landau gauge QCD correlation functions at vanishing and nonvanishing chemical potential 
April 15  Alexander Alexandrov FRIAS 
Matrix Models: a universal tool of mathematical physics 
May 05  Isabella Bierenbaum Hamburg 
From Loops to Trees via the Duality Method 
May 12  David Broadhurst open U. 
Algebraic geometry informs quantum field theory 
May 19  Gerald Dunne Connecticut 
Resurgent Transseries from Uniform WKB 
May 26  Ralph Kaufmann MPIM Bonn 
Feynman, Hopf, Rota and Baxter. 
June 02  Andreas von Manteuffel Mainz 
Feynman integrals for ZZ production at NNLO 
June 23  Frederic Fauvet Strasbourg 
Resurgence monomials 
June 30  Burkhard Eden HU Berlin 
Constructing sixpoint NMHV correlators and amplitudes in N=4 SYM 
July 07  Francis Brown Jussieu 
tba 
July 14  Oliver Schnetz Erlangen/Berlin 
Phi^4 periods with 6th roots of unity 
Winter 2013/14  
Oct. 28.  Dirk Kreimer HU Berlin 
Remarks on Cutkosky rules 
Nov. 04.  Lutz Klaczynski HU Berlin 
Avoidance of a Landau pole by flat contributions in QED 
Nov. 11.  Oliver Schnetz Erlangen / Berlin 
CANCELLED !!! 
Nov. 18.  Dhritiman Nandan HU Berlin 

Nov. 25.  Lionel Mason Oxford 
The holomorphic Wilsonloop: dlog forms of loop integrands and their evaluation 
Dec. 02.  Susama Agarwala Hamburg 
Dihedral symmetries of multiple polylogarithms: polygons and symbols 
Dec. 09.  Jean Alexandre Kings College 
Lorentzsymmetry violation and dynamical mass generation 
Jan. 13.  Christian Bogner HU Berlin 
Multiple polylogarithms and Feynman integrals 
Jan. 20.  Clemens Raab DESY Zeuthen 
Nested (inverse) binomial sums and new iterated integrals for massive Feynman diagrams 
Jan. 27.  Pierre Vanhove IHES 
the physics and arithmetics of the banana graphs in two dimensions 
Feb.03.  Kasper Larsen NIKHEF 
From Trees to Two Loops by Maximal Unitarity 
Feb. 13.  Pierre Clavier  tba 
Summer 2013  
April 22.  Dirk Kreimer HU 
On Parametric Representations 
April 29.  Clement Dupont IMJ (Jussieu) 
Galois theory of periods and combinatorial Hopf algebras 
May 13.  Claire Glanois IMJ (Jussieu) 
Motivic MZVs at Nth roots of unity 
May 27.  Fabian Wissbrock DESY (Zeuthen) 
Heavy flavor contributions to DIS at $O(\alpha_s^3)$: Diagrams with Two masses and nested topologies 
June 03  David Broadhurst Open University 
Polylogarithms from Schlaefli to Schwinger 
June 17  Marc Bellon LPTHE Jussieu 
Solving SchwingerDyson equations: a door to the high orders of perturbation theory 
June 24  Francis Brown IMJ (Jussieu) 
On associators 
June 26 2 pm 
John Gracey Liverpool 
Exploring the WessZumino model at high loops 
June 26 3 pm 
Ralph Kaufmann Purdue Univ. 
Feynman categories and new perspective on Hopf algebras 
July 01  Karen Yeats SFU Burnaby 
tba 
2021  

May 27 2021  10am: Paul Balduf  Linear DysonSchwingerEquations in minimal subtraction  
May 27 2021  11am: Jens Lücke  Motic graphs and the Hopf algebra of R*  
June 10 2021  10am: Mattia Bocchi  Exceptional Field Theory – an Overview of Theory and Applications  
June 10 2021  11am: Michele Galli  Exceptional Field Theory – an Overview of Theory and Applications  
June 17 2021  10am: André Kaderli  Elliptic multiple polylogarithms in open string theory  
June 17 2021  11am: Daniele Artico  NUMERICAL INTEGRATION AND PHENOMENOLOGY PERSPECTIVES  
July 01 2021  10am: Max Mühlbauer  On Cutkosky’s Theorem  
July 01 2021  5pm: Nick Olson Harris  Groups of formal power series and the renormalization group equation  
July 08 2021  postponed to fall  TBA  
July 08 2021  11am: tbd  TBA  
Feb 11 2021  10am: Jasper Roosmale Nepveu  Operator Bases and Renormalisation in Scalar Effective Field Theory  
Feb 11 2021  11am: Paul Balduf  tba  
2020  
Jan 09  Rene Klausen  GKZ hypergeometric systems and their relation to Feynman integrals  
May 14  Max Muehlbauer  tbd  
May 28  David Prinz  tbd  
June 11  Paul Balduf  tbd  
June 25  Rene Klausen  tbd  
2019  
February 14  Nick OlsonHarris (Waterloo)  Equality of skew Schur functions  
February 28  Lucas Nabergall (Waterloo)  Generalized chord diagram expansions  
March 14  Ali Mahmoud (Waterloo)  On diffeomorphisms and tree level amplitudes  
April 11  Paul Balduf (HU)  Perturbation theory of transformed quantum fields  
May 23  David Prinz (HU)  Gauge Symmetries and Ward Identities in Quantum General Relativity  
June 20  Matija Tapuskovic (Oxford U.)  Motivic Galois coaction on motivic Feynman integrals  
July 04  Lucia Rotheray (TU Dresden)  tba  
Oct 17  Lucas Harlan  The fVectors of the One Loop Moduli Spaces of Gluon Graphs  
Nov 28  Henry Kissler  more cancellations and enormous zeros  
2018  
November 08  Sam Yusim (Waterloo)  —  
November 22  William Dugan (Waterloo)  Sequences of Trees and HigherOrder Renormalization Group Equations  
December 06  Saoirse Amarteifio (Imperial College)  Applying the machinery of perturbative quantum field theory to spatial Markov processes 