Selection of talks:


"Exceptional simple Lie algebras f4 and e6, accidental CR structures and the triality " [.pdf] . This is a pdf presentation of a talk at SISSA, at the `Geometric structures seminar'; this happened on 4.09.2023 in Trieste.
"Decaphonic piano: its mathematics, physics and sound" [.pdf] . This is a pdf presentation of a public talk, that I gave at the Warsaw University Physics Department's Ask a Physicist Series. The talk was a part of the conference GRIEG meets Chopin, which had place in Warsaw between 10-14.07.2023, and was a preparation for the Concert of Leszek Mozdzer introducing the acoustic decaphonic piano which I helped to design.
"Exceptional real Lie algebras f4 and e6 via contactifications" [.pdf] . These are pdf notes of a talk at the Sophus Lie seminar of Arctic University of Norway, which I gave celebrating my 3x4x5 birthday, on 14.02.2023 in Tromso.
"Poincare-Einstein approach to Penrose's Conformal Cyclic Cosmology" [.pdf] . This is a pdf presentation from the Robin Graham's birthday conference Conformal geometry, Analysis, and Physics heald in Seattle, 14.06.2022.
"Simple models in Penrose's Conformal Cyclic Cosmology" [.pdf] . This is a pdf presentation from a talk on several simple models of Penrose's CCC; the talk was at the Wrasaw University's Relativity Seminar on 29.01.2021. There is also other version of the same talk: given at the International Meeting on Lorentzian Geometry in Cordoba, February 2021.
"Before the Big Bang? Penrose's Conformal Cyclic Cosmology" Guangdong Technion version , or Nara Women's University version . These are two versions of the same public talk presentations about Penrose's CCC. One of the talk was in Shantou, China in 2020, and the other in Nara, Japan, in 2022.
"Minicourse on Conformal Cyclic Cosmology" Part I , Part II , Part III . These are pdf presentations from my minicourse on Penrose's CCC, which I gave at the GRIEG seminar at the turn of 2020/2021.
"How the green light was given for gravitational wave search" [.pdf] , This is a pdf presentation of a talk that I gave in many institutions over the World; this one is from the Simons Center in Stony Brook, on 14th December 2016.
"Towards the theory of gravitational radiation" [.pdf] , This is a pdf from my talk at King's College London, which initiated many talks I have given to emphasize the fundamental role of Andrzej Trautman in establishing the theory of gravitational radiation; my first talk on this subject was deliberately at King's College London; it happened on 28 April 2016.
"Old and new on `Rolling without slipping or twisting'" [.pdf] , A pdf presentation on rolling without slipping or twisting; this is CINVESTAV version, CINVESTAV, Mexico City, 3.12.2015
"Twistor space for rolling bodies" [.pdf] , A pdf presentation on rolling without slipping or twisting; this is Vienna version, Relativity Seminar, University of Vienna, 8.05.2014
"Examples of explicit Fefferman-Graham metrics" [.pdf] , A pdf presentation from a talk at Banff Research Station, July 2012
"Conformal geometry of differential equations" [.pdf] , A pdf presentation summarizing my knowledge on relations between geometry of PDEs and conformal geometry; the talk was at the University of Adelaide, on 12.02.2010,
"GL(2,R) geometry of 5th order ODEs" [.pdf] , A pdf presentation from a conference Recent advances in Differential Geometry , Universita' del Salento, Lecce, June 2007
"Differential equations and conformal structures", Trieste version [.pdf] , A pdf presentation from International Workshop on Geometry of vector distributions, differential equations, and variational problems , SISSA, Trieste, December 2006
"Differential equations and conformal structures" [.pdf] , A pdf presentation from Workshop at 2006 IMA Summer Program "Symmetries and Overdetermined Systems of Partial Differential Equations" , Minneapolis, July 2006
"Distinguished dimensions for special Riemannian geometries" [.pdf] , A pdf presentation from Workshop on "Special Geometries in Mathematical Physics" , Kuehlungsborn, March 2006; It was then repeated in many places; the pdf is from my Auckland (New Zealand) talk on 30.01.2007
"Special Riemannian geometries in dimensions 5, 8, 14 and 26", transparencies of a talk at IFT Symposium, Warszawa, December 2005 [ .pdf ]
"Differential equations and conformal structures", transparencies of a talk at IXth International Conference on Differential Geometry and its Applications, Prague, September 2004 [ .pdf ]
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