| 23-28.09.2024 | Kraków, Poland | Conference "Syzygies and Hilbert Schemes" |
web page of the conference |
Also, on Monday 23rd, collaboration with Greg Smith |
| 1-04.09.2024 | Będlewo, Poland | "Baby Steps Beyond the Horizon", A workshop for students |
web page of the workshop |
Invited talk "Decompositions and secant varieties"
Video recording of the talk |
| 12.06.2024 | Uniwersytet Gdański | Geometry seminar talk |
web page of the seminar |
|
| 5.06.2024 | Uniwersytet Adama Mickiewicza in Poznań | SAGA seminar talk |
web page of the seminar |
|
| 11-19.05.2024 | Auburn University, AL, USA | JM Invariant at 60: A Conference on Tensor Invariants in Geometry and Complexity Theory |
web page of the conference |
Invited talk: "Algebraic torus actions on contact Fano manifolds" |
| 13-24.04.2024 | South Korea trip, details below | |
|
|
| 21-23.04.2024 | KIAS at Seoul | Scientific visit to Insong Choe, Junho Choe and Jeong-Seop Kim |
|
|
| 19-20.04.2024 | KAIST at Daejeon | Scientific visit to Kangjin Han and Insong Choe |
|
Seminar talk: "Cactus scheme, catalecticant minors and singularities of secant varieties to high degree Veronese reembeddings"
|
| 14-18.04.2024 | Center for Complex Geometry at Deajeon | Workshop on Geometry of Homogeneous Varieties |
web page of the workshop |
Two talks: "Contact Fano manifolds" and "Algebraic torus actions on smooth projective manifolds" |
| 1-4.03.2024 | Kraków, Poland | IMPANGA seminar and scientific visit to Grzegorz Kapustka and Michał Kapustka |
IMPANGA web page |
|
| 1.12.2023 | Kraków, Poland | IMPANGA seminar and scientific visit to Grzegorz Kapustka |
IMPANGA web page
|
|
| 17-22.06.2023 | Florence and Bologna, Italy | Scientific visits to Giorgio Ottaviani, Alessandro Gimigliano, and Cosimo Flavi |
|
Seminar talks: "Algebraic torus actions on contact Fano manifolds" in Florence, and "Singular Curves of Low Degree and Multifiltrations from Osculating Spaces". |
| 12-17.06.2023 | Madrid, Spain | 25th Conference of the International Linear Algebra Society |
conference web page |
Minisimposium talk "Apolarity for border rank" |
| 30-31.05.2023 |
Gdańsk and Sopot, Poland |
Scientific visit to Tomasz Szarek and Andrzej Szczepański |
|
Seminar talk at UG "Białynicki-Birula decomposition in examples and applications"
|
| 8-22.05.2023 |
Toulouse, France | Workshop "Cactus Vs Secants" and scientific collaboration with Joseph Landsberg |
workshop web page |
Invited talks "Cactus varieties and cactus rank (introductory talk)" and "Minors, cactus scheme, and scheme theoretic equations". |
| 16-20.04.2023 |
Będlewo, Poland | Conference "Explicit Algebraic Geometry" |
conference web page |
|
| 12.09-16.12.2022 |
IMPAN, Warsaw, Poland | AGATES: Algebraic Geometry with Applications to TEnsors and Secants,
a semester in Algebraic Geometry. Included seven weekly conferences, and many other activities. |
Web page of AGATES |
Organised by Weronika Buczyńska, Francesco Galuppi, Joachim Jelisiejew, and myself |
| 5-9.09.2022 |
Lausanne, Switzerland | Workshop on the interaction between foliations and algebraic geometry |
Workshop's webpage |
Invited talk: "Characteristic foliations on contact manifolds" |
| 10-16.07.2022 |
Cetraro, Italy | Group Actions in Algebraic Geometry, Klaus Altmann 65th birthday conference |
conference web page |
Invited talk: "Secant varietes of toric varieties and multigraded Hilbert scheme" |
| 19.04-22.05.2022 |
Toulouse, France | Collaboration with Joseph Landsberg and Laurent Manivel |
web page of Joseph and of Laurent |
|
| 25-29.04.2022 |
Toulouse, France | Workshop on geometry and complexity theory |
workshop web page |
Invited talk and research group leader: "Border apolarity" |
| 27.03-2.04.2022 |
Oberwolfach, Germany | Toric Geometry |
|
|
| 11-15.10.2021 |
IMPAN in Warsaw, Poland | Miniworkshop Tensor Days |
|
|
| 16-20.08.2021 |
On-line (formally in College Station, Texas, USA) | SIAM Conference on Applied Algebraic Geometry (AG21) |
conference web page |
Session speaker, talk "Fujita Vanishing, Sufficiently Ample Line Bundles, and Cactus Varieties" |
| 21-25.06.2021 |
On-line (formally in Levico Terme, Italy) | GO60 conference: Pure & Applied Algebraic Geometry celebrating Giorgio Ottaviani's 60th birthday |
conference web page |
|
12.03-07.04.2020 | USA trip: Charlottesville VA, St. Louis MO, Boise ID, College Station TX | an AMS meeting and scientific visits, details below. |
| Trip cancelled due the pandemic and worldwide travel bans |
22.03-07.04.2020 |
Texas A&M, College Station, TX, USA | Scientic visit to Joseph Landsberg |
Joseph's webpage |
Seminar talk |
18.03-21.03.2020 |
Boise, ID, USA |
Scientific visit to Zach Teitler |
Web page of Zach |
Seminar talk |
16.03-17.03.2020 |
St. Louis, MO, USA |
Scientific visit to Ravindra Girivaru |
Web page of Ravindra |
Seminar talk |
12.03-15.03.2020 |
Charlottesville, VA, USA |
AMS sectional meeting |
Web page of the meeting |
20min talk at the session on Tensors and Complexity |
| 16-20.12.2019 |
Warsaw, Poland | Conference "Selected Topics of Simons Semesters in Banach Center" |
Conference webpage |
Organised by Piotr Gwiazda, Filip Rupniewski, Łukasz Stettner, and myself |
| 12-13.12.2019 |
Warsaw, Poland | "Algebraic groups days", a satelite workshop of the above conference |
Workshop's webpage |
|
| 01-04.12.2019 | Kraków, Poland | Scientific visit to Michał Kapustka, Grzegorz Kapustka |
| Seminar talk |
| 09.07-13.07.2019 |
Bern | SIAM AG |
Conference webpage |
Session speaker, talk "Apolarity for border rank" |
| 17.06-05.07.2019 |
Grenoble | School on Foliations |
School webpage |
|
| 21.03.2019 |
Barcelona | Seminar talk at Barcelona Algebraic Geometry Seminar |
Seminar webpage |
Talk: "Strassen's additivity of tensor rank for small three-way tensors" |
| 2-7.01.2019 |
Copenhagen, Denmark | Research visit to Lars Halle and Elisa Postinghel |
|
|
| 1.09-1.12.2018 |
IMPAN, Warsaw, Poland | VAT, Varieties: Arithmetic and Transformations,
semester in Algebraic Geometry. Details below. |
Web page of VAT |
Organised by Piotr Achinger, Nathan Ilten, Masha Vlasenko, and myself |
| 22-23.11.2018 | Warsaw, Poland | VAT mini-workshop "T-Varieties" |
Web page of mini-workshop | I am one of the organisers, and I gave a talk "T-varieties via fixed points and moment polytopes" |
| 5-9.10.2018 |
Stockholm, Sweden | Research visit to Mats Boij, Boris Shapiro and Greg Smith at KTH and Stockholm University |
|
Seminar talk at Stockholm University: Immaculate line bundles |
| 23-29.09.2018 | Warsaw, Poland | VAT School and workshop "Varieties and Group Actions" |
Web page of the workshop | I am one of the organisers |
| 17-20.09.2018 | Wrocław, Poland | Joint meeting of Polish and Italian Math Societies |
webpage of the meeting | |
| 2-8.09.2018 | Łukęcin, Poland | VAT School "Arithmetic of Differential Equations" |
Web page of the school | |
| 5-10.07.2018 | Cologne and Essen, Germany | Joint Seminar on Complex Algebraic Geometry and Complex Analysis (Bochum - Essen - Köln - Wuppertal)
and scientific visit to Daniel Greb in Essen |
web page of the Joint Seminar | Talk: "Algebraic torus actions on contact Fano manifolds" |
| 22-29.04.2018 | Kraków, Poland | School and conference "Modern and Classical Aspects on Algebraic Surfaces" |
web page of the event | |
| 8-22.02.2018 | Freiburg, Germany | Activities of the yearly program "research focus on Cohomological Methods in Algebraic Geometry and Representation Theory" |
web page of the activity | |
| 22-23.01.2018 | Kraków, Poland | Scientific visit to Michał Kapustka, Ola Borówka |
| Seminar talks: at UJ "Rozmaitości kontaktowe Fano z działaniem torusa" and at UP "Niepokalane wiązki liniowe na rzutowych rozmaitościach torycznych" |
| 16.11.2017 | Berlin, Germany | Scientific visit to Klaus Altmann, Anna-Lena Wintz, Lars Kastner |
| |
| 12-15.11.2017 | Max Planc in Leipzig, Germany | Scientific visit to Andre Uschmajew, Wolfgang Hackbusch, Mateusz Michałek |
| |
| 24-30.09.2017 | Berlin, Germany | Scientific visit to Klaus Altmann, Anna-Lena Wintz, Lars Kastner |
web page of Klaus | |
| 3-9.09.2017 | Łukęcin, Poland | 40th Autumn School in Algebraic Geometry "Binomial Ideals" |
web page of the school | |
| 15-19.08.2017 | Tübingen, Germany | Workshop "Experimental Classification of Fano varieties" |
web page of the workshop | |
| 23.07-05.08.2017 | USA trip: Auburn, AL and Atlanta, GA | Two conferences, details below. |
| |
| 31.07-04.08.2017 | Atlanta, GA, USA | SIAM Conference on Applied Algebraic Geometry |
Web page of the conference | Session speaker "Points of high rank" |
| 24-28.07.2017 | Auburn, AL, USA | Conference:
Tensors and their uses in approximation theory, quantum information theory and geometry |
Web page of the conference | Discussion leader, talk "Points of high rank" |
| 25.06-01.07.2017 | Będlewo, Poland | Conference Applied Topology 2017 |
Web page of the conference | Plenary speaker "Constructions of k-regular maps using finite local scheme" |
| 12-16.06.2017 | Nice, France | Conference MEGA 2017 | Web page of the conference | Invited plenary speaker "Constructions of k-regular maps using finite local scheme" |
| 1-4.06.2017 | Kraków, Poland, at Pedagogical University | Polish Conference "Oblicza Algebry II" |
Web page of the conference | Invited speaker,
talk "Konstrukcje ciągłych odwzorowań k-regularnych przy użyciu skończonych schematów" |
| 16-24.05.2017 | Midlands (UK) trip: Sheffield, Loughborough, Nottingham and Coventry | Scientific visit to Tom Bridgeland, Elisa Postinghel, Al Kasprzyk, and Gavin Brown |
Web pages of Tom, Elisa, Al and Gavin | Colloquium talk at Sheffield "Constructions of k-regular maps using finite local scheme", Seminar talk at Loughborough "Contact Fano 7-folds" |
| 24-28.04.2017 | Edinburgh, UK | Workshop "Positivity in algebraic and complex geometry" |
Web page of the workshop | |
| 19-25.01.2017 | Berlin, Germany at Freie U. | Scientific visit to Klaus Altmann, Lars Kastner and Anna-Lena Wintz |
Web page Klaus | Seminar talk "Maps of Mori Dream Spaces" |
| 12-14.12.2016 | Max Planck Institute in Leipzig, Germany | Tensors: Algebra meets Numerics |
web page of the workshop | Invited speaker; talk "The Hackbusch conjecture on tensor formats" |
| 30.11-02.12.2016 | Barcelona, Spain | Algebra and Geometry Meeting |
web page of the meeting | Invited speaker; talk "Maps of Mori dream spaces" |
| 15.09-19.10.2016 (dates approximate) | Canada trip: Toronto and Montreal |
Mainly "Combinatorial Algebraic Geometry", a semester at Fields Institute, Toronto; Details below. |
Web pages of the semester: maintained by the organisers
and maintained by Fields Institute |
|
| 03-07.10.2016 | Toronto, Canada at Fields Institute |
Convexity Workshop |
Web page of the workshop |
|
| 21-25.09.2016 | Montreal, Canada |
Scientific visit to Piotr Przytycki and Marcin Sabok |
|
Seminar talk: "Constructions of k-regular maps using algebraic geometry" |
| 05-09.09.2016 | Warsaw, Poland | Workshop on Geometry of Hypersurfaces in Lagrangian Grassmannians and
Integrable Systems |
Web page of the workshop. | Invited speaker |
| 22.07-06.08.2016 | Kyoto, Japan | workshops "Algebraic Statistics and Symbolic Computation" and "Convex polytopes" |
| Invited speaker at the first workshop |
| 11-15.07.2016 | Brno, Czech Republic | conference Differential Geometry and its Applications |
Web page of the conference | Invited speaker at a session on Matrix multiplication |
| 17.04-18.06.2016 | IMPAN, Warsaw, Poland | miniPAGES, mini-semester in Algebraic Geometry. Details below. |
Web page of miniPAGES | Organised by Sławomir Cynk, Tomasz Szemberg, and myself |
| 12-18.06.2016 | Będlewo, Poland | miniPAGES conference: Varieties with trivial canonical bundles |
Web page of the conference | |
| 31.05-04.06.2016 | Stockholm University | Thesis defence of Alessandro Oneto |
| Seminar talk |
| 15-21.05.2016 | Pedagogical University in Cracow, Poland | miniPAGES workshop: Asymptotic invariants attached to linear series |
Web page of the workshop | a coorganiser |
| 06-08.05.2016 | University of Gdańsk, Poland | Jankowski lecture and accompanying miniconference |
Web page of Jankowski lecture
and the miniconference |
Invited speaker at the miniconference |
| 17-23.04.2016 | IMPAN, Warsaw, Poland | miniPAGES school: Varieties of Calabi-Yau type |
Web page of the school | |
| 08-11.03.2016 | Linz, Austria and Znojmo, Czech Republic | Scientific visit to Josef Schicho at RISC and a workshop in Znojmo |
Web page of Josef | |
| 2-6.11.2015 | Levico Terme, Italy | Workshop "Hyper-Kähler Manifolds and Related Structures in Algebraic and Differential Geometry" |
Web page of the workshop | Organised by Uwe Semmelmann, Jarosław Wiśniewski, Frederik Witt and myself |
| 21-23.10.2015 | Essen, Germany | Seminar talk at Essen Oberseminar of Algebraic Geometers |
| Talk "Defining equations of secant varieties to high degree Veronese reembeddings" |
| 20-30.09.2015 | Torino, Milano, and Trento (Italy) | Scientific visit to Enrico Carlini, Gianfranco Casnati, Roberto Notari, Luis Sola Conde, also GTM seminar in Milano 24-25.09.2015 |
Web page of GTM | Talk at GTM "Constructions of k-regular maps using finite local schemes" |
| 1-12.08.2015 | Daejon, South Korea | "SIAM Conference on Applied Algebraic Geometry" and scientific visit to Sijong Kwak and Kangjin Han |
Web pages of the conference
and the session on "Tensor decomposition: syzygies meet applications" | Invited short talk at the session: "The Hackbusch Conjecture on tensor formats" and a research talk at KAIST: "Constructions of k-regular maps using finite local schemes" |
| 12-18.04.2015 | Będlewo, Poland | "IMPANGA 15" conference |
Web page of the conference | I am an organiser of the conference |
| 19-20.03.2015 | Warsaw, Poland | Meeting Algebraic Geometry, Warsaw 1960 - 2015 |
Web page of the meeting | |
| 18.03.2015 | Poznań, Poland | SAGA seminar |
SAGA web page |
Seminar talk: "Równania rozmaitości siecznych do zanurzeń Veronese." |
| 2-3.03.2015 | Kraków, Poland | Scientific visit to Tomasz Szemberg and Piotr Pokora |
| Seminar talk: "Apolarność i rangi" |
| 3-4.02.2015 | Kraków, Poland | Piotr Pokora's PhD defense |
| |
| 7.10-22.11.2014 | USA trip: Chicago, Berkeley, Boise, Boston |
Mainly "Algorithms and Complexity in Algebraic Geometry", a semester at Simons Institute, Berkeley; Details below. |
Web page of the semester |
|
| 16-22.11.2014 | Boston, MA, USA, at Northeastern University |
Scientific visit to Tony Iarrobino. |
Web page of Tony |
Talk "Apolarity and direct sum decompositions of polynomials" |
| 9-16.11.2014 | Berkeley, CA, USA, at Simons Institute |
Workshop "Tensors in Computer Science and Geometry" |
Web page of the workshop |
Invited talk: "Rank, Border Rank, Smoothable Rank and Cactus Rank " |
| 5-9.11.2014 | Boise, ID, USA |
Scientific visit to Zach Teitler |
Web page of Zach |
Colloquium talk "Constructions of k-regular maps using finite local schemes",
and seminar talk "Subvarieties and maps of affine spaces, projective spaces and toric varieties" |
| 11.10-5.11.2014 | Berkeley, CA, USA, at Simons Institute |
Workshop "Solving Polynomial Equations" and other activities of the semester "Algorithms and Complexity in Algebraic Geometry" |
Web page of the workshop and the semester |
|
| 7.10-11.10.2014 | Chicago, IL, USA, at University of Illinois, Chicago |
Scientific visit to Izzet Coskun and Adam Ginensky |
Web page of Izzet |
Talk: "Defining equations of secant varieties to Veronese reembeddings" |
| 17-20.09.2014 | Poznań, Poland | DMV-PTM Mathematical Meeting |
Web page of the session
and of the meeting | I am co-organising a session
"Quaternion-Kähler manifolds and related structures in Riemannian and algebraic geometry". |
| 3-23.08.2014 | South Korea trip | ICM, Satellite, and research visits; details below |
| |
| 12-23.08.2014 | Seoul, South Korea, at COEX | International Congress of Mathematicians |
Web page of the ICM |
Short communication "Defining equations of secant varieties to Veronese reembeddings" and
chairing a short communication session.
|
| 12.08.2014 | Seoul, South Korea, at KIAS | Research visit to Luis E. Solá Conde |
Web page of Luis |
Lecture "Contact Fano Manifolds" |
| 11.08.2014 | Seoul, South Korea, at Konkuk University | Research visit to Insong Choe |
|
Lectures "Waring decompositions of monomials", "Apolarity and direct sum decomposability of polynomials". |
| 3-10.08.2014 | Daejeon, South Korea | ICM Satellite conference on Complex and Algebraic Geometry |
Conference web page |
|
| 14-18.07.2014 | Trento, Italy | Summer school: An interdisciplinary approach to tensor decomposition |
Web page of the school | |
| 19-24.04.2014 | SISSA, Trieste, Italy | Scientific visit to Ada Boralevi |
Web page of Ada Boralevi | Talk: Apolarity and direct sum decompositions |
| 9-15.03.2014 | Mainz, Germany | Spring School: Rational Curves and Contact Geometry |
School web page | Contributed talk: Legendrian varieties |
| 28-31.01.2014 | Trieste, Italy | Vector Bundle Days |
Conference web page | Invited talk: Special lines on contact Fano manifolds |
| 21-27.11.2013 | Zürich, Switzerland, at Universität Zürich |
Scientific visit to Michał Kapustka |
| |
| 03.11-09.11.2013 | Oberwolfach, Germany | Miniworkshop Quaternion Kähler Structures in Riemannian and Algebraic Geometry |
Web page of MFO | Given a talk: "Special lines on contact Fano Manifolds" |
| 13.10-15.10.2013 | Kraków, Poland | Collaboration with Grzegorz Kapustka |
| Seminar talk at UJ: "Rozmaitości kontaktowe Fano: linie i dywizory" |
| 16.09-18.09.2013 | Kraków, Poland | Collaboration with Grzegorz Kapustka |
| |
| 01.09-07.09.2013 | Łukęcin, Poland | 36th Autumn School in Algebraic Geometry,
Power sum decompositions and apolarity, a geometric approach |
Web page of the school | I was the main organiser of the school. |
| 06.06-15.06.2013 | Oslo, Norway | Scientific visit to Kristian Ranestad |
Web page of Kristian Ranestad |
Talk: Special lines on contact Fano manifolds |
| 26.05-30.05.2013 | Berlin, Germany |
Syzygies in Berlin |
Web page of the workshop | |
| 24.05-26.05.2013 | Będlewo, Poland |
IV Interdisciplinary Mathematical Workshop |
Web page of the workshop (in Polish) |
I gave a talk "Decomposing polynomials into simple polynomials".
|
| 03.04-09.04.2013 | Loughborough, United Kingdom, at University of Loughborough |
Scientific visit to Gavin Brown |
Web page of Gavin | I gave a talk on secant varieties to Veronese varieties |
| 12.03-20.03.2013 | Zürich, Switzerland, at Universität Zürich |
Scientific visit to Michał Kapustka |
| |
| 27.01-02.02.2013 | Luminy near Marseille, France, at CIRM | Rencontre du Groupement de Recherche Géométrie Algébrique et Géométrie Complexe |
Web page of the meeting | I gave a talk "Contact Fano manifolds: pieces of the homogeneous structure". |
| 23.09-29.09.2012 | Łukęcin, Poland | 35th Autumn School in Algebraic Geometry, Subgroups of Cremona groups |
Web page of the school | I was an organiser of the school. |
| 13.09-23.09.2012 | Trento, Italy, at CIRM-Fondazione Bruno Kessler | School and workshop on invariant theory and projective geometry |
Announcement of the school | |
| 19.07-28.07.2012 | Seoul, South Korea, at Ewha Womans University | Summer School on Differential Geometry |
Web page of the school | I gave a series of two talks on "Secant varieties". I also collaborated with Insong Choe and Jun-Muk Hwang. |
| 27.06-30.06.2012 | Kraków, Poland, at Pedagogical University | Conference "Algebraic and Arithmetic Geometry", a satelite meeting of the 6th European Congress of Mathematics |
Web page of the conference | |
| 11.04-14.04.2012 | Warsaw, Poland, at IMPAN |
Research Group "Hyperkähler manifolds", a part of IMPANGA |
Web page of the research group | I was an organiser of the research group. |
| 05.02-08.02.2012 | Berlin, Germany, at Freie Universität |
Scientific visit to Klaus Altmann and Lars Petersen |
Web page of Klaus | I gave a talk
"Defining equations of secant varieties to Veronese reembeddings". |
| 01.02-05.02.2012 | Zürich, Switzerland, at Universität Zürich |
Scientific visit to Michał Kapustka and Grzegorz Kapustka |
| |
| 17.01-20.01.2012 | Nice, France, at INRIA |
Scientific visit to Bernard Mourrain and Alessandra Bernardi |
Web page of Bernard | I gave a talk
"On the third secant variety". |
| 16.11-18.11.2011 | Milano, Italy, at Politechnico di Milano |
Genova-Torino-Milano Seminar: some topics in Commutative Algebra and Algebraic Geometry |
Web page of the meeting | |
| 09.10-14.10.2011 | Luminy, France, at CIRM |
School on Moduli spaces and automorphic forms |
| |
| 18.09-24.09.2011 | Łukęcin, Poland |
34th Autumn School in Algebraic Geometry: "Geometric Invariant Theory, old and new" |
| |
| 25.07-29.07.2011 | Freiburg, Germany, at Albert-Ludwigs-Universität |
Birational Automorphisms of Varieties of General Type, A Summer School in Birational Algebraic Geometry |
Web page of the meeting | |
| 26.06-30.06.2011 | Bayreuth, Germany |
Scientific visit to Thomas Peternell |
| I gave a talk "Defining equations of secant varieties to Veronese reembeddings " |
| 04.06-11.06.2011 | Leuven, Belgium |
Toric geometry and applications |
| I presented a poster "Maps of toric varieties in Cox coordinates" |
| 20.12.2010-16.01.2011 | Warsaw, Poland |
Scientific visit to Jarosław Wiśniewski |
| I gave a talk "Rozmaitości kontaktowe i kaktusy" |