Contact info ]     [ Research interests ]     [ Teaching ]     [ Publications and preprints ]     [ Presentations at conferences ]     [ Links ]

 

Johan Öinert


PhD and Reader in Mathematics
(På svenska: Teknologie doktor och docent i matematik)
 
Professor of Mathematics


Contact info

Postal address:   Visitors' address:
         Johan Öinert   Room J3641, Campus Gräsvik, Valhallavägen 1
         Department of Mathematics and Natural Sciences           
         Blekinge Institute of Technology                  Direct Phone: +46 (0)455 38 5684
         SE-37179 Karlskrona          Fax: +46 (0)455 38 5057
         SWEDEN          johan.oinert (ª) bth.se

Research interests

UK flag Click here to see the Wordle image generated from my thesis abstract.

Swedish flag

En populärvetenskaplig beskrivning på svenska kommer postas här, i sinom tid...

I am a member of the research group in Algebra and Geometry at Blekinge Institute of Technology . In the past, I have been a member of the research groups in Non-commutative Geometry and Applications respectively Algebra, at Lund University (2012-2014), the research group in Non-commutative Geometry within the Centre for Symmetry and Deformation at the University of Copenhagen (2010-2012), the research group in Non-commutative Geometry and Applications at Lund University (2008-2010) and the research group in Algebra and Geometry at the University of Antwerp (2006-2008).

My favourite open problems

A common belief (amongst non-mathematicians) is that mathematics is a finished subject, that there is nothing more to explore. However, the real situation is quite the opposite. There are plenty of important problems that are open in the sense that noone has been able to solve them. Here is a list of my favourite open problems/conjectures:
  1. The idempotent/zero-divisor/unit conjecture for group rings
    (Counterexamples to the unit conjecture were provided by Gardam in 2021 resp. 2023. See here and here. See also Murray's paper.)
  2. The Kadison-Kaplansky conjecture
  3. The Baum-Connes conjecture
  4. The Goldbach conjecture
  5. The Kadison-Singer problem, Solved in 2013 by Marcus, Spielman and Srivastava!!!, arXiv:1306.3969 [math.CO]
  6. Köthe's conjecture
  7. The Riemann hypothesis
(Shortly, I will try to write out some more details about these problems.)

Students, collaborators, genealogy etc.

My co-authors include My Erdös number is 4 and my Einstein number is 5 (take a look here!).

In the autumn of 2012, I participated in the Leavitt Path Algebra Seminar at the Centre for Symmetry and Deformation, University of Copenhagen.

People that I like to keep track of:
Gergely Berczi, Viola Bruni, Vladimir Dotsenko, Alex Engström , Ghislain Fourier, Magnus Goffeng, Isar Goyvaerts, Jonas Hartwig, Daniel Larsson, Javier Lopez Pena, Douglas Lundholm, Samuel Lundqvist, Ehud Meir, Tomas Persson, Anne Pichereau, Artur Ruuge, Karl Rökaeus, Isar Stubbe, Christian Svensson, Jacob Sznajdman, Bogdan Toader, Fred Van Oystaeyen, Qimh Xantcha.

Genealogy of my mathematical ancestors (i.e. supervisor, supervisor's supervisor etc.) from The Mathematics Genealogy Project
Carl Fabian Björling  
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Anders Wiman Erik Holmgren
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Arne Beurling Torsten Carleman
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Lennart Carleson Åke Pleijel
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Hans Wallin Jaak Peetre
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Sergei D. Silvestrov Gunnar Sparr
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Me


Teaching

Autumn 2012: Endimensionell analys för V och W, delkurs B1
Endimensionell analys för V och W, delkurs B2
Spring 2013: Matematisk kommunikation för Pi (handledning av två olika projekt)
Autumn 2013: Endimensionell analys för BI, L och V, delkurs B1
Endimensionell analys för BI, L och V, delkurs B2
Spring 2014: Matematisk kommunikation för Pi (handledning av två olika projekt)
Spring 2015: Analys 1 för IE och MT
Autumn 2015: Flervariabelanalys för IE och MT
Spring 2016: Diskret matematik för DS och SP
Autumn 2016: Flervariabelanalys för IE och MT
Autumn 2017: Diskret matematik för DS och SP
Flervariabelanalys för IE och MT
Spring 2018: Diskret matematik för IE
Autumn 2021: Diskret matematik för AI, DS, IE, ITS, MJ och SP (Online)
Spring 2022: Analys 1 för AI, DS, IE, ITS, MJ, MrT, MT och MTH (Online)

(AI=AI och maskininlärning, DS=Datorsäkerhet, IE=Industriell ekonomi, ITS=IT-säkerhet (HI), MrT=Marin teknik, MT=Maskinteknik, MTH=Maskinteknik (HI), MJ=Mjukvaruutveckling, SP=Spel- och programvaruteknik)


Publications and preprints

Theses If you have trouble accessing any of the papers below, please send me an e-mail and I will do my best to try to help you!

Accepted papers

  1. J. Öinert and S. Silvestrov,
    ''Commutativity and Ideals in Algebraic Crossed Products'',
    Journal of Generalized Lie Theory and Applications, Vol. 2, No. 4, pp. 287-302 (2008)

  2. J. Öinert and S. Silvestrov,
    ''On a Correspondence Between Ideals and Commutativity in Algebraic Crossed Products'',
    Journal of Generalized Lie Theory and Applications, Vol. 2, No. 3, pp. 216-220 (2008)

  3. J. Öinert and S. Silvestrov,
    ''Crossed Product-Like and Pre-Crystalline Graded Rings'',
    Chapter 24 in "Generalized Lie Theory in Mathematics, Physics and Beyond", Silvestrov, S.; Paal, E.; Abramov, V.; Stolin, A. (Eds.), 16pp., Springer (2009) [ publisher's web site ]

  4. J. Öinert and S. Silvestrov,
    "Commutativity and Ideals in Pre-Crystalline Graded Rings",
    Acta Applicandae Mathematicae, Vol. 108, No. 3, pp. 603-615 (2009) [ publisher's website ]

  5. J. Öinert, S. Silvestrov, T. Theohari-Apostolidi and H. Vavatsoulas,
    "Commutativity and Ideals in Strongly Graded Rings",
    Acta Applicandae Mathematicae, Vol. 108, No. 3, pp. 585-602 (2009) [ publisher's website ]

  6. J. Öinert,
    "Simple Group Graded Rings and Maximal Commutativity",
    Contemporary Mathematics (American Mathematical Society), Vol. 503, pp. 159-175 (2009)

  7. J. Öinert and P. Lundström,
    "Commutativity and Ideals in Category Crossed Products",
    Proceedings of the Estonian Academy of Sciences, Vol. 59, No. 4, pp. 338-346 (2010)

  8. J. Öinert and P. Lundström,
    "The Ideal Intersection Property for Groupoid Graded Rings",
    Communications in Algebra, Vol. 40, No. 5, pp. 1860-1871 (2012) [ publisher's website ]

  9. J. Öinert and P. Lundström,
    "Miyashita Action in Strongly Groupoid Graded Rings",
    International Electronic Journal of Algebra, Vol. 11, pp. 46-63 (2012)

  10. P. Lundström and J. Öinert,
    "Skew category algebras associated with partially defined dynamical systems",
    International Journal of Mathematics, Vol. 23, No. 4, pp. 16 (2012) [ publisher's website ]

  11. J. T. Hartwig and J. Öinert,
    "Simplicity and maximal commutative subalgebras of twisted generalized Weyl algebras",
    Journal of Algebra, Vol. 373, 312-339 (2013) [ publisher's website ]

  12. J. Öinert, J. Richter and S. Silvestrov,
    "Maximal commutative subrings and simplicity of Ore extensions",
    Journal of Algebra and Its Applications, Vol. 12, No. 4, 1250192, 16 pp. (2013) [ publisher's website ]

  13. J. Öinert,
    "Simplicity of skew group rings of abelian groups",
    Communications in Algebra, Vol. 42, No. 2, 831-841 (2014). [ publisher's website ]

  14. P. Nystedt and J. Öinert,
    "Simple skew category algebras associated with minimal partially defined dynamical systems",
    Discrete and Continuous Dynamical Systems - Series A (DCDS-A), Vol. 33, No. 9, 4157-4171 (2013) [ publisher's website ]

  15. P. Nystedt and J. Öinert,
    "Simple rings and degree maps",
    Journal of Algebra, Vol. 401, 201-219 (2014) [ publisher's website ]

  16. D. Gonçalves, J. Öinert and D. Royer,
    "Simplicity of partial skew group rings with applications to Leavitt path algebras and topological dynamics",
    Journal of Algebra, Vol. 420, 201-216 (2014) [ publisher's website ]

  17. P. Nystedt and J. Öinert,
    "Simple semigroup graded rings",
    Journal of Algebra and Its Applications, Vol. 14, No. 7, 1550102, 10 pp. (2015) [ publisher's website ]

  18. P. Nystedt and J. Öinert,
    "Outer partial actions and partial skew group rings",
    Canadian Journal of Mathematics, Vol. 67, No. 5, 1144-1160 (2015) [ publisher's website ]
    [ Preprint available @ arXiv ]

  19. P. Nystedt, J. Öinert and J. Richter,
    "Non-associative Ore Extensions",
    Israel Journal of Mathematics, Vol. 224, No. 1, 263-292 (2018) [ publisher's website ]
    [ Preprint available @ arXiv ]

  20. Mai Hoang B. and J. Öinert,
    "Quasi-duo differential polynomial rings",
    Journal of Algebra and Its Applications, Vol. 17, No. 4, 11 pp. (2018) [ publisher's website ]
    [ Preprint available @ arXiv ]

  21. J. Öinert,
    "Bimodules in group graded rings",
    Algebras and Representation Theory, Vol. 20, No. 6, 1483-1494 (2017) [ publisher's website ]
    [ Preprint available @ arXiv ]

  22. P. Nystedt, J. Öinert and H. Pinedo,
    "Artinian and noetherian partial skew groupoid rings",
    Journal of Algebra, Vol. 503, 433-452 (2018) [ publisher's website ]
    [ Preprint available @ arXiv ]

  23. P. Nystedt, J. Öinert and H. Pinedo,
    "Epsilon-strongly graded rings, separability and semisimplicity",
    Journal of Algebra, Vol. 514, 1-24 (2018) [ publisher's website ]
    [ Preprint available @ arXiv ]

  24. V. Beuter, D. Gonçalves, J. Öinert and D. Royer,
    "Simplicity of skew inverse semigroup rings with applications to Steinberg algebras and topological dynamics",
    Forum Mathematicum, Vol. 31, No. 3, 543-562 (2019) [ publisher's website ]
    [ Preprint available @ arXiv ]

  25. P. Nystedt, J. Öinert and H. Pinedo,
    "Epsilon-strongly groupoid-graded rings, the Picard inverse category and cohomology",
    Glasgow Mathematical Journal, Vol. 62, 233-259 (2020)
    [ Preprint available @ arXiv ]

  26. P. Nystedt, J. Öinert and J. Richter,
    "Simplicity of Ore monoid rings",
    Journal of Algebra, Vol. 530, 69-85 (2019)
    [ Preprint available @ arXiv ]

  27. P. Nystedt and J. Öinert,
    "Group gradations on Leavitt path algebras",
    Journal of Algebra and Its Applications, Vol. 19, No. 9, 16 pp. (2020)
    [ Preprint available @ arXiv ]

  28. P. Nystedt and J. Öinert,
    "Simple graded rings, non-associative crossed products and Cayley-Dickson doublings",
    Journal of Algebra and Its Applications, Vol. 19, No. 12, 22 pp. (2020)
    [ Preprint available @ arXiv ]

  29. P. Nystedt and J. Öinert,
    "Strongly graded Leavitt path algebras",
    Journal of Algebra and Its Applications, Vol. 21, No. 7, 9 pp. (2022)
    [ Preprint available @ arXiv ]

  30. J. Öinert and S. Wagner,
    "Complex group rings and group C*-algebras of group extensions",
    Journal of Algebraic Combinatorics, Vol. 58, 387-397 (2023)
    [ Preprint available @ arXiv ]

  31. D. Lännström and J. Öinert,
    "Graded von Neumann regularity of rings graded by semigroups",
    Beiträge zur Algebra und Geometrie, Vol. 65, 13-21 (2024)
    [ Preprint available @ arXiv ]

  32. P. Lundström, J. Öinert and J. Richter,
    "Non-unital Ore extensions",
    Colloquium Mathematicum, Vol. 172, No. 2, 217-229 (2023)
    [ Preprint available @ arXiv ]

  33. P. Lundström and J. Öinert,
    "Simplicity of Leavitt path algebras via graded ring theory",
    Bulletin of the Australian Mathematical Society, Vol. 108, No. 3, 428-437 (2023)
    [ Preprint available @ arXiv ]

  34. P. Lundström and J. Öinert,
    "Corrigendum: Group gradations on Leavitt path algebras",
    Journal of Algebra and Its Applications, Vol. 23, No. 6, 3 pp. (2024)

  35. S. Baghdari and J. Öinert,
    "Pure semisimple and Köthe group rings",
    Communications in Algebra, Vol. 51, No. 7, 2779-2790 (2023)
    [ Preprint available @ arXiv ]

  36. K. Lorensen and J. Öinert,
    "Generating numbers of rings graded by amenable and supramenable groups",
    Journal of the London Mathematical Society, Vol. 109, No. 1, e12826 (2024)
    [ Preprint available @ arXiv ]

  37. D. Bagio, D. Gonçalves, P. S. E. Moreira and J. Öinert,
    "The ideal structure of partial skew groupoid rings with applications to topological dynamics and ultragraph algebras",
    Forum Mathematicum, Vol. 36, No. 4, 1081-1117 (2024)
    [ Preprint available @ arXiv ]

  38. J. Öinert,
    "Units, zero-divisors and idempotents in rings graded by torsion-free groups",
    Journal of Group Theory, Vol. 27, No. 4, 789-811 (2024)
    [ Preprint available @ arXiv ]

  39. P. S. E. Moreira and J. Öinert,
    "Prime groupoid graded rings with applications to partial skew groupoid rings",
    Communications in Algebra, Vol. 52, No.7, 3134-3153 (2024)
    [ Preprint available @ arXiv ]

  40. P. Lundström, J. Öinert, L. Orozco and H. Pinedo,
    "Very good gradings on matrix rings are epsilon-strong",
    To appear in Linear and Multilinear Algebra.
    [ Preprint available @ arXiv ]

  41. N. Machado, J. Öinert and S. Wagner,
    "Non-Abelian extensions of groupoids and their groupoid rings",
    Accepted for publication in Applied Categorical Structures.
    [ Preprint available @ arXiv ]

Publications on mathematics education

  1. J. Öinert,
    "Planning and implementing mathematics lectures for first-year university students - 30 tips and tricks",
    Chapter 1 in "Improving University Science Teaching and Learning - Pedagogical Projects 2012", Vol. 5, No. 1, Ulriksen, L; Sølberg, J; Wase Hansen, H. (Eds.), pp. 3-17, Department of Science Education, University of Copenhagen (2013)

Preprints

  1. D. Lännström, P. Lundström, J. Öinert and S. Wagner,
    "Prime group graded rings with applications to partial crossed products and Leavitt path algebras", submitted.
    [ Preprint available @ arXiv ]

  2. A. Tarizadeh and J. Öinert,
    "Homogeneity in commutative graded rings".
    [ Preprint available @ arXiv ]

  3. K. Lorensen and J. Öinert,
    Rank conditions and amenability for rings associated to graphs, submitted.
    [ Preprint available @ arXiv ]

  4. P. Bäck, P. Lundström, J. Öinert and J. Richter,
    Ore extensions of abelian groups with operators.
    [ Preprint available @ arXiv ]

more coming soon...

Partial lists of my articles can be found on the arXiv, the Zentralblatt MATH and the MathSciNet. Google scholar keeps track of citations of my articles.


Presentations and attendances at conferences, workshops and seminars

  1. 3rd Øresund Symposium in Non-commutative Analysis and Non-commutative Geometry,
    January 30, 2004, Lund, Sweden

  2. Erasmus Intensive Program in Geometric and Algebraic Methods in Physics and Applications,
    September 4-15, 2005, Antwerp, Belgium

  3. Lie Days in Martina Franca, "Flags, Quivers and Invariant Theory in Lie Representation Theory",
    May 22-27, 2006, Martina Franca (Taranto), Italy

  4. Socrates Intensive Program in Geometric and Algebraic Methods in Physics and Applications,
    September 4-18, 2006, Antwerp, Belgium

  5. International Congress: New Techniques in Hopf Algebras and Graded Ring Theory,
    September 19-23, 2006, Brussels, Belgium

  6. Algebra, Geometry & Mathematical Physics, Baltic-Nordic Network Workshop,
    October 12-14, 2006, Lund, Sweden (Gave a talk.)

  7. Operator Methods in Fractal Analysis, Wavelets and Dynamical Systems,
    December 2-7, 2006, Banff, Canada (Gave a talk.)

  8. Algebraic and Geometric Representation Theory (AGLT),
    Århus, Denmark, June 25-29, 2007

  9. Socrates Intensive Program in Geometric & Algebraic Methods with Applications in Physics,
    Antwerpen, Belgium, August 27-September 9, 2007

  10. International Conference on Noncommutative Rings and Geometry in Honour of the 60th Birthday of Freddy Van Oystaeyen,
    Almeria, Spain, September 18-23, 2007

  11. Workshop on Interpolation Theory,
    Lund, Sweden, October 8, 2007 (Gave a talk.)

  12. Algebra, Geometry & Mathematical Physics, Baltic-Nordic Network Workshop,
    Göteborg, Sweden, October 11-13, 2007 (Gave a talk.)

  13. Svenska Matematikersamfundets Höstmöte,
    Växjö, Sweden, November 30-December 1, 2007

  14. LieGrits Workshop,
    Oxford, UK, January 3-9, 2008

  15. EMS Joint Mathematical Weekend,
    Copenhagen, Denmark, February 29-March 2, 2008

  16. 5th Øresund Symposium on Non-commutative Analysis and Non-commutative Geometry,
    Copenhagen, Denmark, April 10, 2008 (Gave a talk.)

  17. The Tribute Workshop in Honour of Professor Gunnar Sparr,
    Lund, Sweden, May 8-9, 2008

  18. Summer School: 'Symbolic Dynamics and Homeomorphisms of the Cantor Set',
    Copenhagen, Denmark, June 23-27, 2008

  19. 5th European Congress of Mathematics,
    Amsterdam, The Netherlands, July 14-18, 2008

  20. Operator Structures and Dynamical Systems,
    Lorentz Center, Leiden, The Netherlands, July 21-25, 2008 (Gave a talk.)

  21. Algebra, Geometry & Mathematical Physics, Baltic-Nordic Network Workshop,
    Tartu, Estonia, October 9-11, 2008 (Gave a talk.)

  22. Nordic-Öresund workshop: INANGA, "Inequalities, Interpolation, Non-commutative Analysis, Non-commutative Geometry and Applications",
    Lund, Sweden, November 17-18, 2008 (Gave a talk.)

  23. Svenska Matematikersamfundets Höstmöte,
    Linköping, Sweden, November 28-29, 2008 (Gave a talk.)

  24. Socrates Intensive Program in Geometric & Algebraic Methods with Applications in Physics,
    Antwerpen, Belgium, July 6-19, 2009

  25. PhD thesis defense,
    Lund, Sweden, August 17, 2009
    [The thesis may be downloaded here!]

  26. Topics in Mathematical Physics and Operator Algebra,
    September 7, 2009, Copenhagen, Denmark (Gave a talk.)

  27. Master Class on Von Neumann Algebras and Group Actions,
    January 25-29, 2010, Copenhagen, Denmark

  28. Workshop on Von Neumann Algebras and Group Actions,
    February 1-5, 2010, Copenhagen, Denmark

  29. NestFest - Conference in Honor of Ryszard Nest's 60th Birthday,
    September 2-5, 2010, Copenhagen, Denmark

  30. Intensive Program on Interpolation and Non-commutative Integration,
    September 30-October 5, 2010, Lund, Sweden

  31. Operator Algebras and Representation Theory: Frames, Wavelets and Fractals,
    October 8-10, 2010, Banff, Canada

  32. Algebra, Geometry & Mathematical Physics, Baltic-Nordic Network Workshop,
    October 25-31, 2010, Tjärnö, Sweden (Gave a talk.)

  33. Operator Algebras and Representation Theory: Frames, Wavelets and Fractals,
    March 27-April 2, 2011, Oberwolfach, Germany

  34. Joint Oslo-Trondheim operator algebra seminar,
    May 30-31, 2011, Trondheim, Norway (Gave a talk.)

  35. Hopf algebras and tensor categories,
    July 4-8, 2011, Almeria, Spain

  36. NordForsk Network Junior Workshop: Operator algebras and dynamical systems,
    September 14-17, 2011, Copenhagen, Denmark

  37. Workshop in honor of Kirchberg's 65th birthday,
    November 10-13, 2011, Copenhagen, Denmark

  38. Master Class on The Nuclear Dimension of C*-algebras,
    November 14-18, 2011, Copenhagen, Denmark

  39. Workshop: Matematiken i civilingenjörsutbildningarna - Ett seminarium tillägnat Lars-Christer Böiers i samband med hans pensionering,
    November 16, 2011, Lund, Sweden

  40. NordForsk Network Closing Conference: Operator algebras and dynamical systems,
    May 15-20, 2012, Gjógv, Faroe Islands (Gave a talk.)

  41. Mini-workshop: Commutative subalgebras, ideals and actions
    July 23-24, 2012, Lund, Sweden (Gave a talk.)

  42. 26th Nordic and 1st European-Nordic Congress of Mathematicians (Dedicated to the memory of Lars Hörmander)
    June 10-13, 2013, Lund, Sweden (Gave a talk.)

  43. Banach Algebras and Applications,
    July 29 - August 4, 2013, Gothenburg, Sweden

  44. Masterclass on Ergodic Theory and von Neumann algebras,
    October 14-18, 2013, Copenhagen, Denmark

  45. Öresundsdagen om grundkurser i matematik på universitet och högskolor,
    October 23, 2013, Lund, Sweden

  46. Docentföreläsning, PDF coming soon.
    December 12, 2013, Lund, Sweden

  47. Análise funcional geométrica e ações de grupos,
    February 19-21, 2014, Florianópolis, Brazil (Gave a talk.)

  48. The Renaissance Combinatorics Seminar,
    April 29, 2014, Helsinki, Finland (Gave a talk.)

  49. The 8th Øresund symposium on non-commutative analysis and non-commutative geometry,
    May 15, 2014, Lund, Sweden

  50. Den 12:e Sydostkonferensen om matematik,
    August 25, 2015, Karlskrona, Sweden (Gave a talk.)

  51. The 2nd Workshop on Dynamics, Numeration and Tilings (FloripaDynSys II),
    December 11-12, 2015, Florianópolis, Brazil (Gave a talk.)

  52. Brauer groups, Hopf algebras and monoidal categories, in honour of Stef Caenepeel on the occasion of his 60th birthday,
    May 23-27, 2016, Turin, Italy

  53. Kleindagarna @ Institute Mittag-Leffler,
    June 10-12, 2016, Stockholm, Sweden (Gave a talk.)

  54. Den 13:e Sydostkonferensen i matematik,
    August 25, 2016, Växjö, Sweden

  55. The MAM seminar,
    October 26, 2016, Västerås, Sweden (Gave a talk.)

  56. The joint UCL-ULB-VUB seminar on quantum groups, Hopf algebras and monoidal categories,
    February 20, 2017, Louvain-la-Neuve, Belgium (Gave a talk.)

  57. The 3rd Workshop on Dynamics, Numeration, Tilings and Graph Algebras (FloripaDynSys III),
    March 20-24, 2017, Florianópolis, Brazil (Gave a talk.)

  58. Installationsföreläsning (Eng: Inaugural lecture),
    May 18, 2017, Karlskrona, Sweden

  59. Den 14:e Sydostkonferensen i matematik,
    August 22, 2017, Karlskrona, Sweden (Gave a talk.)

  60. International Conference on Stochastic Processes and Algebraic Structures, in honour of Dmitrii S. Silvestrov on the occasion of his 70th birthday,
    October 4-6, 2017, Västerås and Stockholm, Sweden (Gave a talk.)

  61. Den 15:e Sydostkonferensen i matematik,
    August 28, 2018, Växjö, Sweden (Gave a talk.)

  62. The 1st SNAG meeting,
    September 27-28, 2018, Linköping, Sweden (Gave a talk.)

  63. Den 2:a Öresundsdagen om grundkurser i matematik på universitet och högskolor,
    October 31, 2018, Copenhagen, Denmark

  64. Conference: SYM 10 Years Old,
    June 24-28, 2019, Copenhagen, Denmark

  65. Den 16:e Sydostkonferensen i matematik,
    August 30, 2019, Karlskrona, Sweden (Gave a talk.)

  66. The 2nd SNAG meeting,
    October 17-18, 2019, Karlskrona, Sweden (Gave a talk.)

  67. Richard Kadison and his mathematical legacy - A memorial conference,
    November 29-30, 2019, Copenhagen, Denmark

  68. Den 17:e Sydostkonferensen i matematik,
    August 25, 2020, Online

  69. The 3rd SNAG meeting,
    September 24-25, 2020, Online (Gave a talk.)

  70. Danish-Norwegian workshop on Operator Algebras,
    November 25-28, 2021, Trondheim, Norway

  71. The 4th SNAG meeting,
    December 2-3, 2021, Online (Gave a talk.)

  72. Operator algebras, dynamics and groups (ICM 2022 satellite conference),
    July 1-4, 2022, Copenhagen, Denmark

  73. The second ANTIPODE workshop - A workshop on (partial) representations and related topics,
    September 12-13, 2022, Brussels, Belgium (Gave a talk.)

  74. Den 18:e Sydostkonferensen i matematik,
    October 28, 2022, Växjö, Sweden (Gave a talk.)

  75. Den 3:e Öresundsdagen om grundkurser i matematik på universitet och högskolor,
    November 2, 2022, Lund, Sweden

  76. The 5th SNAG meeting,
    March 28-29, 2023, Västerås, Sweden (Gave a talk.)

  77. The Quantum Symmetries Workshop,
    February 7-10, 2024, Warsaw, Poland

  78. The 6th SNAG meeting,
    March 21-22, 2024, Linköping, Sweden (Gave a talk.)

  79. Den 19:e Sydostkonferensen i matematik,
    August 20, 2024, Karlskrona, Sweden

  80. Den 4:e Öresundsdagen om grundkurser i matematik på universitet och högskolor,
    November 6, 2024, Copenhagen, Denmark
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I am a permanent member of the Swedish Mathematical Society and a member of the Lund Mathematical Society.


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