Yusenko Kostyantyn

Iusenko Kostiantyn

Contact information

Research interests

Curriculum vitae

Articles and Preprints

Articles

1. Kostiantyn Iusenko, Evan Wilson. Some remarks on Hall algebras of bound quivers. accepted.
2. Vitalij M. Bondarenko, Vyacheslav Futorny, Tatiana Klimchuk, Vladimir V. Sergeichuk, Kostyantyn Yusenko. Systems of subspaces of a unitary space. Linear Algebra Appl. 438 (2013), no. 5, pp. 2561-2573. ArXiv
3. Kostyantyn Yusenko, Thorsten Weist. Unitarizable representations of quivers. Algebr. Represent. Theory 16 (2013), no.5, pp. 1349-1383. ArXiv
4. Futorny Vyacheslav, Samoilenko Yurii, Kostyantyn Yusenko. Representations of posets: Linear vs Unitary Journal of Physics: Conference Series, 346, 1, (2012), pp. 12006-12022, available at ArXiv.
5. Samoilenko Yurii, Kostyantyn Yusenko. Kleiner's theorem for unitary representations of posets. Linear Algebra and Its Applications 437, Issue 2, (2012), pp. 581–-588, available at ArXiv.
6. Roman Grushevoy, Kostyantyn Yusenko. On the unitarization of linear representations of primitive partially ordered sets. Operator Theory: Advances and Applications 190, (2008), pp. 279–-294. ArXiv
7. Yu. P. Moskaleva, V. L. Ostrovskii, K. A. Yusenko. On quadruples of linearly connected projections and transitive systems of subspaces. Methods Funct. Anal. Topol. 13 (2007), no. 1, pp. 43--49. PDF
8. Kostyantyn Yusenko. On quadruples of projections connected with linear relation. Ukr. Math. J. 58 (2006), no. 9, pp. 1289--1295. PDF
9. Kostyantyn Yusenko. On existence of *-representations of certain algebras related to extended Dynkin graphs. Methods Funct. Anal. Topol. 12 (2006), no. 2, pp. 197--204. PDF

Preprints

1. Kostyantyn Yusenko, Thorsten Weist. Unitarizable representations of quivers. preprint, 22p. Preprint 2011:4, Chalmers University of Technology, also available here ArXiv
2. Roman Grushevoy, Kostyantyn Yusenko. Unitarization of linear representations of non-primitive posets. preprint, 32p., Preprint 2010:35, Chalmers University of Technology, also available here ArXiv

In progress

1. Vyacheslav Futorny, Thorsten Weist, Kostyantyn Yusenko. Gale duality and Coxeter functors for posets.
2. Vladimir Sergeichuk, Kostyantyn Yusenko. Mixed representations of quivers.
3. Danylo Yakimenko, Kostyantyn Yusenko. Stability of schurian representations of (N,4)-poset.

Visits

Research Visits

• Visit at Institute of Pure and Applied Mathematics (IMPA) (Rio de Janeiro, Brazil)
  January 15th - January 29th, 2012
• Visit at University of Wuppertal (Germany)
  April 20th - April 29th, 2010
  November 28th - December 3rd, 2010
  January 31th - February 4th, 2012
• Visit at University of Leipzig (Germany)
  March 28th - April 19th, 2010
  November 5th - November 27th, 2010
• Trimester program "Rigidity", Hausdorff Institute for Mathematics, Bonn (Germany)
  October 16th - December 16th, 2009

Recent visited conferences and shools

• XXII Brazilian Algebra Meeting
  Salvador, Brazil
  15 July - 20 July, 2012
  
  
• 6th European Congress of Mathematics
  Krakow, Poland
  2 July - 7 July, 2012
  
  
• Meeting on Commutative Algebra and Algebraic Geometry
  Maresias, Brazil
  16 October - 22 October, 2011
  
  Some Photos
• First Latin American School on Algebraic Geometry and Applications
  Buenos-Aires, Argentina
  01 July - 5 July, 2011
  
  Robin Hartshorne's lectures   Some Photos
• 28th Brazilian Mathematical Colloquium
  Rio de Janeiro, Brazil
  17 July - 27 July, 2011
• XV ELAM. Latinamerican School of Mathematics. Non-commutative algebra and Lie Theory
  Cordoba, Argentina
  16 May - 27 May, 2011
  
  Pere Ara's lectures   K. R. Goodearl's lectures   Alex Lubotzky's presentations   David Vogan's lectures   Adriano Moura's lectures   Basic courses (representations of group, Galois theory, theory of modules)  
• Summer school on C*-algebras and their interplay with dynamical systems
  Sophus Lie Conference Center in Nordfjordeid, Norway
  31 May - 4 June, 2010
  
  Andreas Thom's lectures   Kalishewskii and Quigg's lectures   Aidan Sims' lectures
• Von Neumann algebras and group actions
  Master Class, The University of Copenhagen, Denmark
  25-29 January, 2010
• Operator Algebras and Applications
  International Summer School, IST, Lisbon, Portugal
  15-19 June, 2009

Future events

Activities

Grants

• Ukrainian Grant for Young Scientists (with Volodymyr Tesko). 07.2009-12.2010
• PostDoc Scholarship by Swedish Institute (Chalmers, Gothenburg, Sweden, supervisor - Ludmila Turowska). 09.2009-08.2010

Some Notes of Given Talks

• Corona Theorem. Talk at the seminar in Institute of Math., Ukraine, Winter 2009 (in Ukrainian)
  PDF
• Additive spectral problem. Talk at the seminar in IST, Lisbon, Portugal, Summer 2009
  PDF
• More notes are available on this web-page.

Organizered/coorganized learning seminars

• Basic Algebraic Geometry, 2005-2006, IM, Kiev, Ukraine
• K-theory for operator algebras, 2005-2006, IM, Kiev, Ukraine
• Introduction to Algebraic Topology, 2006-2007, IM, Kiev, Ukraine
• C*-seminar, 2008-2009, IM, Kiev, Ukraine
  Problem Sets       Set 1   Set 2   Set 3
• Introduction to Algebraic Geometry, 2011, IM, Kiev, Ukraine
• Jounior and Postdoc seminars on Representation Theory, 2012, IME, Sao-Paulo, Brazil