Recent conferences and research visits:

• December 2004: ICMIA2004 - International Conference in Mathematical Inequalities and Applications,
  Victoria University of Technology, Melbourne
  Keynote Presentation: "Integral Inequalities Related to Hardy's Inequality"
  
  
• June 2003: OTOA 2003 - Operator Theory and Operator Algebras Conference, Palermo, Italy
  Invited lecture: "New additive results for the g-Drazin operator inverse"
  
  
• April-June 2003: Research visits
  Aachen Technical University (RWTH), Aachen, Germany
  Academy of Sciences of Czech Republic, Prague, Czech Republic
  University of Nis, Nis, Serbia-Montenegro
  
  
• March-May 2001: Research visits
  Universidad Politecnica de Madrid (UPM), Madrid, Spain
  University Mohamed I, Oujda, Morocco
  Universidade do Minho, Braga, Portugal
  Aachen Technical University (RWTH), Aachen, Germany
  Academy of Sciences of Czech Republic, Prague, Czech Republic
  
  
• July 2000: Third World Congress of Nonlinear Analysts WCNA 2000 , Catania
  
  
• July 2000: Conference on Equations of Evolution EVEQ 2000, Prague
  
  
• June 2000: Operator Theory Conference OT18, Timisoara
  Invited lecture "The Drazin inverse for closed operators and its applications"
  
  
• June 1998: Korea Operator Theory Conference KOTAC 98, Suwon and Daegu
  Invited lectures "The Drazin inverse: Theory and applications" and "Circularly isolated spectral sets"
  (invited also to KOTAC 1999 and 2000)
  
  
• July 1997: Conference Geometry of Banach Spaces, Auckland
  Contributed talk "Lower and upper semi-iner product and six related functions
  
  
  
  

  My Erdos number is 3

  The Erdos number of a person is the length of a shortest chain of joint mathematical publications leading to the famous mathematician Paul Erdos. My chain:

  (Erdos, Rodl),   (Rodl, Muller),   (Muller, Koliha)

  P. Erdos and V. Rodl, Coverings of r-graphs by complete r-partite subgraphs, Random Structures Algorithms 6 (1995), 2-3.

  V. Muller and V. Rodl, Monotone paths in ordered graphs, Combinatorica 2 (1982), 193-201.

  J. J. Koliha, M. Mbekhta, V. Muller and P. W. Poon, Corigendum and addendum: "On the axiomatic theory of the spectrum II", Studia Mathematica 130 (1998), 193-198.