PREPRINTS

  1. Endomorphisms of the poset of idempotent matrices ( pdf
  2. Groups of order automorphisms of operator intervals, accepted in Acta Sci. Math. (Szeged) ( pdf
  3. with L. Plevnik, Automorphisms of effect algebras ( pdf
  4. with G. Geher, Isometries of Grassmann spaces, II ( pdf

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