Vol. 100 (2011): Ann. Sofia Univ. Fac. Math and Inf.

Articles

• FACTORIZATIONS OF SOME SIMPLE LINEAR GROUPS

  Elenka Gentcheva

  5-9

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• A NOTE ON THE SECTIONAL CURVATURE

  Stefka Hineva

  11-20

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• ON THE DIVISIBILITY OF ARCS WITH MULTIPLE POINTS

  Ivan Landjev, Assia Rousseva

  21-26

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• NON-EXISTENCE OF FLAT PARACONTACT METRIC STRUCTURES IN DIMENSION GREATER THAN OR EQUAL TO FIVE

  Simeon Zamkovoy, Vassil Tzanov

  27-34

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• EXACT EFFECTIVE ENUMERATIONS OF TOTAL FUNCTIONAL STRUCTURES

  Angel Ditchev

  35-46

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• MODAL OPERATORS FOR RATIONAL GRADING

  Tinko Tinchev, Mitko Yanchev

  47-66

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• MODEL REPRESENTATIONS OF THE LIE–GEIZENBERG ALGEBRA OF THREE LINEAR NON-SELFADJOINT OPERATORS

  Victoriya Kuznetsova

  67-92

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• MODEL REPRESENTATIONS OF THE LIE ALGEBRA $[A_2, A_1] = iA_1$ OF LINEAR NON-SELFADJOINT OPERATORS

  Victoriya Kuznetsova

  93-112

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• SYMMETRIES OF THE HERGLOTZ VARIATIONAL PRINCIPLE IN THE CASE OF ONE INDEPENDENT VARIABLE

  Bogdana Georgieva

  113-122

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• COMBINATORY SPACES VERSUS OPERATIVE SPACES WITH STORAGE OPERATION

  Jordan Zashev

  123-142

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