Vol. 96 (2004): Ann. Sofia Univ. Fac. Math and Inf.

Articles

• Editorial note

  N. Bujukliev

  3-7

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• SOME SHORT HISTORICAL NOTES ON DEVELOPMENT OF MATHEMATICAL LOGIC IN SOFIA

  Dimiter Skordev

  11-21

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• SOME RESULTS ON THE UPPER-SEMILATTICE OF R.E. $m$-DEGREES INSIDE A SINGLE R.E. $tt$-DEGREE

  Angel Ditchev

  23-34

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• CO-SPECTRA OF JOINT SPECTRA OF STRUCTURES

  Alexandra Soskova, Ivan Soskov

  35-44

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• DEGREE SPECTRA AND CO-SPECTRA OF STRUCTURES

  Ivan Soskov

  45-68

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• GENERALIZED TURAN’S GRAPH THEOREM

  Nikolay Khadzhiivanov, Nedyalko Nenov

  69-73

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• BOUNDS ON THE VERTEX FOLKMAN NUMBER $F(4, 4; 5)$

  Nedyalko Nenov

  75-83

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• LOWER BOUNDS FOR SOME RAMSEY NUMBERS

  Nedyalko Nenov

  85-87

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• MAXIMAL DEPTHS OF BOOLEAN FUNCTIONS

  Dimiter Skordev

  89-99

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• (2,3)-generation of the groups PSL${}_4\big(2^m\big)$

  Petar Manolov, Kerope Tchakerian

  101-104

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• INSTABILITY OF SOLITARY WAVE SOLUTIONS OF A CLASS OF NONLINEAR DISPERSIVE SYSTEMS

  Sevdzhan Hakkaev

  105-115

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• ESTIMATES FOR THE SINGULAR SOLUTIONS OF THE 3-D PROTTER’S PROBLEM

  Nedyu Popivanov, Todor Popov

  117-139

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• THE TRIGONOMETRIC ANALOGUE OF THE TAYLOR’S FORMULA AND ITS APPLICATION

  Borislav Draganov

  141-154

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• EXISTENCE OF STRONG M-BASES IN NONSEPARABLE BANACH SPACES

  Diana Stoeva

  155-161

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• ON LOWER BOUNDS OF THE SECOND-ORDER DINI DIRECTIONAL DERIVATIVES

  Vsevolod Ivanov

  163-171

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• LETTER TO THE EDITOR. TURAN’S THEOREM AND MAXIMAL DEGREES

  Nikolay Khadzhiivanov, Nedyalko Nenov

  173-174

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