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A Taylor type theorem with lateral derivative
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Bolyai was born 200 years ago
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Circle escribable to a quadrilateral
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Computing some definite integrals
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Encryption of a file with secret key in Visual Basic 6.0
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From undeciphering to deciphering in mathematics
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Looking to the Eastern Europe Mathematical Community
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On multiple choice examination
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On some properties of some special trapezoids
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On the implicit function theorem
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On the monotony of a sequence
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On the order of convergence of some sequences of Riemann’s sums of functions with convex derivative
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On the water-rocket engine problem. A case study in mathematical modeling
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Operators of evolution and operators of functioning
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Posibilities of implementation of some forecasting principles in Microsoft Excel
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Remarkable properties of quadrilaterals proved with the help of complex numbers
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Some recurrent integral formulas
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Sur un probleme de numeration
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The problems given at “American Mathematics Competitions 10” from february 13, 2001
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The problems given at “American Mathematics Competitions 12” from february 13, 2001
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The problems given at IMC-9, Warsaw, july 19-25, 2002
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Triangles in which an angle is a mean of the others
