Volume 8, 2002, Number 4

Volume 8Number 1Number 2Number 3 ▷ Number 4


Restrictive factor: Definition, properties and problems
Original research paper. Pages 117—119
Krassimir T. Atanassov
Full paper (PDF, 82 Kb)

A note on the elementary number theory
Original research paper. Pages 120—124
Krassimir T. Atanassov
Full paper (PDF, 140 Kb)

On a way for introducing metrics in Cartesian product of metric spaces
Original research paper. Pages 125—128
Peter M. Vassilev and Mladen V. Vassilev-Missana
Full paper (PDF, 139 Kb)

On one remarkable identity related to function π(x)
Original research paper. Pages 129—136
Mladen V. Vassilev-Missana
Full paper (PDF, 239 Kb)

A note on solving and analysing of the full cubic equation
Original research paper. Pages 137—144
Blagoi N. Djokov
Full paper (PDF, 282 Kb)

Intervals containing prime numbers
Original research paper. Pages 145—148
Laurențiu Panaitopol
Full paper (PDF, 128 Kb) | Abstract

For x > 0, let π(x) be the number of prime numbers not exceeding x. One shows that, for x > 7, there exists at least one prime number between x and x + π(x), thus obtaining a result that is sharper than the one postulated by Bertrand.

Volume 8Number 1Number 2Number 3 ▷ Number 4

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