Volume 19, 2013, Number 1

Volume 19 ▶ Number 1 ▷ Number 2Number 3Number 4


Sum of cubes is square of sum
Original research paper. Pages 1—13
Edward Barbeau and Samer Seraj
Full paper (PDF, 164 Kb) | Abstract

On the composition of the functions σ and φ on the set Zs+(P*)
Original research paper. Pages 14—18
Aleksander Grytczuk
Full paper (PDF, 152 Kb) | Abstract

Note on φ and ψ functions
Original research paper. Pages 19—21
V. Kannan and R. Srikanth
Full paper (PDF, 139 Kb) | Abstract

Note on φ, ψ and σ-functions. Part 6
Original research paper. Pages 22—24
Krassimir T. Atanassov
Full paper (PDF, 118 Kb) | Abstract

Gaussian Jacobsthal and Gaussian Jacobsthal Lucas polynomials
Original research paper. Pages 25—36
Mustafa Asci and Esref Gurel
Full paper (PDF, 164 Kb) | Abstract

On integer solutions of x4 + y4 – 2z4 = 0
Original research paper. Pages 37—43
Dustin Moody and Arman Shamsi Zargar
Full paper (PDF, 157 Kb) | Abstract

New explicit formulae for the prime counting function
Original research paper. Pages 44—49
Mladen Vassilev-Missana
Full paper (PDF, 159 Kb) | Abstract

Sharp Cusa–Huygens and related inequalities
Original research paper. Pages 50—54
József Sándor
Full paper (PDF, 130 Kb) | Abstract

A note on the density of the Greatest Prime Factor
Original research paper. Pages 55—58
Rafael Jakimczuk
Full paper (PDF, 148 Kb) | Abstract

A note on Bernoulli numbers
Original research paper. Pages 59—65
Ramesh Kumar Muthumalai
Full paper (PDF, 139 Kb) | Abstract

The structure of the Fibonacci numbers in the modular ring Z5
Original research paper. Pages 66—72
J. V. Leyendekkers and A. G. Shannon
Full paper (PDF, 149 Kb) | Abstract

On new refinements of Kober’s and Jordan’s trigonometric inequalities
Original research paper. Pages 73—83
József Sándor
Full paper (PDF, 174 Kb) | Abstract

Erratum to “Short remark on Jacobsthal numbers”
Erratum. Page 84
Krassimir T. Atanassov
Erratum (PDF, 74 Kb)


Volume 19 ▶ Number 1 ▷ Number 2Number 3Number 4

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