**Volume 6** ▶ Number 1 ▷ Number 2 ▷ Number 3 ▷ Number 4

**Some remarks concerning the Bernoulli numbers**

*Original research paper. Pages 29—33*

S. Tabirca

**Some new equations concerning the Euler function**

*Original research paper. Pages 34—38*

S. Tabirca and T. Tabirca

**On prime k-tuples conjectures**

*Original research paper. Pages 39—44*

V. Jotsov

**On the one-sided orderability for semigroups**

*Original research paper. Pages 45—55*

A. Baxhaku and M. Aslanski

**On the cardinal of the linear stable orders in a class of semigroups**

*Original research paper. Pages 56—60*

A. Baxhaku and M. Aslanski

**Connections in mathematics: Fibonacci sequence via arithmetic progression**

*Original research paper. Pages 61—63*

K. Atanassov

**On a formula related to the n-th partial sum of the harmonic series**

*Original research paper. Pages 64—68*

M. Vassilev-Missana

**Volume 6**▶ Number 1 ▷ Number 2 ▷ Number 3 ▷ Number 4