The articles discusses the necessity to improve, during the process of lifelong learning, professional qualifications and mathematical culture of mathematics teachers. The conclusions are based on both the Polish and ...

This article presents conclusions concerning mathematization, which is a very vital mathematical activity, as well as conclusions concerning modelling and a model, including a mathematical model. Mathematical models are ...

Generalizations are very common in mathematics. A generalization may be a process (mathematical activity) and a product in the form of mathematical concepts, tasks, theorems, hypotheses, methods of reasoning and argumentation. ...

This paper presents a structural approach to widely known numerical averages. Several equivalent conditions for a sequence to be an arithmetic sequence are formulated and prooved. Further, these conditions, expressed by ...

This article deals with some theorems on the principal argument of complex numbers. This paper is a framework of the lecture on the argument of complex numbers. Moreover, it presents some remarks on the formula which is ...

The article raises the question: What kind of mathematics is necessary for future engineers? Using some interesting examples from his experience, the author presents the idea of unity in mathematics for all users.